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Across 4. Who created the hypothesis of continental drift (last Name). 6. Density= Mass/ _____ 7. __________ works on the principle of density and volume 8. What type of boundary is formed when 2 plates move against each other 10. Rocks that formed when magma dries up in the Earth. 13. Silicon and ______________ make up the mantle 14. What is O3 17. The type of rock formed when lava dries on the surface of Earth. 18. The element that has its short form of Fe 19. ________________ is a science with no explanation 20. As you increase the temperature, you decrease the __________ 21. The thickness of the Lithosphere is ___________ km

Down 1. Granite is made out of _________, mica, and quartz 2. The core is made of Iron and ____________. 3. __________________ is the smallest particle of matter. 5. A mixture of different types of atoms is known as _____________ 8. The total kinetic energy in a particular matter is known as_____________ 9. ____________ flask is used to store liquids 11. What is the name of the dude who figured out density? 12. A boundary where 2 plates move towards each other. 15. Basalt and __________ make up the crust. 16. What is the 1st step in the scientific method