Across
- 4. A narrow strip of sand built up by waves, often found near beaches or river mouths
- 6. A layer in the ground where many fossils or bones are found together
- 8. A long crack or valley where the Earth's crust is pulling apart
- 9. A black rock used as fuel that forms from ancient plant material
- 13. Energy made by moving water, such as from rivers or dams
- 14. marsh, A coastal area that floods with salt water and is home to grasses and wildlife
- 16. Shaped like an oval; the shape of planets’ orbits
- 17. A thick layer of mud made of tiny bits of dead plants and animals on the ocean floor
- 19. When wind, water, or ice drop off sediment in a new place
- 20. crust, The thin layer of rock that forms the ocean floor
- 22. A thick, dark liquid fossil fuel found underground
- 24. The idea that the Sun is at the center of the solar system
- 25. How much salt is in a certain amount of water
- 26. An underwater mountain formed by volcanic activity
- 28. All the water on Earth — in oceans, lakes, rivers, and the atmosphere
Down
- 1. The underground point where an earthquake starts
- 2. Able to support life, especially with the right temperature and water
- 3. A place where a river meets the ocean and fresh water mixes with salt water
- 5. When deep, cold, nutrient-rich water rises to the ocean’s surface
- 6. Fuel made from plants or animal waste that can be used for energy
- 7. A layer of rock or soil that holds groundwater
- 10. The study of space, stars, planets, and galaxies
- 11. The point on Earth’s surface directly above where an earthquake begins
- 12. The process where one tectonic plate slides under another
- 15. The old belief that the Earth is at the center of the universe
- 18. fuel, Energy that comes from the remains of ancient plants and animals, like coal and oil
- 21. Gases or substances released into the air, often from burning fuel
- 23. The edge of land that meets the ocean or sea
- 27. The study of the ocean, including its life, floor, and movement