2025 Semester 2 Midterm Part 2

1. In which of the following processes is chemical energy converted to mechanical energy?

• photosynthesis
• a rock rolling down a hill
• cellular respiration
• muscle contraction

2. According to the law of conservation of energy, the total amount of energy in the universe

• remains constant
• changes constantly
• increases
• decreases

3. When you are on a swing the potential energy changes to

• chemical
• thermal
• kinetic
• radiant

4. In the picture below in what area of the house is chemical energy transferring to thermal energy?

• A
• B
• C
• D

5. In the picture below what transformation of energy is occurring between the battery and the flashlight?

• nuclear to chemical
• chemical to electrical
• thermal to electrical
• electrical to thermal

6. In the picture below what transformation of energy is occurring between the flashlight and the light bulb (this would be the bulb inside the flashlight which has been removed for the visual).

• light to thermal
• chemical to light
• electrical to light
• thermal to light

7. The sum of the kinetic and potential energy of the particles that make up an object is called

• electrical energy
• chemical energy
• nuclear energy
• thermal energy

8. Choose a form of energy into which electrical energy is converted to in a radio

• thermal
• chemical
• light
• sound

9. Choose a form of energy into which electrical energy is converted to in a fan

• nuclear
• mechanical
• chemical
• light

10. Choose a form of energy into which electrical energy is converted to in a space heater

• thermal
• chemical
• light
• sound