Download 8th grade Per.5 Ch5 directed_reading_b

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Skills Worksheet
Directed Reading B
Section: What Is Energy?
ENERGY AND WORK: WORKING TOGETHER
Circle the letter of the best answer for each question.
1. What is the ability to do work called?
a. movement
b. energy
c. power
d. force
KINETIC ENERGY
2. What is the energy of motion called?
a. potential energy
b. mechanical energy
c. kinetic energy
d. force energy
Kinetic Energy Depends on Mass and Speed
3. In the formula for kinetic energy, what does the m stand for?
a. measurement
b. mechanical energy
c. mass
d. meter
4. When a moving object has a greater mass, what happens to its kinetic
energy?
a. Its kinetic energy becomes greater.
b. Its kinetic energy becomes less.
c. Its kinetic energy stays the same.
d. Its kinetic energy stays the same and then becomes less.
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Energy and Energy Resources
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Directed Reading B continued
Circle the letter of the best answer for each question.
5. Speed has the greatest effect on which of the following types of energy?
a. kinetic energy
b. mechanical energy
c. potential energy
d. force energy
POTENTIAL ENERGY
6. The energy an object has because of its position is called what?
a. mechanical energy
b. potential energy
c. kinetic energy
d. thermal energy
Gravitational Potential Energy
7. When you use force to lift an object, what are you giving the object?
a. mechanical energy
b. wind energy
c. gravitational potential energy
d. thermal energy
Calculating Gravitational Potential Energy
8. The amount of gravitational potential energy that an object has depends on
what?
a. the object’s height and circumference
b. the object’s weight and height
c. the object’s weight and energy
d. the object’s height and energy
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Energy and Energy Resources
Name ______________________________ Class___________________Date__________________
Directed Reading B continued
Circle the letter of the best answer for each question.
9. Which of the following is the formula for gravitational potential energy?
a. gravitational potential energy = kinetic energy ÷ potential energy
b. gravitational potential energy = kinetic energy × potential energy
c. gravitational potential energy = weight ÷ height
d. gravitational potential energy = weight × height
Height Above What?
10. If an egg is sitting on a kitchen counter, what would you measure to
determine its gravitational potential energy?
a. the egg’s height from the ceiling
b. the egg’s kinetic energy
c. the egg’s length
d. the egg’s height from the floor
MECHANICAL ENERGY
11. What is the total energy of motion and position of an object called?
a. potential energy
b. gravitational potential energy
c. mechanical energy
d. kinetic energy
12. Which of the following is the formula for finding mechanical energy?
a. mechanical energy = potential energy + kinetic energy
b. mechanical energy = potential energy × kinetic energy
c. mechanical energy = potential energy + gravitational potential energy
d. mechanical energy = potential energy × gravitational potential energy
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Energy and Energy Resources
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Directed Reading B continued
Mechanical Energy in a Juggler’s Pin
Circle the letter of the best answer for the question.
13. When the juggler moves the pin, what kind of energy is moved to the pin?
a. potential energy
b. kinetic energy
c. mechanical energy
d. gravitational potential energy
OTHER FORMS OF ENERGY
Thermal Energy
14. How do particles move at higher temperatures compared with how they
move at lower temperatures?
a. They move slower at higher temperatures.
b. They move faster at higher temperatures.
c. They move at the same speed at all temperatures.
d. They move in circles at higher temperatures.
Chemical Energy
Read the description. Then, draw a line from the dot next to each
description to the matching word.
15. all of the kinetic energy due to
random motion of the particles that
make up an object
16. energy of a compound that changes
as its atoms are rearranged
17. energy of moving electrons
•
•
•
a. chemical energy
b. thermal energy
c. electrical energy
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Energy and Energy Resources
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Directed Reading B continued
Sound Energy
Read the description. Then, draw a line from the dot next to each
description to the matching word.
18. energy that comes from changes in
the nucleus of an atom
19. energy produced by the vibrations
of electrically charged particles
20. energy caused by an object’s
vibrations
•
•
•
a. light energy
b. nuclear energy
c. sound energy
Read the words. Read the sentences. Fill in each blank with the word or
phrase that best completes the sentence.
fission
fusion
21. A nuclear reaction called ______________________ produces the sun’s
light and heat.
22. The electrical energy at nuclear power plants is made by
______________________ .
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Energy and Energy Resources