Continental Drift and Sea-floor Spreading

Who proposed the theory of continental drift?

• Harry Hess

• Alfred Wegener

• Chasity Clary

• Principal O'Neal

The theory of continental drift states...

• the continents will eventually drift off the side of Earth

• the continents drifted onto Earth from other planets

• new crust is formed at the mid-ocean ridge

• the continents were once one big landmass and slowly moved to where they are today

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

What is the name of the big landmass that existed before the continents separated?

• Gondwana

• Laurasia

• Pangea

• America

Tags

NGSS.MS-ESS1-4

Which of the following is evidence of continental drift? Check all that apply.

• continents seem to fit together like a puzzle

• common fossils across the continents

• the sonar map of the seafloor

• similar rock types and mountain ranges across the continents

Tags

NGSS.MS-ESS2-3

What is the longest mountain range in the world?

• Mid-Atlantic Ridge

• Himalayas

• Rocky Mountains

• Appalachian Mountains

Where is the longest mountain range in the world located?

• in Africa

• in Europe

• on the ocean floor

• on the moon

Tags

NGSS.MS-ESS2-2

The mid-ocean ridge is at what type of boundary?

• convergent

• divergent

• transform

• transverse

Tags

NGSS.MS-ESS2-3

What is created at the mid-ocean ridge?

• a new continent is being created there

• a new ocean is being formed there

• new islands are being created there

• new sea floor is created when the plates pull apart and magma bubbles up from the mantle and cools.

Tags

NGSS.MS-ESS2-3

What happens to the old sea floor?

• it is recycled back into the mantle at subduction zones.

• Nothing happens to the old crust. The Earth is actually getting larger and larger due to the contstant formation of new crust.

• it dissolves into the ocean

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

True or False: Newer crust can be found closer to the Mid-Atlantic Ridge and older crust can be found further from the Mid-Atlantic Ridge.

• TRUE

• FALSE

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3