Continental Drift / Plate Tectonics

Question 1

The convection currents are found in the ______________________ of the Earth.

Answer 1

asthenosphere

Question 2

The Earth’s magnetic fields are created by the ____________________ core.

Answer 2

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Question 3

Ocean crust is made of ________________ rock and

continental crust is made of ____________________ rock.

Answer 3

basalt

granite

Question 4

Scientist know about the Earth’s interior by studying ____________________ (earthquake) waves.

Answer 4

seismic

Question 5

Wegener believed that millions of years ago the Earth’s continents were joined into a land mass called _________________.

Answer 5

pangaea

Question 6

Ancient organisms preserved in rock are called ___________________.

Answer 6

fossils

Question 7

List the types of evidence that Wegener used to support his Continental Drift Theory.

a. ________________________________________
b. ______________________________________________
c. ______________________________________________
d. ______________________________________________

Answer 7

fossils
puzzles
climate change
coal fields

Question 8

The longest chain of mountains on Earth are found on the ocean floors and are called _______

Answer 8

mid-ocean ridge

Question 9

Why did most geologists rejected Wegener’s theory?

Answer 9

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Question 10

If two plates come together, a ____________________ boundary is formed.

Answer 10

covergent

Question 11

Scientists were able to “see” the mid-ocean ridge by using ____________________.

Answer 11

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Question 12

Lava flows from the mid-ocean ridge and creates ___________________________.

Answer 12

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Question 13

Scientists discovered that rocks farther away from the mid-ocean ridge were_____________ than those rocks near the ridge.

Answer 13

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Question 14

A _______________________ zone is created when ocean floor sinks into a trench and melts back into the mantle.

Answer 14

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Question 15

Explain why seafloor spreading explained continental movement.

Answer 15

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Question 16

_____________________________________ is the theory that pieces of the Earth’s crust called plates are in constant motion.

Answer 16

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Question 17

Converging boundaries on two continental plates will create __________________.

Answer 17

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Question 18

A rift-valley is created by _______________________ boundary on land.

Answer 18

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Question 19

As some plates collide and some plates separate, they will form ________, __________ and ocean basins.

Answer 19

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Question 20

The youngest rocks in the ocean would be found at _________________________.

Answer 20

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Question 21

Of the following, which would not be evidence of plate movement?
volcanoes mid-ocean ridges earthquakes mountains rivers trenches

Answer 21

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Question 22

The _________________________________ mountains are formed when the Indian plate collides with the Eurasian plate.

Answer 22

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Question 23

Continental Drift is caused by convection currents and ___________________________.

Answer 23

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Question 24

Rocks on the ocean floor are (younger, same age, older) than continental rocks.

Answer 24

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Question 25

When plates slide past one another, which of the following happens?
volcanoes earthquakes trenches mid-ocean ridges rift valleys mountains

Answer 25

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Question 26

What surface event helps scientist to study the Earth’s interior?

Answer 26

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Question 27

Ocean floor rocks are _________________ than continental rocks.

Answer 27

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Question 28

What is magnetic reversal?

Answer 28

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Question 29

Cracks that form on plates as they are stretched and pulled by plate movement are called___________. What is the very active earthquake zone in California called? _____________

Answer 29

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Question 30

Ocean currents can affect the ___________________ of nearby land.

Answer 30

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Question 31

What is upwelling?

Answer 31

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Question 32

What 2 factors create Density Currents?

Answer 32

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Question 33

Waves and currents are caused by _______________.

Answer 33

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Question 34

List 2 geological features or events that happen at each of these boundaries.
Transform boundary
Convergent boundary
Divergent boundary

Answer 34

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Question 35

Why will an ocean plate sink beneath a continental plate?

Answer 35

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Question 36

At what location on the sea floor would you find a subduction zone?

Answer 36

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