Page 48 - Science Course 2 (Book 2)

Mo9-L1: Key Concept Organizer

Direction: On each line, write the term or phrase that correctly completes each sentence.

1. is the transfer of energy that occurs when a force makes an object or a particle move.

2. If you are not moving an object, you doing work.

3. If you push a wagon with a force of 35 N, you do work than if you push a
wagon with a force of 10 N.

4. A man lifts a box from the f oor 12 m above the f oor using a force of 40 N. He
is doing of work.

5. A student pulls his or her trumpet out of its case to begin playing it. The student pulls the instrument
upward 1.75 m with a force of 25 N. He or she does on the instrument.

6. The direction of friction is in the direction of the motion.

7. When thermal energy moves from a region of higher temperature to a region of lower temperature, the
energy is called .

8. Scientists sometimes call this heat energy, because it is not easily used
to accomplish tasks.

Mo9-L1: Key Concept Check

Direction: On the line before each def nition, write the letter of the term that matches it correctly. Some
terms will be used more than once.

1. This occurs when energy is converted from one form to another. A. law of conservation
of energy
2. This is the transfer of energy that occurs when a force makes an
object or a particle move. B. energy
transformation
3. This only occurs while the force is acting on the object.
C. work
4. This is the idea that energy can be transformed from one form to
another, but it cannot be created or destroyed.

5. When you ride a roller coaster, your gravitational potential energy
is transformed to kinetic energy and back to gravitational potential
energy.

6. Even though energy can change forms, the total amount of energy
in the universe does not change.

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