Question

forms of energy and energy transformations practice
lt. i can identify and describe the different forms of potential and kinetic energy.
lt. i can give/explain examples of energy transformations.
potential and kinetic energy
identify each of the following forms of energy as either potential energy (p) or kinetic energy (k).
__ sound nuclear elastic __ electric
__ chemical gravitational thermal __ electromagnetic
a. choose one of the above forms of potential energy and describe why it fits in this category.
b. choose one of the above forms of kinetic energy and describe why it fits in this category.
forms of energy
match the energy form(s) to the description provided. questions may have more than one answer. pick the form(s) of energy most clearly demonstrated.
____1. a boulder resting at the top of a hill a. translational motion
____2. release of energy from the sun b. electric
____3. a coiled spring c. electromagnetic (radiant)
____4. batteries not in use d. chemical
____5. the energy that runs a refrigerator e. nuclear
____6. nuclear fission reactors f. sound
____7. the rumble of thunder from a storm g. elastic
____8. rubbing your hands together h. gravitational
____9. gasoline stored in a tank i. rotational motion
____10. food before it is eaten j. thermal (heat)
____11. a guitar string vibrating
____12. a top spinning
____13. sledding down a hill
____14. candle burning
____15. a taut rubber band (fully stretched)

Explanation:

1. A boulder at the top of a hill has gravitational potential energy as it has the potential to fall due to gravity.
2. The Sun releases energy via nuclear fusion (nuclear energy) which is then radiated as electromagnetic energy.
3. A coiled spring stores elastic potential energy.
4. Batteries not in use have chemical potential energy.
5. A refrigerator runs on electric energy.
6. Nuclear fission reactors use nuclear energy.
7. Thunder is sound energy.
8. Rubbing hands creates thermal (heat) energy due to friction.
9. Gasoline in a tank has chemical potential energy.
10. Food before being eaten has chemical potential energy.
11. A vibrating guitar string produces sound energy.
12. A spinning top has rotational motion (kinetic energy).
13. Sledding down a hill involves translational motion (kinetic energy).
14. A burning candle releases chemical energy (as it burns fuel) and thermal/electromagnetic (light) energy.
15. A taut rubber - band has elastic potential energy.

Answer:

1. h. Gravitational
2. e. Nuclear, c. Electromagnetic (radiant)
3. g. Elastic
4. d. Chemical
5. b. Electric
6. e. Nuclear
7. f. Sound
8. j. Thermal (heat)
9. d. Chemical
10. d. Chemical
11. f. Sound
12. i. Rotational motion
13. a. Translational motion
14. d. Chemical, j. Thermal (heat), c. Electromagnetic (radiant)
15. g. Elastic