2nd Quarter

4. Which scientist is credited with the continental drift hypothesis? Alferd_______________.
7. Earthquakes occur when rocks __________.
8. Plates move apart at________boundaries.
9. The property that peels off in flat sheets.
11. Oceanic plates are pushed down into the upper mantle in ______zone.
15. What type of forces create mountains?
17. Plates move together at ______ boundaries.
20. _________can be located based on different speeds of seismic waves.
21. The place where an earthquake originates is called the __________.
22. Earth's inner core is________.
23. Which term refers to the ridged layer of Earth that is about 100 km thick and generally less dense than the material below it?
25. Each mineral has a set of properties and specific__________ makeup.
26. Changes in the ______of seismic waves were used to determine the location of Earth's layers.

1. What is the name of the giant supercontinent.
2. an underwater earthquake can cause a wave called a ______.
3. What famous strike-slip fault is located in California.
5. the largest layer of Earth is the _____?
6. The study of Earth and Earth process is called?
10. The cycle of heating, rising, cooling, and sinking is called________current.
12. The process occurring in the mantle that is thought to be the force behind plate tectonics is an example of a(n)___________current.
13. The layer over which the tectonic plates move is the _____________.
14. how many parts are in Earth's core?
16. _____________boundary has plates sliding past each other.
18. The youngest rock in the ocean floor is located at the mid-ocean______.
19. continental drift occurs because of _______spreading.
24. The fastest traveling seismic waves are____-_______?