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JAN – PIONEER SCIENCE
Section 1
Read each question carefully. Choose the most suitable answer.
1. What is energy?
A. Energy is anything that has mass.
B. Energy is the ability to do work or to cause change.
C. Energy is the amount of food the body needs to keep functioning.
D. Energy is a set of things working together as parts of a mechanism.
2. The following is true about energy, except:
I.
Energy comes in multiple forms.
II.
Energy can be created and destroyed.
III.
Energy can be converted from one form to another.
IV.
Heat is not a form of energy.
A.
B.
C.
D.
I and IV.
II and III.
I, II and III.
II, III and IV.
3.
What type of energy is derived from heated groundwater?
A. nuclear energy.
B. hydroelectric energy.
C. geothermal energy.
D. electrical energy.
4.
Jen and her friends have gone camping. She uses a matchstick to start a bonfire. As
the fire burns, which two forms of energy are released?
A. light and chemical
B. light and thermal
C. thermal and electrical
D. electrical and chemical
Section 2
Answer the questions in the spaces provided.
The picture below is of a hot cup of coffee. Answer the questions based on the picture.
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5. a. What energy does the hot coffee have?
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b. How do we measure the energy in question a.?
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c. How does the temperature of the coffee affect the amount of energy the coffee
molecules have?
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d. Tina pours some cold milk into her coffee. What happens to the coffee? Explain.
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Answer Key
Section 1
1. B. Energy is the ability to do work or to cause change.
Tip: We use energy to do work and make all movements. When we eat, our bodies
transform the food into energy to do work. When we run or walk or do some work, we ‘burn’
energy in our bodies.
2. C. I, II and III.
Tip: Energy comes in six forms: chemical energy, electrical energy, radiant energy,
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mechanical energy, nuclear energy and thermal energy. These six forms of energy
are all related. Each form can be converted or changed into the other forms.
3. C. geothermal energy.
Tip: Geothermal energy is made inside the Earth. A geothermal power plant works
by tapping into steam or hot water reservoirs underground; the heat is used to
drive an electrical generator.
4. B. Light and thermal energy.
Tip: Fire converts chemical energy to light energy and thermal energy.
Section 2
5. a. Thermal or heat energy.
b. Temperature is the measure of how much thermal energy something has.
c. The higher the temperature of the coffee, the faster the molecules move around or
vibrate. This means the coffee molecules have more kinetic and potential energy.
d. The energy from the hot coffee is transferred to the particles of the cold milk.
Hence, the cup of coffee becomes cooler as it has lost thermal energy to the milk.
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