Energy
Complete the following sentences by filling in the appropriate word or phrase from the list below.
energy potential natural gas created radiant
kinetic destroyed joule chemical
1. _______ is the capacity to do work or to produce heat.
2. Sunlight is an example of _______ energy.
3. The gasoline in your car is an example of _______ energy.
4. The SI unit of energy is the _______.
5. The law of conservation of energy states that in any process, energy is neither _______ nor _______.
6. The three main fossil fuels that supply 90 percent of our energy requirements are coal, petroleum, and _______.
7. _______ energy is the energy of motion.
Match each energy-requiring process with the correct energy transformation it involves. Write the letter on the line.
_____ 8. burning gas to drive a car a. electrical to mechanical
_____ 9. friction b. light to chemical
_____ 10. photosynthesis c. mechanical to heat
_____ 11. electric mixer d. chemical to electrical to light
_____ 12. steam turbine making electricity e. thermal to mechanical to electrical
_____ 13. flashlight f. chemical to thermal to mechanical
Perform the following calculations. Show all your work.
14. Convert 5.42 calories to joules.
15. Convert 726.030 calories to kilojoules.
16. Convert 60.5 J to calories.
17. Convert 1.53 kJ to J
18. Convert 453.7 J to kJ