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SCIENCE STRAND

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Title: SCIENCE STRAND


1
SCIENCE STRAND
  • PHYSICAL SCIENCE

2
  • Question How would you separate the salt from
    water in a salt solution?

3
  • Question How would you separate the salt from
    water in a salt solution?
  • Answer To separate mixtures use the difference
    in physical properties of substances mixed. Salt
    and water boil at different temperatures so
    heating the solution until it boils will allow
    the water to vaporize but the salt will remain
    solid at that temperature.

4
  • Question Explain why defining a frame of
    reference is important when describing motion.

5
  • Question Explain why defining a frame of
    reference is important when describing motion.
  • Answer Because everything in the universe is in
    motion, true absolute motion cannot be
    determined, and only motion relative to a point
    of reference can be determined.

6
  • Question Explain why it requires more force to
    stop a heavy object in motion than a lighter
    object moving at the same pace.

7
  • Question Explain why it requires more force to
    stop a heavy object in motion than a lighter
    object moving at the same pace.
  • Answer Force causes a mass to accelerate. Due
    to inertia, the greater the mass of the object,
    the greater the amount of force needed to move
    the object or stop it from moving.

8
  • Question Describe gravity and how it affects
    objects of different mass on Earth.

9
  • Question Describe gravity and how it affects
    objects of different mass on Earth.
  • Answer Gravity is the attractive force that all
    objects exert on each other. Gravitation between
    objects increases as mass increases and as the
    distance between the objects decreases.

10
  • Question What is sound?

11
  • Question What is sound?
  • Answer Sound is a vibration that moves through
    matter as a wave.

12
  • Question Compare and contrast the movement of
    sound through solids, liquids and gases (air)?

13
  • Question Compare and contrast the movement of
    sound through solids, liquids and gases (air)?
  • Answer Sound is produced by vibrations of matter
    and can move through all three states of matter.
    The closer the particles in the matter, the
    faster the sound will travel. Therefore, sound
    travels fastest through solids and slowest in
    air.
  • ?

14
Sounds travel at different speeds through
different materials. Sound travels faster through
solids and liquids than gases. Sound is unable
to travel through a vacuum because there is no
matter to vibrate.
15
  • Question Which glass soda bottle in the
    picture of bottles filled with various amounts
    of water would have the highest pitch when
    tapped? Explain your answer.

16
  • Question Which glass soda bottle in the picture
    of bottles filled with various amounts of water
    would have the highest pitch when tapped?
    Explain your answer.
  • Answer Tapping the bottles
  • causes the glass of the bottle to
  • vibrate and produce sound. The
  • water dampens these vibrations.
  • So, the less water in the bottle, Click for
    example.
  • the faster the bottle vibrates and the higher
    the pitch.

17
  • Question Draw what a pencil looks like
    partially submerged in a glass of water. What is
    the distortion of the pencil image caused by?

18
  • Question Draw what a pencil looks like
    partially submerged in a glass of water. What is
    the distortion of the pencil image caused by?
  • Answer Light Refraction

SCIENCE GRADE 4
19
  • Question Explain why refraction occurs.

20
  • Question Explain why refraction occurs.
  • Answer The light that allows you to see the
    pencil below the water must travel through the
    water, the glass, and then the air to reach your
    eyes.  The light rays are bent as they move
    through different matter and slowed so that they
    reach your eyes slightly after the rays from the
    pencil above the water.  This time difference is
    enough to distort the image. 

21
  • Question Draw a diagram of light traveling
    through a prism and explain why the light is
    bending.

22
  • Question Draw a diagram of light traveling
    through a prism and explain why the light is
    bending.
  • Answer The prism causes the light to slow down.
    Since the light enters it at an angle, this
    causes the light to bend and
  • separate into the
  • different colors.

23
  • Question What are the colors of the visible
    spectrum?

24
  • Question What are the colors of the visible
    spectrum?
  • Answer ROY G. BIV
  • Red ? Blue
  • Orange ? Indigo
  • Yellow ? Violet
  • Green

25
  • Question What kind of clothing would keep you
    the warmest on a cold day? Explain your answer.

