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Energy and Energy Resources

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Chapter 9

CRCT Preparation


CRCT PreparationChapter 9

1. The objects in the table are all on shelves in a bookcase. Which of the objects is located on the highest shelf?

A the book

B the plate

C the framed picture

D the statue


Chapter 9 CRCT Preparation

1. The objects in the table are all on shelves in a bookcase. Which of the objects is located on the highest shelf?

A the book

B the plate

C the framed picture

D the statue


2. Which of the following describes how energy is converted when a cat knocks a plant off of a counter?

A The gravitational potential energy of the cat is converted into kinetic energy.

B The kinetic energy of the cat is converted into gravitational potential energy.

C The gravitational potential energy of the plant is converted into kinetic energy.

D The kinetic energy of the plant is converted into gravitational potential energy.



3. Which of the following is true of a closed system?

A Energy can be destroyed, but cannot be created.

B Energy can be created, but cannot be destroyed.

C The total amount of energy in the system stays the same.

D The system’s kinetic energy must equal its potential energy.



4. Laboratory investigations show that when two cars traveling at the same speed have a head-on collision, the smaller car experiences more damage. Which of the following is a reasonable explanation for that fact?

A The larger car has more potential energy than the smaller car does.

B Mass has a greater effect on kinetic energy than speed does.

C The larger car experiences more friction than the smaller car does.

D The larger car has more kinetic energy than the smaller car does.



5. What is the kinetic energy of a 30 kg greyhound that is running at a speed of 17 m/s?

A 255 J

B 510 J

C 4,335 J

D 8,670 J




6. Melissa made the sketches above to record everyday examples of types of energy. Which sketch shows kinetic energy?

A 1 only

B 2 only

C 3 only

D 1 and 2 only


7. Which of the following describes how energy is converted when a toaster toasts bread?

A Electrical energy is converted into thermal energy.

B Thermal energy is converted into light energy.

C Light energy is converted into electrical energy.

D Electrical energy is converted into chemical energy.



8. Which situation describes a conversion from kinetic energy into potential energy?

A An apple falls from a tree.

B A duck moves through the water.

C A rubber band is wrapped around stalks of broccoli.

D A can rolls along the floor.



9. Tyrone went camping at Fort Mountain State Park in Chatsworth, Georgia. He got up early one morning to bike the trails in the park. After a big breakfast, Tyrone headed out on his bicycle ride. His bike’s headlight was powered by his pedaling. Describe two ways in which energy was converted from one form into another.



9. Answer - Full-credit answers should include two energy conversions that would take place during the operation of the bicycle. Answers may include:

• The chemical energy in Tyrone’s breakfast was converted into kinetic energy as he pedaled the bike.

• The kinetic energy of the turning pedals was converted into thermal energy as a result of friction with the chain.

• The kinetic energy of the turning wheels was converted into light energy as the headlight turned on.



10. Meredith fills a teapot with water and puts it on the stove. She turns the gas burner on and waits for the water to boil. When the water is boiling, Meredith pours it into a cup with a teabag in it. She drinks the tea after it has cooled slightly. Describe three transfers of thermal energy in this example.




10. Answers may include:

• Thermal energy that is converted from chemical energy in the gas is transferred to the teapot.

• The thermal energy in the teapot is transferred to the water particles in the teapot.

• Some of the thermal energy is transferred to the air surrounding the teapot and the cup.

• Some of the thermal energy in the tea is transferred to Meredith as she drinks the tea.

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