Unit 7: Energy

1. The ability to do work can be described as

• force
• motion
• energy
• gravity

2. What kinds of energy does a toaster convert electrical energy?

• solar and chemical
• heat and chemical
• light and atomic

3. A light bulb is turned on. It produces light and warms up. Which statement is true?

• Some of the electrical energy is transformed to light energy and some is destroyed
• All the electrical energy is transformed to light energy.
• All the electrical energy is transformed to light energy and heat energy.
• All the electrical energy is transformed to heat energy.

Use the diagram below for questions 4-6. 4. Between steps 3 and 4, the energy in the steam is converted to ____ as seen by the turbine spinning

• mechanical energy
• heat energy
• nuclear energy
• electrical energy

5. Between steps 4 and 5, the energy of the spinning turbine is converted to ___ at the powerlines

• electrical energy
• nuclear energy
• heat energy
• mechanical energy

6. Between steps 1 and 2, the energy from the sun is converted to ______ in the coal

• nuclear energy
• mechanical energy
• chemical energy
• electrical energy

7. Where does the skier have the most potential energy?

• A
• B
• C

8. Whenever an energy conversion occurs, some energy is always converted into _____________ energy

• chemical energy
• nuclear energy
• light energy
• thermal energy

9. Maya is playing the guitar. She strums the strings and the guitar produces noise. Maya is transforming _______ energy into _______ energy

• electrical; sound
• electrical; mechanical
• mechanical; light
• mechanical; sound

10. A rock lying on the ground, a book on a desk and a glass of milk all have what type of energy?

• potential energy
• kinetic energy
• sound energy