Across
- 4. - A huge group of stars, planets, and dust held together by gravity.
- 5. - A push or pull that can change the motion of an object.
- 7. - A curved piece of glass or plastic that bends light.
- 8. - A set of instructions followed by a computer to solve problems.
- 14. - What force pulls objects toward the Earth?
- 15. - A nerve cell that transmits information in the body.
Down
- 1. - The tiny dots that make up images on a screen.
- 2. - An event when one celestial body blocks the light from another
- 3. - A popular programming language named after a snake.
- 6. - The science of substances and how they change
- 9. - A robot sent to explore other planets.
- 10. - Relating to heat or temperature.
- 11. - What object attracts iron and can stick to your fridge?
- 12. - A device that stores energy to power electronic gadgets.
- 13. - The branch of science that studies living things.