Q12: Layers of the Earth REVIEW
1. What is the name of the Super Continent?
a. Pangaea
2. What is the name of the Super Ocean?
a. Panthalassa
3. What is the name of the Northern part of Pangaea after it split?
a. Laurasia
4. What is the name of the Southern part of Pangaea after it split?
a. Gondwana Land
5. About how many million years ago did Pangaea start to separate?
a. 240 million years ago
6. About how many millions years old is the Atlantic Ocean?
a. 180 million years old
7. In this type of plate boundary Oceanic Crust sinks below Continental Crust
a. Subduction
8. In this type of plate boundary Continental crust collides with Continental Crust
a. Convergent
9. Oceanic crust’s interaction with other oceanic crust is this type of plate boundary
a. Divergent
10. In this type of plate boundary the world’s tallest mountains are created, such as the
Himalaya’s
a. Convergent
11. In this type of plate boundary faults (cracks in the Earth) are made
a. Sliding
12. In this type of plate boundary ocean trenches are made
a. Subduction
13. In this type of plate boundary the Mid Atlantic Ridge was made
a. Divergent
14. Why does Oceanic Crust sink below Continental Crust?
a. Oceanic Crust is more dense
15. About how many degrees (at its hottest) is the Crust?
a. 350 degrees F
16. About how many degrees (at its hottest) is the Mantle?
a. 3,300 degrees F
17. About how many degrees (at its hottest) is the Core?
a. 9,000 degrees F
18. What two metals are the Inner and Outer Core made of?
a. Nickel and Iron
19. About how thick, in miles, is the Mantle?
a. 1,800 miles
20. About how thick, in miles, is the Oceanic Crust?
a. 3-5 miles
21. About how thick, in miles, is Continental Crust?
a. 12-25 miles
22. What is the name given to the upper part of the Mantle
a. Asthenosphere
23. What is the name given to the land (crust)?
a. Lithosphere
24. The Core (Inner and Outer) account for what fraction/percentage of the Earth’s mass?
a. 1/3 or 33%
25. The Mantle accounts for what percentage of the Earth’s volume?
a. 80%