Chapter 15 Flash Cards
Answers
1. List four examples of nonrenewable
energy resources.
Coal
Oil
Natural Gas
Uranium
2. The energy of motion is
Kinetic Energy
called ___________.
Energy
3. Work is a transfer of _________.
4. Name two factors that affect the
kinetic energy of an object.
Mass
Speed
5. Give three examples of an object
with elastic potential energy.
A stretched rubber band
A wind-up toy
A bouncing basket ball
6. State the law of conservation of
energy.
Energy can not be created or destroyed but
only changed from one form to another.
7. Walking converts what type of
energy into mechanical energy?
Chemical
8. The mechanical energy of an object
kinetic
equals its ___________energy
plus
potential
____________
energy.
9. A 5-kilogram box is sitting on top of
a bookshelf that is 2 meters high. What
is the box’s gravitational potential
energy?
PE = mgh
PE = (5kg)(9.8m/s2)(2m)
PE = 98 Joules
10.The energy stored in gasoline
chemical energy.
is ________
11. A 40-kilogram boy is running at a
speed of 3 m/s. What is the boy’s
kinetic energy?
KE = 1/2mv2
KE = (0.5)(40kg)(3m/s)2
KE = 180 Joules
9 m2/s2
12.Why is the gravitational potential
energy of an object 1 meter above the
moon’s surface less than its potential
energy 1 meter above Earth’s surface?
The moon has less gravity to pull down on
the object.
13. A drawback of solar energy is that
climate
its usefulness depends on the _______.
14.The potential energy of the
pendulum bob increases the most
E
between locations C and ______.
thermal
15.When an object’s ________
energy
increases, it becomes warmer.
16. A benefit of a hydrogen fuel cell is
water
that its only byproduct is ________.
17. Solar cells convert what type of
energy into electrical energy?
Electromagnetic (light)
18. What three factors affect an object’s
gravitational potential energy?
Mass
Gravity
Height
19. Energy and work are measured in
Joule
the SI unit called the _________.
20. Turning off unused lights or
appliances is an example of energy
conservation
____________.