Theory of Plate Tectonics

Alfred Wegener claimed that all continents were once joined in one large continent and he called it:  

• Pangea

• Fred

• Eurasia

• Gondwanaland

Tags

NGSS.MS-ESS2-3

Wegener had good evidence to support his Theory of Continental Drift.  Which of these are pieces of evidence he had:

• The continents seem to fit together like puzzle pieces (matching coastlines)

• The rocks and rock layers on the coasts of continents match up

• all of these

• Glacier evidence matches up on different continents (past climates are similar)

Tags

NGSS.MS-ESS2-3

Sea-floor spreading is ...

• when continents collide.

• what happens at the mid-oceanic ridge where a divergent boundary is causing two plates to move away from one another resulting in spreading of the sea floor.

• when continents subduct.

• none of these.

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

The picture summarizes that ...

• The present continents will gradually move to form a single landmass called Pangaea.

• The continents were once a large landmass, but the ocean levels rose, and these ocean's separate today's continents.

• The continents were once a large landmass, but the north and south magnetic poles pulled the continents apart toward the poles.

• The continents were once a large landmass named Pangaea, which broke apart and gradually drifted to the present-day locations of the continents.

Tags

NGSS.MS-ESS2-3

In the image below, the circular paths shown by the red arrows represent _______ currents in the Earth's mantle.

• electric

• convection

• conduction

• radiation

Tags

NGSS.MS-ESS2-1

During convection currents as matter moves towards the lower mantle, the density

• decreases

• increases

• stays the same

• does not change

Tags

NGSS.MS-ESS2-1

NGSS.MS-PS1-4

During convection currents as matter moves towards the lower mantle, the temperature

• increases

• decreases

• stays the same

• does not change

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

During the 1950's, patterns like the ones shown in the diagram below were found within the crust on the ocean floor.  What did this discovery provide evidence for?

• two plates converging

• two plates sliding past each other

• how many times Earth's magnetic pole has flipped

• how hot spot volcanoes form

Tags

NGSS.MS-ESS2-3

During convection currents as matter moves towards the upper mantle, the temperature

• increases

• decreases

• stays the same

• doesn't matter

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

During convection currents as matter moves towards the upper mantle, the density

• increases

• decreases

• stays the same

• doesn't matter

Tags

NGSS.MS-ESS2-1