Plate tectonics and Continental Drift

Question 1

What is an Epicenter?

Accepted Answer

the point on the surface directly above the focus

Question 2

Who first suggested the theory of continental drift?

Accepted Answer

Alfred Wegner

Question 3

What type of boundaries are associated with reversed magnetism?

Accepted Answer

divergent

Question 4

Where is old ocean floor destroyed?

Accepted Answer

trench

Question 5

After a volcano erupts the climate cools due to

Accepted Answer

increased gases, dust and ash in the atmosphere blocking insolation

Question 6

Why does the oceanic crust sink below the continental crust?

Accepted Answer

it is more dense

Question 7

The pattern of magnetic reversal is best preserved where?

Accepted Answer

igneous bedrock of the oceanic crust

Question 8

What features are found at divergent plate boundaries?

Accepted Answer

ridges

Question 9

Which earth layer contains the convection currents that move the plates?

Accepted Answer

asthenosphere

Question 10

How long ago did Pangaea begin to break apart?

Accepted Answer

200 million years ago

Question 11

The inferred latitude of NYS 359 million years ago was closest to the

Accepted Answer

equator

Question 12

P waves

Accepted Answer

travel through liquids and solids

Question 13

What are plates?

Accepted Answer

Pieces of Earth's crust that move slowly over the mantle

Question 14

Antarctica's location and climate changed because Antarctica moved

Accepted Answer

southward resulting in a colder climate

Question 15

Which of the following is TRUE of the Richter Scale:

Accepted Answer

it is based on a logarithmic scale

Question 16

What are mid ocean ridges?

Accepted Answer

system of underwater mountains

Question 17

Where is Earth's crust probably the thickest?

Accepted Answer

Rocky Mountains

Question 18

What is a focus?

Accepted Answer

point beneath Earth's surface where rock breaks and an earthquake begins

Question 19

S waves

Accepted Answer

do not travel through liquids

Question 20

Which landmass is moving with Australia?

Accepted Answer

India

Question 21

The presence of the same ____________ on different continents is evidence for continental drift

Accepted Answer

fossils

Question 22

Tsunami are usually caused by what?

Accepted Answer

earthquakes under the sea

Question 23

Fossils are found in South America. What other continent are they likely to be found?

Accepted Answer

Africa

Question 24

Compared to Africa, tectonic motion is shifting South America towards the

Accepted Answer

west

Question 25

What is an area where magma breaks through the crust that is not on a plate boundary?

Accepted Answer

hot spot

Question 26

What movement is happening along the San Andreas fault?

Accepted Answer

transform movement

Question 27

What kind of boundary do you find at the Mariana trench?

Accepted Answer

convergent

Question 28

As evidence accumulates, the support for the theory that the continents were once joined

Accepted Answer

increases

Question 29

What percentage of Earth's surface are covered by oceans?

Accepted Answer

70%

Question 30

What does the hot spot in Iceland indicate?

Accepted Answer

there are many volcanic eruptions in Iceland

Question 31

What causes plate movement?

Accepted Answer

convection

Question 32

The East Pacific Rise is the boundary between what 2 plates?

Accepted Answer

Pacific & Antarctic

Question 33

Active volcanoes occur

Accepted Answer

along plate boundaries like the ring of fire

Question 34

The Pacific plate is subducting under the

Accepted Answer

North American plate

Question 35

The Hawaiian Islands were formed as a result of

Accepted Answer

an oceanic plate moving over a mantle hot spot

Question 36

Which is NOT evidence of continental drift?

Accepted Answer

seismic wave behavior

Question 37

Most inferences about the characteristics of Earth's mantle and core are based on

Accepted Answer

seismic wave behavior

Question 38

Which process creates a mid ocean ridge and new ocean floor?

Accepted Answer

sea floor spreading

Question 39

What is the best evidence that sea floor spreading is occurring at the mid Atlantic ridge?

Accepted Answer

bedrock is younger near the ridge

Question 40

The motion of convection currents is making the Atlantic Ocean floor

Accepted Answer

wider

Plate tectonics and Continental Drift

Questions 40

Plate tectonics and Continental Drift

Questions 40