Download Study Guide for Unit 2 Test, Energy KEY

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Study Guide for Unit 2 Test, Energy KEY
1.
When the nucleus of an atom changes,
what energy is released?
Nuclear energy
2.
The total energy of the particles within a
substance is
Thermal energy
3.
What is the energy of shape or position?
Potential energy
4.
What is the energy stored in compounds
that changes as the bonds are rearranged
forming new compounds?
Chemical energy
5.
In a nuclear power plant, the large nucleus
Nuclear fission
of a uranium atom is split into two smaller
nuclei to produce a large amount of energy.
The power plant depends on __________ to
operate.
6.
What is the law of conservation of energy?
Energy cannot be created or destroyed.
The amount of energy stays the same.
7.
When the nuclei of atoms are joined
together at very high temperatures,
__________ has occurred.
Nuclear fusion
8.
A hairdryer transforms electrical energy into
sound energy, mechanical energy, and
Thermal energy
9.
A television converts electrical energy into
light energy, sound energy, and
Thermal energy
10. What is the energy of moving electrons?
Electrical energy
11. The energy transmitted in the form of
electromagnetic waves is
Radiant or light energy
12. Vibrations of an object produce
Sound energy
13. The total kinetic energy of particles that
make up an object is
Thermal energy
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14. What is the ability to do work?
Energy
15. What is the energy of motion?
Kinetic energy
16. What is the energy of position or height
above the Earth?
Potential energy
17. What are the SI units for work and energy?
Joules
18. Electrical energy can be used in appliances
if it is ______________ first.
Converted
19. Energy cannot be created or destroyed.
However some energy is lost to the
environment in the form of ________
energy.
Thermal energy
20. How are work and energy related?
The amount of work and energy are
equal. Both are measured in joules.
Work is the transfer of energy and
energy is the ability to do work.
21. Kinetic energy from wind or moving water is
a (nonrenewable or renewable) energy
source.
Renewable
22. Radiant energy from the sun is a
(nonrenewable or renewable) energy
source.
Renewable
23. What is one positive reason for using
nuclear energy?
Generating electricity with no air
pollution
24. What is one negative reason for using
nuclear energy?
Nuclear disasters and long-term health
risks
25. A car parked on a hill is an example of
___________ energy.
Potential energy
26. Food is an example of __________ energy.
Chemical energy
27. A fan is an example of __________ energy.
Mechanical energy
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28. Throwing or kicking a ball and running down
the field is an example of __________
energy.
Kinetic energy
29. Using a stove to boil water is an example of
__________ energy.
Thermal energy
30. Fission or fusion are two examples of
__________ energy.
Nuclear
31. All power plants generate __________
energy.
Electrical
32. Radiant energy from the sun is also
__________ energy.
Light
33. Listening to music at a concert is an
example of __________ energy.
Sound
34. Calculate the potential energy of a 2000 N
boulder balancing on a 200 m high rock
tower.
W = 2000 N
H = 200 m
PE = ?
PE = w x h
PE = 2000 N x 200 m
PE = 400,000 J
35. Calculate the kinetic energy of a 210 kg
scooter moving at 8 m/s.
M = 210 kg
V = 8 m/s
KE = ?
KE = (m * v2) / 2
KE = (210 * 82) / 2
KE = 6720 J
Problem: How does the length of a 2nd class lever affect the input force?
36. ________: If I use the longest lever, then I
will have the lowest input force.
Hypothesis
37. ________: 25 cm lever, 50 cm lever, 75 cm
lever, 100 cm lever, 200 cm lever
Experimental Groups
38. Independent Variable is
Length of levers
39. Dependent Variable is
Input force