Across
- 2. system A star and all the objects that orbit around it.
- 3. To send out a signal, such as a radio or television program.
- 4. A large marine mammal that breathes air.
- 7. A powerful storm with strong winds and heavy rain.
- 8. A large, flat area of land.
- 9. An object that orbits a planet or moon.
- 10. The study of the Earth's surface, including its features and people.
- 12. To move people away from a dangerous place.
- 13. A dry, barren area of land with little vegetation.
- 15. A sudden and damaging event, such as a hurricane or earthquake.
- 17. A large, natural elevation of the Earth's surface, often with a peak.
- 18. A raised area of land that is smaller than a mountain.
- 20. A flexible pipe for carrying water.
- 22. Someone who saves people from danger.
Down
- 1. The release of molten rock, ash, and gases from a volcano.
- 5. A person who works in a library.
- 6. A long period of dry weather with little or no rain.
- 11. A message that tells people about possible danger.
- 13. To damage something so badly that it can't be used anymore.
- 14. A sudden shaking of the ground caused by movement in the Earth's crust.
- 16. The area where the land meets the sea.
- 19. An overflowing of water onto land that is normally dry.
- 21. The study of how living things interact with each other and their environment.