Unit 3 Earth study guide per 6

1. Movement caused within a fluid by the tendency of the hotter fluid rising is called:

2. The __________________is the soft part of the mantle that moves very slowly, the tectonic plates float on top of this layer.

3.The theory of __________________ states that the Earth’s lithosphere is divided into large slabs we call tectonic plates. There are about 12 large plates and several smaller ones.

4. What is a magnetic reversal?

8. What causes the Earth’s magnetic field?

9. Which of the following terms best describes the rocky outer zone of the Earth where rocks behave in a rigid manner?

a. asthenosphere

b. biosphere

c. atmosphere

d. lithosphere

10. What are the two types of tectonic plates (found under the ocean and the continents)? (notes, plate tectonic activity)

11. The San Andres fault is caused by two plates moving horizontally in opposite directions this the description of a classical (notes)

15. The Mid-Atlantic ridge is caused by a _______________________ boundary

16. Why is Earth’s magnetic field important?

Pyroclastic flow

5. What type of boundary results in new seafloor being produced? _____________________

6. When rock layers bend due to the pressure due to the pressure caused by plate tectonics it is called

7. What is an example of convergent continental boundaries colliding with each other?

14. Which part(s) of the Earth’s interior is liquid? (HW/notes/textbook)

17. Using the figure above, how many magnetic reversals are between 0 and 1.5 m.y.o.

18. What type of zone is being formed by the two crusts?_________________________

19. What is being formed at point B?_________________________

20. What type of boundary is occurring at A?___________________

21. What is being formed at point A?_________________________

22. Label the figure of the Earth layers:

12. Where is the youngest seafloor? How old is it?

13. How old is the seafloor off the coast of Florida?

23. These are very dangerous formations caused by the melting of ice or snow. These quickly pick up rock and other debris forming a high energy river that destroys anything in its path. (vocab word)

________________________

24. A hot, high-velocity mixture of ash, gas and fragmented rock that flows almost like a liquid down the sides of a volcano. (vocab word)_________________

25. What is the name of the supercontinent that existed during the Mesozoic? ___________________

26. Alfred Wegener came up with a revolutionary new idea, what was it? (The name of his theory)

27. Name at least 3 lines of evidence Wegener used to support his theory.