5.6A SW explore the uses of energy, including mechanical, light, thermal, electrical and sound energy. - PowerPoint PPT Presentation

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5.6A SW explore the uses of energy, including mechanical, light, thermal, electrical and sound energy.

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Matter and Energy. 5.5A,B.C,D Classify matter based on physical properties, including mass, magnetism, physical state, relative density (sinking and floating ... – PowerPoint PPT presentation

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Title: 5.6A SW explore the uses of energy, including mechanical, light, thermal, electrical and sound energy.


1
5.6A SW explore the uses of energy, including
mechanical, light, thermal, electrical and sound
energy.
2
Forms of Energy -Wind is moving air. We can use
the energy in wind to do work. The energy in wind
comes from the sun. -When the wind blows,
it pushes against the blades of the wind
turbines. -The blades spin around and turn a
generator that makes electricity. -This
electrical energy travels to your house. Wind
energy only makes a little bit of the electricity
we use in the U.S.
3
Heat Energy
-Heat is a form of energy. Heat energy depends
on the temperature of matter. As matter heats up
its molecules vibrate faster. A thermometer
measures heat energy. -We use heat, called
thermal energy everyday. There is a rule of heat
flowHeat always moves from a hotter object to a
cooler object. -Energy cannot be created or
destroyed. The same amount of energy exists
before and after it changes form. EX Wind
Mechanical Electrical Heat
Iron clothes
4
  • Sound Energy
  • -Sound is a form of energy created when an object
    vibrates.
  • A tuning fork emits sound when it vibrates.
  • -When a drummer plays a drum, the drumhead
    vibrates and creates sound waves.

5
-Sound waves cannot exist in outer space. They
must pass through a medium. A medium is a solid,
liquid or gas.
-Sound waves travel faster through a solid than a
liquid. It travels faster through a liquid than
through a gas. Sound travels the slowest through
air.
6
-Sound energy helps us communicate with our
friends, listen to music, and watch
television.
7
Light Energy -Light is a form of energy that
travels in waves.
8
Light travels in straight lines unless it hits
another object.
9
-Light is produced when one form of energy is
changed to light energy. -The source might be a
candle, a light bulb, a fire, or the sun.

10
Mechanical Energy -There are two forms of
mechanical energy Kinetic energy-the energy of
motion Potential energy-stored energy -A roller
coaster at the top of the hill has potential
energy. -As the car moves downhill,
potential energy changes to kinetic energy.
11
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12
Forms of Energy
13
Electrical Energy-Circuits 5.6B SW demonstrate
that the flow of electricity in circuits requires
a complete path through which an electric current
can pass and can produce light, heat an
sound -Electricity-is a form of energy that is
produced when electrons move from one place to
another -The constant flow of electrons
is called an electric current.
14
-Materials that allow electricity to move through
them easily are called Conductors. -Copper is a
very good conductor of electricity. Thats why
electrical wires are made of copper. -Materia
ls that resist the flow of electricity are called
insulators. -Rubber and plastic resist the flow
of electricity. That makes them good insulators.
15
Electric circuit-is a pathway that electrons flow
through. Electric circuits allow electrical
energy to be changed into other forms of energy.
16
Closed circuit-the switch is in the ON position.
Think of the switch as a drawbridge. When it is
in the down position, electrons can flow across
the bridge from one wire to the other wire. The
bulb lights.
17
Open circuit-the switch is in the OFF position.
Electrons cant flow from one wire to the other
wire . The bulb turns off.
18
Light Energy-Reflection and Refraction 5.6C SW
demonstrate that light travels in a straight line
until it strikes an object or travels through one
medium to another and demonstrate that light can
be reflected such as the use of mirrors or other
shiny surfaces and refracted such as the
appearance of an object when observed through
water Light Energy is a form of energy that
travels in waves. It can come from a light bulb,
the sun, or a computer screen. No matter what
the source it is, light travels in a straight
line.
19
Light Energy Terms Reflection-The bouncing of
light from a surface. Light travels in
straight lines unless it hits another surface.
Then it reflects in angles.
20
Refraction-the bending of light as it moves from
one material into another.
21
Convex lens- a lens that is thicker in the center
and thinner at the edges. This shape bends light
rays inward. Concave lens-is a lens that is
thinner in the center and thicker at the edges.
This shape bends light outward.
22
Transmit-means that light passes through an
object. Light can pass through a transparent
window or something that is translucent.
23
Transparent-allows light to be transmitted or to
pass through Translucent- allows some light
to be transmitted or to pass through Opaque-do
es not allow any light to be transmitted or to
pass through Absorb- means the light is taken
in by the object
24
Matter and Energy 5.5A,B.C,D Classify matter
based on physical properties, including mass,
magnetism, physical state, relative density
(sinking and floating), solubility in water, and
the ability to conduct or insulate thermal energy
or electric energy. Identify the boiling,
freezing, and melting points of water on the
Celsius scale ,demonstrate that some mixtures
maintain their physical properties and identify
changes that occur in the physical properties of
solutions such as dissolving salt in water or
adding lemon juice to water
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