4.2 Restless Continents

Question 1

the hypothesis that states that the continents ounced formed a single landmass broke up and drifted to their present locations

Answer 1

continental drift

Question 2

the process by which new oceanic lithosphere forms as magma rises towards the surface and solidflies

Answer 2

sea-floor spreading

Question 3

one huge landmass 245 million years ago

Answer 3

pangaea

Question 4

places where sea-floor spreading takes place

Answer 4

mid ocean ridge

Question 5

when Earth’s magnetic poles switch places

Answer 5

magnetic reversal