Plate tectonics

Question 1

very long hill formed by divergent oceanic boundary where slowly escaping magma turns into igneous rock called basalt

Answer 1

ridge

Question 2

location where magma is exceptionally hot and burns through the lithosphere like Hawaii or Yellowstone

Answer 2

hot spot

Question 3

valley created by diverging continental plates

Answer 3

rift

Question 4

line of volcanoes formed near where two oceanic plates are converging, causing some of the lithosphere to crumble and magma escapes

Answer 4

island arc

Question 5

be slowly moved along by water, wind, or in plate tectonics, by a convection current of magma

Answer 5

drift

Question 6

place in the ocean where a long deep spot formed by converging oceanic plates

Answer 6

trench

Question 7

denser; will sink

Answer 7

cooler air

Question 8

less dense; will rise

Answer 8

warmer air

Question 9

crust being created

Answer 9

oceanic divergent; continental divergent

Question 10

crust being destroyed

Answer 10

oceanic converging with continental; oceanic convergent

Question 11

what layers does the mantle include?

Answer 11

lithosphere; mesosphere; asthenosphere

Question 12

Is the convection current hotter on top or bottom?

Answer 12

bottom

Question 13

Who explained sea floor spreading

Answer 13

Harry Hess

Question 14

oldest oceanic crust

Answer 14

270 million years old; Ionian Sea

Question 15

oldest continental crust

Answer 15

over 4 billion years ago