Plate Dynamics Quiz

Question 1

Earth’s Layers aspects

Answer 1

Composition; Density, Pressure, Temperature vs depth

Question 2

Continental Crust

Answer 2

Thicker, lower density, granitic (felsic)

Question 3

Oceanic Crust

Answer 3

Thinner, higher density, basaltic (mafic)

Question 4

Convection in the asthenosphere causes

Answer 4

the plates to move

Question 5

Convection is the

Answer 5

circulation of a fluid due to differences in density.

Question 6

Ocean ridges

Answer 6

hot magma rising

Question 7

Ocean trenches

Answer 7

cool magma sinking

Question 8

Earthquakes and volcanoes are more likely to occur

Answer 8

on or near plate boundaries (where 2 plates meet)

Question 9

Convergent

Answer 9

Plates come together

Question 10

which plate gets sub-ducted

Answer 10

oceanic plate

Question 11

Ocean Trench forms from

Answer 11

convergent boundary

Question 12

Divergent

Answer 12

Plates move apart as hot magma rises due to convection

Question 13

Ocean Ridge & age of the seafloor:

Answer 13

Young crust at the ridge. Old as you move away
New, basaltic ocean crust forms here

Question 14

Magnetic Polarity aspects

Answer 14

Pattern matches up on both sides of the ocean ridge
Evidence of seafloor spreading/divergent boundary/continental drift
Evidence that the magnetic field of the earth has reversed in the past

Question 15

Transform

Answer 15

Plates slide past one another (e.g. San Andreas Fault)

Question 16

Continental Drift

Answer 16

The movement of the tectonic plates

Question 17

evidence for continental drift includes

Answer 17

Shape of continents
Matching of fossils on different continents.
Matching composition and age of rocks
Coal deposits and warm climate organisms (e.g. coral) in Antarctica, etc.