26
  • Question What kind of clothing would keep you
    the warmest on a cold day? Explain your answer.
  • Answer a hat a scarf or knit mask to cover face
    and mouth mittens/gloves several layers of
    loose-fitting clothing. These all act as
    insulators to trap heat that the body produces.

27
  • Question Explain how you could use a circuit to
    test for conductors and insulators.

28
  • Question Explain how you could use a circuit to
    test for conductors and insulators.
  • Answer Conductors are materials that conduct
    electricity. Insulators are materials that do not
    conduct electricity. Make a circuit with a light
    bulb in which different materials can be placed
    to test their conductivities. A conductor will
    form a complete circuit and light the bulb. An
    insulator will form an incomplete circuit, and
    the bulb will not light.

29
  • Question Explain how electricity powers a light
    bulb and produces light.

30
  • Question Explain how electricity powers a light
    bulb and produces light.
  • Answer Electrical energy passes through the
    filament in the bulb
  • making it hot. This
  • makes the filament
  • glow and produce
  • light.

SCIENCE GRADE 4
31
  • Question Given the following list of materials,
    identify the items as electrical
    insulators/conductors, magnet/non-magnetic, and
    good/fair/poor heat conductor.
  • Rubber
  • Copper
  • Paper
  • Tap water
  • Styrofoam
  • Wood
  • Iron

32
  • Question Given the following list of materials,
    identify the items as electrical
    insulators/conductors, magnet/non-magnetic, and
    good/fair/poor heat conductor.
  • Answer
  • Rubber- insulator non-magnetic poor conductor
  • Copper- conductor non-magnetic good conductor
  • Paper- insulator non-magnetic poor conductor
  • Tap water- conductor non-magnetic fair
    conductor
  • Styrofoam- insulator non-magnetic poor
    conductor
  • Wood- insulator non-magnetic poor conductor
  • Iron- conductor magnetic good conductor

33
  • Question Explain how electricity has influenced
    society.

SCIENCE GRADE 4
34
  • Question Explain how electricity has influenced
    society.
  • Answer The generation of large amounts of
    electricity and the development of reliable
    delivery systems changed the world. Once
    electricity was cheap and reliable, other
    inventions followed. Availability of electricity
    led to widespread use of electric appliances,
    some of which we still use today. Electricity
    was everywhere and it was changing the way people
    lived.

35
  • Question What does the graph indicate about the
    speed of the car?

36
  • Question What does the graph indicate about the
    speed of the car?
  • Answer The car was traveling at a constant
    speed of 20 km/hr.

37
  • Question Identify 3 different forms of energy

38
  • Question Identify 3 different forms of energy
  • Answer sound, heat, light, ultraviolet,
    electrical

39
  • Question Describe 3 basic energy
    transformations. Include one transformation that
    involves friction.

40
  • Question Describe 3 basic energy
    transformations. Include one transformation that
    involves friction.
  • Answer Examples from light to heat, from
    potential to kinetic, from electrical to heat and
    light, from chemical to electrical.
  • The flow of electricity produces heat due to
    friction.

41
  • Question Identify a force that causes an object
    to move. What determines the direction and amount
    of movement.

42
  • Question Identify a force that causes an object
    to move. What determines the direction and amount
    of movement.
  • Answer A push or pull is a force that causes an
    object to move. The direction and amount of
    movement are determined by the total amount of
    the net force.

43
  • Question Differentiate between the weight and
    mass of objects.

44
  • Question Differentiate between the weight and
    mass of objects.
  • Answer Mass is the amount of matter or stuff
    in an object and is not affected by gravity. The
    weight of an object is determined by both mass
    and the force of gravity on that object.

45
  • Question Explain how water changes from solid
    to liquid to gas.

46
  • Question Explain how water changes from solid
    to liquid to gas.
  • Answer As the water is heated, the molecules
    move faster and move apart from each other to
    form a liquid. As heating continues the molecules
    move even faster and farther apart to form a gas.

47
  • Question Identify the three states of matter
    and describe how molecules move through each
    state (for example, water).

