The observation that the continents fit together like puzzle pieces, and may once have been connected, led Alfred Wegener to propose a theory called

• continental plowing.

• continental drift.

• wandering continents.

• shape matching of continents.

Tags

NGSS.MS-ESS2-3

Youngest part of the ocean floor is found near the ____________.

• along deep ocean trenches

• where ocean sediments are thickest

• near ocean ridges

• where Earth's magnetic field changes polarity

Which of the following supported Wegener's theory?

• Matching fossil plant remains found on two different continents.

• Matching reptile remains found on two different continents.

• Nearly identical sedimentary rock types of the same age in widely separated locations.

• All of the above.

Tags

NGSS.MS-ESS2-3

NGSS.MS-LS4-1

Scientists found that the continents were moving apart from each other due to magma rising out of mid-ocean ridges, and they called this

• seafloor spreading.

• seafloor rising.

• changing seafloor.

• underwater volcanoes.

Tags

NGSS.MS-ESS2-3

Plate margins are places where a lot of tectonic activity occur. Earthquakes occur, for example, along convergent margins, where plates are

• moving apart.

• sliding past each other.

• colliding.

Tags

NGSS.MS-ESS2-3

NGSS.MS-ESS3-2

The boundary at which crust is continually added is a

• subduction zone.

• transform boundary.

• divergent boundary.

• convergent boundary.

Tags

NGSS.MS-ESS2-3

Subduction is when

• earthquakes occur along a transform boundary.

• new crust is formed.

• one plate slides under another.

• new islands are formed.

Tags

NGSS.MS-ESS2-3

The mid-ocean ridge occurs along a

• convergent boundary where new crust is formed.

• transform boundary where crust is subducted.

• divergent boundary where seafloor spreading takes place.

• divergent boundary where subduction takes place.

Tags

NGSS.MS-ESS2-3

When two continental plates pull apart a _________________ forms.

• subduction zone

• mountain range

• earthquake

• rift valley

Tags

NGSS.MS-ESS2-3

Oceanic crust is _____________ than continental crust.

• less dense

• more dense

• less hot

• more hot