Science

4. A push or pull that can change an object’s motion.
6. The bouncing back of light or sound waves from a surface.
8. The bending of light as it passes from one material to another, like light bending when it enters water.
9. A change in an organism or species that makes it better suited to its environment.
10. A combination of two or more substances that are not chemically bonded, like sand and water.
13. The force that opposes motion between two objects in contact with each other.
14. A complete, unbroken path through which electric current can flow.
15. A community of organisms interacting with each other and their environment.
16. The process by which liquid water changes into water vapor due to heat.
17. Any living thing, such as a plant, animal, or microorganism.

1. The process by which water vapor cools and changes into liquid water.
2. Anything that has mass and takes up space.
3. The natural environment where an organism lives.
5. Any form of water, such as rain, snow, sleet, or hail, that falls from the sky.
7. A device that stores chemical energy and converts it into electrical energy.
11. The ability to do work or cause change. It can exist in different forms, such as light, heat, and motion.
12. The force that pulls objects toward the center of the Earth (or any other large object).