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ENERGY

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Energy transformations occur in energy production (as in conversions of energy for use in everyday life) ... – PowerPoint PPT presentation

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Title: ENERGY


1
ENERGY
2
Energy is the ability to cause change
WHAT IS LIGHT ENERGY? 5 POINTS WHAT IS THERMAL ENERGY? 5 POINTS
WHAT IS CHEMICAL ENERGY? 5 POINTS WHAT IS ELECTRICAL ENERGY? 5 POINTS
3
ANSWERS
Light Energy radiant energy. Travels at a speed of 300,000 km/s Thermal Energy energy due to molecular movement within an object. Increased temperature increased thermal energy
Chemical Energy energy stored in chemical bonds. When chemicals are broken apart and new molecules are formed, energy is released Electrical Energy energy of electrons moving along a path (electrical current)
4
Energy is the ability to cause change
WHAT IS NUCLEAR ENERGY? 5 POINTS WHAT IS POTENTIAL ENERGY? 5 POINTS
WHAT IS KINETIC ENERGY? 5 POINTS HOW IS NUCLEAR ENERGY RELEASED? 5 POINTS
5
ANSWERS
Nuclear Energy energy stored in the nucleus of an atom Potential Energy energy an object has because of its position
Kinetic Energy energy of a motion. Only a moving object has kinetic energy. Amount of energy depends on speed and mass Nuclear Fission as soon as the nucleus splits into 2 lighter atoms and throws off 2-3 new neutrons. The 2 new neutrons then emit gamma radiation and the ejected neutrons hit other uranium nuclei causing a chain reaction
6
Energy is the ability to cause change
HOW DO ENERGY TRANSFORMATIONS OCCUR? 10 POINTS HOW DOES MASS AND SPEED OF AN OBJECT RELATE TO KINETIC ENERGY? 10 POINTS
7
ANSWERS
An energy transformation occurs when energy changes from one form to another. Energy transformations occur in energy production (as in conversions of energy for use in everyday life). Potential Energy is the energy that is stored because of an objects position. The energy of an object due to its motion is called Kinetic Energy. The amount of kinetic energy also depends on the mass and the speed of an object. Kinetic energy increases as speed increases. The faster an object moves, the more kinetic energy it has.
8
  • Windmill farms are becoming a popular method
    of generating electricity for some communities.
    What form of energy in wind is used to turn the
    giant blades of the windmill?
  • Chemical
  • Mechanical
  • Electrical
  • Thermal

20 POINTS
9
The correct answer is B, Mechanical Energy.
Wind, which turns the windmill blades, is the
movement of air particles.
10
In a nuclear reactor, the energy used to turn
water into steam is in what form? A. Chemical B.
Nuclear C. Electrical D. Thermal
20 POINTS
11
The correct answer is D, thermal energy. The
nucleus of the uranium atom contains nuclear
energy, but this is converted into thermal energy
when the nucleus is split. The thermal energy is
then used to heat the water to the boiling point.
12
Nutrients entering muscle cells in the body are
converted into heat. What form of energy is
stored in the nutrients?
A. Chemical B. Nuclear C. Electrical D. Thermal
20 POINTS
13
The correct answer is A, chemical energy.
Chemical energy is stored in the chemical bonds
of the food molecules.
14
The boulder would have the greatest kinetic
energy at which of the positions on the waterfall?
QUESTION
A position 1 B position 2 C position 3 D
position 4
1
A
4
2
B
3
20 POINTS
15
B position 2
16
A yo-yo can demonstrate both Potential and
Kinetic energy. When does a yo-yo have it
greatest potential energy?
A In the hand before the yo-yo is
releasedB At the bottom of the stringC When
the yo-yo is fallingD When the yo-yo is
climbing the string
20 POINTS
17
A In the hand before the yo-yo is released.
18
Which will have the most kinetic energy rolling
down the hill?
A TruckB BallC RunnerD All of the are
examples of Potential energy.
20 POINTS
19
Answer A
20
Which of the following can be used to transform
chemical energy into heat energy?
A. melting a candle
B. lighting a match
C. solar panels
D. a light bulb
20 POINTS
21
Answer B
22
Which of these types of energy conversions occurs
in a battery-powered flashlight?
A. Thermal to mechanical
B. Light to electrical
C. Thermal to chemical
D. Chemical to electrical
20 POINTS
23
Answer D
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