Across
- 2. the boundary where the land and the ocean meet
- 5. a map that shows shapes, contours and sizes of land
- 7. the month that Earth Day is celebrated
- 8. the highest point of an ocean wave
- 10. the continuous movement of water and water vapor from water sources to the air and land and back to the water source
- 12. a vent in the Earth's crust where molten rock and gas can escape from below the surface
- 14. an ocean wave caused by an earthquake or volcanic eruption
- 15. large chunk of ice that breaks away from a glacier
- 16. gas element that makes up 21% of the Earth's atmosphere
- 17. the highest mountain on Earth
Down
- 1. molten rock found below the Earth's surface
- 2. area of science that studies to protect the natural environment
- 3. the time it takes Earth to make one revolution around the sun
- 4. waste, gas, or emissions that destroys ecosystems
- 6. scientific term for all land on the planet
- 9. the time it takes Earth to make one rotation on its axis
- 11. the wearing away of land from water and wind
- 13. a small landmass completely surrounded by water