48
  • Question Identify the three states of matter
    and describe how molecules move through each
    state (for example, water).
  • Answer The three states of matter are solid,
    liquid and gas. In a solid the particles move the
    slowest and vibrate in fixed positions. In a
    liquid the particles move faster and slide past
    each other. The particles of a gas move very fast
    and bounce off of each other causing them to
    spread apart from each other.

49
SCIENCE STRAND
  • EARTH AND SPACE SCIENCE

50
  • Question Explain the difference between weather
    and climate.

51
  • Question Explain the difference between weather
    and climate.
  • Answer Weather is the state of the atmosphere at
    a particular time and place with respect to
    temperature, moisture, wind velocity, and
    barometric pressure. Climate is the average
    weather conditions in a given area over time.

52
  • Question Explain how climate is affected by
    bodies of water, landforms and latitude.

53
  • Question Explain how climate is affected by
    bodies of water, landforms and latitude.
  • Answer Climate varies widely from location to
    location on Earth because the sun's heat is not
    distributed evenly over the entire planet for the
    following reasons
  • distance from the equator (equator is warmer)
  • large bodies of water (oceans and lakes absorb
    and store large amounts of heat that winds then
    carry to nearby land masses, resulting in a
    warmer climate and higher annual rain and
    snowfall)
  • elevation, or height above sea level-the higher
    the elevation, the cooler the climate.

54
  • Question Use the weather forecast
    from a newspaper to describe the weather on
    Saturday, July 14.

55
  • Question Use the weather forecast
    from a newspaper to describe the weather on
    Saturday, July 14.
  • Answer Weather on July 14 will be partly cloudy
    with high temperatures of about 110 and lows
    about 84. Humidity will be low (10).

56
  • Question Explain the terms runoff and
    groundwater.

57
  • Question Explain the terms runoff and
    groundwater.
  • Answer
  • Runoff- Rainfall not absorbed by soil.
  • Groundwater- Water that collects or flows beneath
    the Earth's surface, filling the porous spaces in
    soil, sediment, and rocks. Groundwater originates
    from rain and from melting snow and ice and is
    the source of water for aquifers, springs, and
    wells. The upper surface of groundwater is the
    water table.

58
  • Question List safety measures to prepare for a
    hurricane.

59
  • Question List safety measures to prepare for a
    hurricane.
  • Answer Have a disaster plan. Have a pet plan.
    Board up windows. Bring in outdoor objects that
    could blow away. Know the evacuation routes.
    Prepare a disaster supplies kit for your home and
    car. Have enough food and water for at least 3
    days. Include a first aid kit, canned food and a
    can opener, bottled water, battery-operated
    radio, batteries, flashlight, protective clothing
    and written instructions on how to turn off
    electricity, gas, and water. Have cash handy.
    Make sure your car is filled with gasoline.

60
  • Question Identify components of the Earths
    crust.

61
  • Question Identify components of the Earths
    crust.
  • Answer
  • rocks,
  • minerals,
  • soil

SCIENCE GRADE 4
62
  • Question List 2 slow processes that change the
    Earths processes.

63
  • Question List 2 slow processes that change the
    Earths processes.
  • Answer Answers will vary weathering, erosion,
    transforming of rocks in the rock cycle, mountain
    building

64
  • Question List 2 rapid processes that change the
    Earths crust.

65
  • Question List 2 rapid processes that change the
    Earths crust.
  • Answer Answers will
  • vary volcanic eruptions,
  • tsunamis, floods,
  • earthquakes.

66
  • Question Explain the difference between
    weathering and erosion.

67
  • Question Explain the difference between
    weathering and erosion.
  • Answer Many people confuse weathering and
    erosion.  When some thing is weathered it is
    broken down into
  • smaller pieces, but when
  • something is eroded it
  • is carried away. 

68
  • Question Explain how some common rocks are used.

69
  • Question Explain how some common rocks are
    used.
  • Answer We use rocks for roads, metals, jewelry,
    tombstones, building materials, cosmetics, and
    many, many more things. Most of the famous
    sculptures of the world are made from blocks of
    stones such as granite and marble.

