P8.3 - Space - Crossword Labs

3. The amount of matter in an object, measured in kilograms (kg).
4. The force of gravity acting on an object, measured in newtons (N).
7. The force that pulls objects towards each other.
8. A massive ball of hot gas that produces light and heat (e.g. the Sun).
9. The Sun and all objects that orbit it, including planets and moons.
12. A huge collection of stars, planets, gas, and dust held together by gravity.
13. The spinning of a planet on its axis.
15. The line around the middle of Earth that receives fairly constant sunlight.
16. The angle of Earth’s axis (about 23.5°), which causes seasons.

1. A large object that orbits a star and does not produce its own light.
2. A unit of distance showing how far light travels in one year.
5. A large planet made mostly of gases (e.g. Saturn, Jupiter).
6. An imaginary line that a planet rotates around.
9. Changes in weather caused by Earth’s tilted axis as it orbits the Sun.
10. The movement of a planet around a star.
11. A natural satellite that orbits a planet.
14. One half of the Earth (Northern or Southern).
17. The path an object takes as it moves around another object (e.g. planets around the Sun).