Welcome to Plant Earth

Question 1

mantle

Answer 1

the layer of the earth between the crust and the core

Question 2

asthenosphere

Answer 2

the part of the mantle that lies just below the lithosphere

Question 3

crust

Answer 3

the solid surface of the earth

Question 4

Pangaea

Answer 4

a supercontinent theorized to exist during the Paleozoic and Mesozoic Eras when the continents were joined together

Question 5

tectonic plates

Answer 5

large pieces of the lithosphere that move slowly over the mantle of the Earth

Question 6

plate boundaries

Answer 6

the edge of the tectonic plates

Question 7

convergent boundary

Answer 7

a plate boundary where two plates are moving towards each other

Question 8

divergent boundary

Answer 8

a plate boundary at which plates are moving away from each other; causes an upwelling of magma from the mantle to cool and form new crust

Question 9

transform fault boundary

Answer 9

a plate boundary at which two plates slide against each other in opposite directions

Question 10

subduction

Answer 10

the result of a converging ocean-ocean or ocean-continent boundary, in which a heavy ocean plate is pushed below the other plate and melts as it encounters the hot metal

Question 11

active volcanoe

Answer 11

volcanoes that are currently erupting or have erupted within recorded history (that is, within the last 10,000 years)

Question 12

dormant volcanoes

Answer 12

volcanoes that have not been known to erupt during the last 10,000 years

Question 13

extinct volcanoe

Answer 13

volcanoes that are not though to ever erupt again

Question 14

subduction zones

Answer 14

the site of a convergent boundary between oceanic and continental plates, or sometimes between two ocean plates, at which the subducting plate is recycled into new magma, which rises through the overlying plate to create volcanoes inland

Question 15

Rift valleys

Answer 15

the areas of new crust formation at divergent boundaries, usually between two oceanic plates