70
  • Question Explain how can the age of rock layers
    be deduced from fossils?

71
  • Question Explain how can the age of rock layers
    be deduced from fossils?
  • Answer If a fossil of known age is found in a
    rock layer, it tells us when the
  • rock was formed.
  • The rock has the same
  • age as the fossil.

72
  • Question Describe the organic and inorganic
    components of soil.

73
  • Question Describe the organic and inorganic
    components of soil.
  • Answer Inorganic water, air, minerals
  • Organic living or once living

74
  • Question List the three particle sizes found in
    soil from largest to smallest.

75
  • Question List the three particle sizes found in
    soil from largest to smallest.
  • Answer sand (largest), silt, clay (smallest)

76
  • Question As particles settle, which size settles
    first, and which settles last.

77
  • Question As particles settle, which size settles
    first, and which settles last.
  • Answer sand settles first, then silt and finally
    clay

78
  • Question Define soil permeability and rank the
    particle sizes (sand, silt, clay) by increasing
    permeability.

79
  • Question Define soil permeability and rank the
    particle sizes (sand, silt, clay) by increasing
    permeability.
  • Answer Soil permeability is the ability of water
    to flow through a soil. Sand is the most
    permeable due to the large particle size and
    space between the particles. Silt ranks second in
    permeability, and clay is the least permeable
    because it has the least pore space.

80
  • Question Label a diagram of the earths orbit
    showing the correct locations of the earth at the
    beginning of each season in the Northern
    Hemisphere.

81
  • Question Label a diagram of the Earths orbit
    showing the correct locations of the Earth at the
    beginning of each season in the Northern
    Hemisphere.
  • Answer

82
  • Question Explain how the Earths location in
    its orbit and the tilt of the Earth create the
    seasons.

83
  • Question Explain how the Earths location in
    its orbit and the tilt of the Earth create the
    seasons.
  • Answer N Hem tilted toward sun summer, away
    from sun winter, Not tilted toward or away
    fall or spring
  • SEE NEXT PAGE ?

84
  • The Earth is tilted and direct light causes more
    heat than indirect light.
  • When the Northern hemisphere is pointing at the
    sun, sunlight falls most directly on it. This is
    summer in the Northern Hemisphere. As the Earth
    moves around to the other side of the Sun the
    Northern Hemisphere is tilted away from the Sun.
    Now the light falls indirectly on it. It is
    winter.
  • The exact opposite is happening in the Southern
    hemisphere. When the Northern Hemisphere has
    summer, the Southern Hemisphere has winter, and
    the other way round.

85
  • Question Explain why the sun is important to
    Earth systems.

86
  • Question Explain why the sun is important to
    Earth systems.
  • Answer The Sun provides Earth with vast amounts
    of energy every day. The water cycle is fueled by
    the sun. Plants use the Suns energy to make
    food, and plants provide food for other
    organisms. The Suns energy also creates wind in
    Earths atmosphere. This wind can be harnessed
    and used to produce power.

87
  • Question Explain why the sun appears to move
    across the sky.

88
  • Question Explain why the sun appears to move
    across the sky.
  • Answer The sun appears to move around the earth
    every day because the earth rotates around its
    own axis every day. This makes the sun appear to
    rise in the east and set in the west.

89
  • Question Sequence the Moon phases waxing
    gibbous, waxing crescent, full moon, last
    quarter, new moon, waning crescent, first
    quarter, and waning gibbous.

90
  • Question Sequence the Moon phases waxing
    gibbous, waxing crescent, full moon, last
    quarter, new moon, waning crescent, first
    quarter, and waning gibbous.
  • Answer

91
  • Question Label appropriate diagrams
    illustrating the lunar eclipse and solar eclipse.

92
  • Question Label appropriate diagrams
    illustrating the lunar eclipse and solar eclipse.
  • Answer

Lunar Eclipse
Solar Eclipse
93
  • Question What is the order of the planets from
    the sun?

