1. Around how far does a typical tectonic plate move in a year?

2. What do we call the portion of the Earth that moves in tectonic plates?

3. Oceanic plates are made up of a material called 'sima' that is mostly silicon and what other element?

4. Continental plates are made up of a material called 'sial' that is mostly silicon and what other element?

5. What type of tectonic plate boundary occurs where two plates are getting pushed apart?

6. What type of tectonic plate boundary occurs where two plates slide past each other creating a fault?

7. What type of tectonic plate boundary occurs where two plates are getting pushed together?

8. At what type of plate boundary is new land formed when magma pushes up from the mantle and cools?

9. At what type of plate boundary do mountains and volcanoes often form?

10. How many tectonic plates do scientists categorize as 'major' plates?