Across
- 6. The visible surface of the sun.
- 7. A branch of mathematics using letters and symbols to represent numbers.
- 9. Horizontal lines that measure distance north or south of the equator.
- 10. A force that slows or stops motion when two objects rub together.
Down
- 1. The movement of water through a semi-permeable membrane.
- 2. A figure of speech that compares two things without using "like" or "as."
- 3. A system of government where the people have the power to vote.
- 4. A complete orbit of a planet around the sun.
- 5. The force of attraction or repulsion between certain materials like iron.
- 8. A watercraft that travels under the sea.