94
  • Question What is the order of the planets from
    the sun?
  • Answer My Very Educated Mother Just
  • Served Us Nine Pizzas.
  • Mercury Jupiter
  • Venus Saturn
  • Earth Uranus
  • Mars Neptune
  • Pluto (no longer classified
    as a planet)

95
  • Question Describe characteristics of the outer
    and inner planets.

96
  • Question Describe characteristics of the outer
    and inner planets.
  • Answer  The inner planets are Mercury, Venus,
    Earth and Mars. The inner planets are the
    smallest planets of the solar system and have a
    rocky composition- the terrestrial planets.
    Beyond Mars lies the Asteroid belt that separates
    the inner planets from the outer planets.
  • The outer planets are Jupiter, Saturn, Uranus
    and Neptune. These are the Jovian planets or the
    gas giants. The outer planets are the largest in
    the solar system and made mostly of gas.

97
  • Question How has technology improved our
    knowledge of the universe?

98
  • Question How has technology improved our
    knowledge of the universe?
  • Answer Advances in different types of telescopes
    and satellites have allowed scientists to learn
    more about the universe. Technologies developed
    for space exploration have also increased our
    knowledge of the universe.

99
  • Question Draw, label, and explain the
    components of a water cycle.

100
  • Question Draw, label, and explain the
    components of a water cycle.
  • Answer
  • 1. The energy from
    the sun fuels the
    water cycle.

101
  • Question Draw, label, and explain the
    components of a water cycle.
  • Answer
  • 2. Water vaporizes
    into the
    atmosphere.

102
  • Question Draw, label, and explain the
    components of a water cycle.
  • Answer
  • 3. Water vapor
    condenses
    around
    particles
    in the air forming
    clouds.

103
  • Question Draw, label, and explain the
    components of a water cycle.
  • Answer
  • Water precipitates
  • from the condensed
  • water in clouds and
  • falls to the earth in
  • the form of rain,
  • snow, sleet or hail.

104
  • Question Draw, label, and explain the
    components of a water cycle.
  • Answer
  • 5. Surface water
    collects in
    streams and
    rivers and flows
    to lakes and

    oceans.

105
  • Question Distinguish between Earths revolution
    around the Sun and Earths rotation on its axis.

106
  • Question Distinguish between Earths revolution
    around the Sun and Earths rotation on its axis.
  • Answer Revolution the movement of the earth
    around the sun in a year
  • Rotation the spinning of earth on its own axis
    in a day

107
SCIENCE STRAND
  • LIFE SCIENCE

108
  • Question Explain the function of each of the
    following parts of a plant stems, roots,
    leaves, flowers, and seeds

109
  • Question Explain the function of each of the
    following parts of a plant stems, roots,
    leaves, flowers, and seeds
  • Answer Stem provides
  • support and contains tissues to
  • transport materials to and from
  • other parts of the plant
  • Roots take in water for the plant
  • and anchor the plant
  • Leaves the site of photosynthesis for the plant
  • Flowers produce seeds, attract
  • insects for pollination
  • Seeds produce new plant

110
  • Question Sequence the stages in the life of a
    butterfly and a frog.

111
  • Answer

112
  • Question Explain how plants produce their own
    food.

113
  • Question Explain how plants produce their own
    food.
  • Answer Plants take in energy from the sun and
    produce food to store the energy. This occurs in
    the chloroplasts of plant cells which contain the
    pigment chlorophyll.

114
  • Question What are the raw materials and what
    are the products of photosynthesis?

115
  • Question What are the raw materials and what
    are the products of photosynthesis?
  • Answer In photosynthesis, the following
    occurs
  • Carbon dioxide water glucose oxygen
  • So the products and materials are

Raw Materials Products
Carbon dioxide Water Glucose (sugar) Oxygen
116
  • Question Why are green plants so important to
    an ecosystem?

117
  • Question Why are green plants so important to
    an ecosystem?
  • Answer Green plants are the producers of an
    ecosystem. They make their own food by
    photosynthesis using the suns energy. Consumers
    are animals and they get their energy from the
    producers or from organisms that eat producers.

