8th Grade FINAL 12/15/23

Wegener’s theory that all continents had once been joined together in a single landmass and have drifted apart since.

• Seafloor Spreading

• Continental Drift

• Subduction

• Pangaea

Tags

NGSS.MS-ESS2-3

Wegener’s theory was rejected by scientists because he could not explain what ____________ pushes or pulls continents.

• continent

• magma

• force

• drift

Wegener named this supercontinent

• Pangaea

• Panaga

• Gondwanaland

• Madagascar

Tags

NGSS.MS-ESS2-3

Name one major technology piece that helped Harry Hess' theory.

• Computers

• Lasers

• Sonar

• Submarines

The formation of new areas of oceanic crust, which occurs through the upwelling of magma at midocean ridges and its subsequent outward movement on either side is called

• Subduction

• Seafloor Spreading

• Divergent boundary

• Convergent boundary

Tags

NGSS.MS-ESS2-3

This is a model of sea floor spreading at a divergent boundary called a_________________________________

• Divergent boundary

• Transform boundary

• Mid Ocean Ridge

• Oceanic Crust

Molten material below Earth's surface is called _____________, ____________ reaches the surface of our planet through a volcano vent

• lava, magma

• fire, lava

• magma, lava

• none of the above

What causes sea floor spreading?

• Convectional Currents

• Convection Currents

• Plates moving

• Divergent boundary and subduction

What boundary is being showed here?

• Divergent

• Transform

• Subduction

• Convergent

Temperature and pressure _______ as you move towards the center of the Earth.

• decrease

• increase

• neither answer is correct.

• both increase and decrease