| A | B |
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| According to the law of conservation of energy, what can be said about the total amount of energy in the universe? | Energy has been neiher gained nor lost; has remained the same |
| A student observes a charcoal fire in a barbecue pit. In the pit are lava rocks and a metal grill. Of the items in the pit, which is a conversion from chemical energy to thermal energy? | Lava rock |
| In every energy conversion, some energy is always converted into what type of energy? | Thermal |
| The chemical energy in the food we eat was originally in another form and was converted. What type of sun's energy conversion occurred in order to have chemical energy stored in food? | Energy (radiant) to chemical through photosynthesis |
| Fossil fuels such as oil and coal originally received their energy from what type of energy conversion? | Sun (radiant) |
| An electric generator is useful after a hurricane because it can generate electricity. What is a generator doing when it generates electricity? | Chemical energy to electrical |
| When you turn on a light bulb, what type of energy are you converting? | Electrical to light and thermal |
| Wat type of energy stored in the sugars and starches provide the thermal energy that keeps your body temperature constant? | Chemical |
| A student is given a rock, a gas heater, a microphone and a battery. Which one of those objects converts sound energy to electrical energy? | Microphone |
| Which type of energy do more efficient light bulbs produce? | More light energy than thermal |
| Imagine that you drop a ball. It bounces a few times, but then it stops. Your friend says that the ball has lost all of its energy. What law would you use to explain that your friend was wrong? | Law of conservation of energy |
| A student takes a basketball and throws it straight up in the air. The ball falls back down and lands exactly in the student's hands. Neglecting frictional forces, what can be said about the amount of energy when the basketball falls back in the student's hands? | Been lost or gained |
| After energy conversion, you end up with the same total amount of energy as the original amount of potential energy. Which law explains this rule? | Law of conservation of energy |
| When you put on the brakes of a bicycle, friction causes some of the mechanical energy to change into what type of energy? | Thermal |
| Energy stored in food you eat is what type of energy? | Chemical |
| How does a solar collecor become heated? | Absorbing the sun's energy on a dark surface which warms the water |
| A student observes several items in her house. She sees an upright piano, a radio, a toaster, and a digital camer. Which device does not make use of electrical energy? | Uprigh Piano |
| Muscles perform what type of energy transformation? | Chemical energy to kinetic |
| How do most power plants generate electricity? | Generators |
| How does a solar powered calculator work? | Light energy |