118
  • Question Describe several adaptive structures
    and explain why they are effective.

119
  • Question Describe several adaptive structures
    and explain why they are effective.
  • Answer Adaptive structures include thick, waxy
    surface on the leaves to slow water loss slits
    in the rim allowing water to drain off razor
    sharp spines or thorns to protect it from
    predators very tall plants competing with one
    another to reach the sunlight vines crawling up
    tree trunks to reach sunlight plants with very
    big leaves to trap sunlight for photosynthesis
    geotropism, or the roots of plants detecting
    gravity to grow downward phototropism, or the
    ability of plants to grow toward the sun

120
  • Question List plant parts that we eat as food
    and identify them as stem, leaf, flower, root,
    seeds, or fruit.

121
  • Question List plant parts that we eat as food
    and identify them as stem, leaf, flower, root,
    seeds, or fruit.
  • Answer

122
  • Question Label the parts of a flower and
    explain the function of each part.

123
  • Question Label the parts of a flower and
    explain the function of each part.
  • Answer

124
  • Question Explain how to grow a potato without a
    seed.

125
  • Question Explain how to grow a potato without a
    seed.
  • Answer  Potatoes can be grown from eyes that
    they produce. Simply cut potatoes into pieces
    making sure each piece contains a prominent bud
    or "eye". Plant potato pieces into the prepared
    soil at 10 to 12 inch spacing.

126
  • Question Compare two methods of plant
    reproduction and explain which method produces a
    new individual and which produces new growth of
    the established individual.

127
  • Question Compare two methods of plant
    reproduction and explain which method produces a
    new individual and which produces new growth of
    the established individual.
  • Answer Plants can be grown from seeds which will
    produce new plants that are different from the
    parents. Plants can also be grown from cuttings
    which produces plants identical to the parent
    plant.

128
  • Question Explain how behavioral adaptations can
    allow animals to be better suited for their
    environment.

129
  • Question Explain how behavioral adaptations can
    allow animals to be better suited for their
    environment.
  • Answer If the animal acts a certain way that
    increases their chances of survival, it is called
    a BEHAVIORAL ADAPTATION. Some animals play dead
    in order to trick predators and when the predator
    slow down its attack, the animal can get away.
    Migration is a behavioral adaptation - without
    it, many animals would freeze to death in the
    winter.

130
  • Question Label a diagram of the respiratory
    system.

131
DAILY DO NOW
  • Question Label a diagram of the respiratory
    system.
  • Answer

SCIENCE GRADE 4
132
  • Question Label a diagram of the circulatory
    system.

133
  • Question Label a diagram
    of the circulatory system.
  • Answer

134
  • Question Find the total number of calories in
    the entire can of carrots based on the
    food label.

135
  • Question Find the origins of
    the ingredients that made up
    the food label.
  • Answer Each can has 2.5
  • servings with each serving
  • having 45 calories.
  • 2.5 x 45 112.5

136
  • Question Use the new USDA food pyramid and
    describe a balanced meal.

137
  • Question Use the new USDA food pyramid and
    describe a balanced meal.
  • Answer A balanced meal is obtained by eating a
    variety of the foods from each of the five food
    groups each day grains, vegetables, fruits,
    dairy, meat and beans

SCIENCE GRADE 4
138
  • Question Explain the bodys need for the
    following nutrients fats, carbohydrates, and
    proteins.

139
  • Question Explain the bodys need for the
    following nutrients fats, carbohydrates, and
    proteins.
  • Answer Carbohydrates give you energy for work
    and play. Fat is used to cushion organs, to
    insulate against heat, and to store energy. Fat
    in the diet provides energy and fat soluble
    vitamins. Protein provides energy, builds
    muscles, builds and repairs cells, and regulates
    bodily functions.

140
  • Question Explain the adaptive behavior of a
    vine climbing up a wall in terms of the
    requirements necessary for photosynthesis.

141
  • Question Explain the adaptive behavior of a
    vine climbing up a wall in terms of the
    requirements necessary for photosynthesis.
  • Answer Some plants can climb
  • up closer to the top of the
  • canopy where there is more
  • light. Some develop tendrils or
  • hook-like structures to hold on
  • to the wall.

