Across
- 4. Sediments, matter, rainwater
- 6. formed at spreading centres on oceanic ridges
- 8. About 3.8 billion years ago
- 12. 71% of Earth’s surface
- 13. rocks which are enriched in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium
- 14. Evolution of species
Down
- 1. the layer of granitic, sedimentary, and metamorphic rocks
- 2. openings where magma shoots out of earth
- 3. 97% saltwater, 2% glaciers and ice sheets, 1% freshwater
- 5. when two plates slip past each other
- 7. rock which is rich in magnesium and iron.
- 9. Able to evaporate
- 10. Asteroids, volcanoes, etc.
- 11. Salt in ocean over time