Answers to Science Test Review

The whole test is short answer, like this review.
1. What is the difference between kinetic and potential energy?
Kinetic energy is energy in motion, potential energy is possible energy.
2. What has more potential energy: a book on a shelf, or a book falling down?
A book on a shelf.
3. What is energy?
The ability to change matter.
4. If you throw a baseball, where does the ball's kinetic energy come from?
Your arm
5. What kind of energy do we get from the sun?
Solar Energy
6. What is mechanical energy?
The combination of both kinetic and potential energy
7. What is chemical energy?
The energy released during a chemical reaction
8. Where do we get electrical energy?
From moving electrons inside atoms.
9. What is the difference between light from the sun and heat from a light bulb?
Light from the sun is solar energy, but light from a light bulb is electrical energy turned into light.
10. In our experiment, why did the butter melt?
Because the heat from the water was transferred to the knife.
11. What is an conductor?
An object that transfers energy, especially heat or electrical energy
12. What is a better insulator, a person or a textbook?
A textbook
13. What is the difference between convection and conduction?
Convection is heat transferred through air or liquid, conduction is heat transferred directly through objects.
14. What is a fossil fuel? A nonrenewable resource like oil, coal, or natural gas, that comes from ancient animals and plants that were buried for millions of years. The stored solar energy inside the plants and animals turned into fuel.
15. What is a renewable resource? A resource we can replace in a human lifetime, like plants, animals, solar energy, wind energy, and water energy.
16. What is a nonrenewable resource? A resource we cannot replace in a human lifetime.
17. What is conservation?
Protecting and saving natural resources, and using as little as possible of what we need.
18. How can people use renewable resources like wind, water, and solar energy?
We can use wind to power windmills that make electricity, we can use falling water to make energy, and we can collect solar energy to use as electricity.