142
  • Question Explain the function of the roots,
    leaves, and stem in the process of photosynthesis.

143
  • Question Explain the function of the roots,
    leaves, and stem in the process of
    photosynthesis.
  • Answer
  • Roots- bring in water and minerals from the soil
  • Stem- helps transport water, minerals, food
    through the plant
  • Leaves- place where the plants make glucose
    (food).

144
SCIENCE STRAND
  • SCIENCE OF THE ENVIRONMENT

145
  • Question Discuss how carrying capacity affects
    an ecosystem.

146
  • Question Discuss how carrying capacity affects
    an ecosystem.
  • Answer Carrying capacity is the number of
    individuals an environment can support without
    negative impacts to the ecosystem. An ecosystem's
    carrying capacity is determined by the
    availability of resources such as space,
    nutrients, water and light. Interactions between
    organisms often determine who will be successful
    in obtaining resources and who will survive.

147
  • Question Classify common products as being made
    from renewable or non-renewable resources.

148
  • Question Classify common products as being made
    from renewable or non-renewable resources.
  • Answer Renewable resources include items such as
    wood, paper, oxygen, fresh water, leather, and
    alcohol and oils from plants and seeds that can
    used fuels. Gasoline, coal, natural gas, diesel
    and other products derived from fossil fuels are
    non-renewable. Metal ores are used to produce
    iron, aluminum or copper based products which are
    also non-renewable.

149
  • Question How do human populations alter natural
    habitats?

150
  • Question How do human populations alter natural
    habitats?
  • Answer Human activity causes air and water
    pollution. Building homes, roads and other
    structures also destroy habitats where plants and
    animals live.

151
  • Question Describe several strategies for
    preserving habitats.

152
  • Question Describe several strategies for
    preserving habitats.
  • Answer Areas can be designated as preserves or
    sanctuaries. Guidelines, education, and laws can
    help prevent pollution. Conserving and recycling
    will help save resources and habitats.

153
  • Question Describe several strategies for
    recovering damaged habitats.

154
  • Question Describe several strategies for
    recovering damaged habitats.
  • Answer Allow forests to re-grow clean up
    rivers, lakes and seas and help to protect what
    still remains.

155
  • Question Describe the recovery of an endangered
    species population in Louisiana.

156
  • Question Describe the recovery of an endangered
    species population in Louisiana.
  • Answer The Louisiana Brown Pelican was put on
    the Endangered Species list in 1970. The
    pesticide DDT and habitat loss had almost wiped
    out the pelicans in Louisiana. Conservation
    efforts and the ban of DDT has allowed the
    pelican population to grow and they have just
    been removed from the endangered species list.

157
  • Question Describe the damage an oil spill has
    on a natural habitat and effective clean up
    procedures.

158
  • Question Describe the damage an oil spill has
    on a natural habitat and effective clean up
    procedures.
  • Answer Oil spills can affect all the organisms
    in a food chain. Birds die from oil spills if
    their feathers are covered in oil. The bird can
    be poisoned because it tries to clean itself.
    Animals may die because they get hypothermia,
    causing their body temperature to be too low, or
    they ingest the oil. ?

159
  • Workers can place a boom around the spilled oil
    which collect the oil off the water. The workers
    can also use skimmers. Skimmers are boats that
    can remove the oil off the water. They also can
    burn freshly spilled oil with fireproof booms to
    contain the oil. There are just a few ways to
    clean the oil off the beaches. Workers can use
    high or low pressure hoses to spray the oil that
    is on the beaches. Vacuum trucks may be driven on
    the beaches to vacuum up the oil.

160
  • Question List the living and non-living
    components of a crawfish ecosystem.

161
  • Question List the living and non-living
    components of a crawfish ecosystem.
  • Answer

LIVING NON-LIVING
PLANTS ANIMALS WATER SUNLIGHT TEMPERATURE SOIL, SAND, ROCKS
162
  • Question Describe how producers and consumers
    obtain food.

