Introduction to Plate Tectonics

Which of the following is evidence of seafloor spreading?

• matching fossils on either side of the mid-ocean ridge

• evidence of tropical plant fossils on the seafloor

• same rock types in both North America and Africa

• the magnetic striping on the seafloor on either side of the mid-ocean ridges

Why was the evidence of seafloor spreading so important to the idea of Continental Drift?

• it answer the question for HOW continents could be moving

• it disproved Alfred Wegener's hypothesis of Continental Drift

• It shows how land bridges let prehistoric animals cross the oceans

• all of these are true

Tags

NGSS.MS-ESS2-3

What technological advances led to the acceptance of Wegener's Contienental Drift hypothesis?

• sonar and magnetometers mapped the ocean floor

• satellite communication allowed scientists to share ideas

• computers were used to model tectonic patterns

• fossils of the same organism were found on separate continents

Tags

NGSS.HS-ESS1-5

Which of the following occurs because of convection currents?

• Tectonic plates on the crust move.

• The mantle increases in size.

• Pressure in the crust increases.

• Pressure in the crust decreases.

Tags

NGSS.MS-ESS2-3

What year did Alfred Wegener create his theory?

• 1912

• 1960

• 1945

• 1512

Which ocean is expanding due to a mid-ocean ridge?

• Indian

• Dead Sea

• Atlantic

• Artic

During sea floor spreading, molten material rises up from the mantle...

• along the continents

• at the mid ocean ridges

• deep ocean trenches

• at north and south poles

Tags

NGSS.MS-ESS2-1

Earth's plates are...

• constantly moving and changing the face of the earth

• Never moves

• Moves seldom and very fast

• Moves when it feels like it

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

Which features form the longest mountain ranges on Earth?

• The mid-ocean ridges

• The deep-ocean trenches

• The Rockies

• The Andes

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

Which process adds more crust to the ocean floor?

• Suction

• Sea-floor spreading

• Subduction

• Magnetic stripe

Tags

NGSS.MS-ESS2-1