Tides

2. any star around which planets revolve
7. relating to water
8. having to do with the ocean
9. a group of organisms that share similar characteristics and can mate with each other to produce offspring
12. a situation in which water has flowed over the edges of a river; (v) to overflow
14. the movement of air due to atmospheric pressure differences
15. a body in outer space that orbits a planet; a natural satellite
17. a force that exists between any two objects that have mass
18. the top of an object; the outside of an object; the boundary between two objects or materials
20. the ability to do work or cause change; the ability to move an object some distance

1. to guess what will happen in the future
2. the large, empty part of the universe that does not contain any matter
3. a large body of salt water that covers most of Earth
4. the rise and fall of the ocean's surface levels due to the gravitational pull of the sun and moon
5. a disturbance caused by a vibration; Waves travel away from the source that makes them.
6. a compound made of hydrogen and oxygen
10. an animal that hunts and eats another animal
11. a type of tide that occurs when the sun, moon, and Earth are in a straight line; alignment and gravity from the moon and the sun pull the water in the same direction
13. having to do with the moon or moon cycles
16. the amount of matter in an object
19. a pull or push that is applied to an object