163
  • Question Describe how producers and consumers
    obtain food.
  • Answer
  • Producers make their own food by photosynthesis.
  • Consumers feed on producers or other consumers.

164
  • Question Classify consumers as herbivores,
    carnivores, omnivores, and decomposers and
    explain the role of each in a food web.

165
  • Question Classify consumers as herbivores,
    carnivores, omnivores, and decomposers and
    explain the role of each in a food web.
  • Answer
  • Herbivores-eat plants cows, zebra, rabbits
  • Carnivores-eat animal flesh lions, tigers,
    sharks
  • Omnivores-eat both plants and animals bears,
    raccoons
  • Decomposers-break down dead plants and animals
  • mushrooms, bacteria

166
  • Question Draw a diagram of a food web.
    Identify the producers and the consumers.

167
  • Question Draw a diagram of a food web. Identify
    the producers
    and the consumers.
  • Answer
  • Producers
  • All the other organisms
  • are consumers.

168
  • Question Explain the difference between a food
    web and a food chain.

169
  • Question Explain the difference between a food
    web and a food chain.
  • Answer Food chains follow a single path as
    animals eat each other. Food webs show how many
    animals are interconnected by different paths.

170
  • Question Where does the energy in a food web
    come from?

171
  • Question Where does the energy in a food web
    come from?
  • Answer Since the plants are the producers for a
    food web, the energy in a food web ultimately
    comes from the sun.

172
  • Question Explain why many Louisiana animals and
    plants are endangered or have become extinct.

173
  • Question Explain why many Louisiana animals and
    plants are endangered or have become extinct.
  • Answer Many animals and plants in Louisiana have
    become endangered or extinct due to habitat loss
    or destruction or over hunting.

174
  • Question Describe methods taken to protect
    wildlife.

175
  • Question Describe methods taken to protect
    wildlife.
  • Answer Wildlife can be protected by forming
    protected areas for them to live in or by
    limiting hunting or ownership of the animals.

176
  • Question Identify an appropriate habitat for
    each organism cypress tree, lion, earthworm.

177
  • Question Identify an appropriate habitat for
    each. organism cypress tree, lion, earthworm.
  • Answer
  • Cypress tree- wetlands
  • Lion- grasslands
  • Earthworm- in the topsoil

178
  • Question Given a number of organisms identify
    an appropriate habitat for each.
  • Cactus
  • Whale
  • Polar bear
  • Alligator
  • Turtle

179
  • Question Given a number of organisms identify
    an appropriate habitat for each.
  • Answer
  • Cactus- desert
  • Whale- ocean
  • Polar bear- Arctic
  • Alligator- wetlands (swamps, marshes)
  • Turtle- streams, rivers, ponds

180
  • Question Give an example of each of the
    following types of organisms herbivores,
    carnivores, decomposers, scavengers, producers,
    consumers.

181
  • Question Give an example of each of the
    following types of organisms herbivores,
    carnivores, decomposers, scavengers, producers,
    consumers.
  • Answer Answers will vary.

182
SCIENCE STRAND
  • SCIENCE OF INQUIRY

183
  • Question Why do scientists repeat experiments?

184
  • Question Why do scientists repeat experiments?
  • Answer Repeated trials serve to validate the
    findings of an experiment.

185
  • Question Select the appropriate tools and units
    of measurement to find mass.

186
  • Question Select the appropriate tools and units
    of measurement to find mass.
  • Answer
  • Tool balance
  • Unit of Measure gram

187
  • Question How would you measure the mass and
    volume of an irregular object like a rock?

188
  • Question How would you measure the mass and
    volume of an irregular object like a rock?
  • Answer The volume of a rock can be measured by
    placing the rock in a container full to the brim
    of water. The overflow will equal the volume of
    the rock.
  • ?

189
  • Question How would you measure the mass and
    volume of an irregular object like a rock?

? Answer The mass of a rock can be measured by
a balance scale. On one side of the balance
place the rock and on the other side of the
balance place a know mass that balances the scale.
SCIENCE GRADE 4
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