Plate Tectonics

Who first proposed the theory of continental drift

• Darwin

• Wegener

• Pangaea

• Newton

Tags

NGSS.HS-ESS1-5

Continental drift is explained by which of the following?

• Earth's surface has seven landmasses

• The continents do not move

• Earth is slowly cooling and shrinking

• The continents were a single landmass

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

Most scientists rejected Wegener's idea of continental drift because:

• multiple types of evidence were used as support

• the climate of Pangaea was described

• the force that pushes or pulls continents could not be explained

• the ring of fire was evidence

Predict what would happen if the seafloor were not spreading. BE PREPARED TO EXPLAIN YOUR ANSWER!

• Wegener would have evidence for continental drift

• There would be more earthquakes

• No new crust would be formed

• Sea levels would be higher

Tags

NGSS.HS-ESS1-5

NGSS.HS-ESS2-1

What four types of evidence were used to prove that a continent was once part of the larger continent?

• Continents look like puzzle peices that may have fit together

• Fossils on each peice of the continent puzzle match to the other

• Glacial deposits and some mountains matched between current continents.

• Sea floor spreading showed evidence of newer rock material from plates pulling apart deep in the ocean

• The same animals are on every continent

Tags

NGSS.HS-ESS1-5

NGSS.HS-ESS1-6

Mid-ocean ridges (choose 2 answers)

• are on continental crust

• are on oceanic crust

• are like the Grand Canyon

• are like mountain ranges

What is the role of denser rock in sea floor spreading?

• It floats to the surface of the ocean

• It is subducted under the less dense molten material

• It is so light it just sits there

• It has nothing to do with sea floor spreading

Tags

NGSS.MS-ESS2-3

Subduction means

• that a plate slides along another plate

• That a plate melts

• That a plate is pushed underneath another plate

• That a plate does not move

Tags

NGSS.MS-ESS2-3

Molten material is

• melted rock and earth materials

• solid rock

• melted ice

• materials that are at the top of all mountains

Tags

NGSS.MS-ESS2-1