Plate Tectonics and Continental Drift

How do we know that the continents were once connected in one big Pangea? Pick two reasons

• Fossil records match where the continents line up

• There are traces in the ocean floor of the continents splitting

• Rock records match where the continents line up

• science!

____ tectonics is the idea that the earths crust is made of 8 major plates

• Cup

• Bowl

• Fork

• Plate

Who proposed the theory of continental drift?

• Albert Wegener

• Albert Einsten

• Alberto Pena

How much do the earths plates move every year?

• Thousands of feet

• Only a few centimeters

• Miles

• Inches

Convergent is when the plate boundary ____ with another and makes mountains, volcanoes and trenches?

• collides

• scrape against

• divides or breaks apart

• floats next to each other

_____ plate boundary is when the plates divide apart and making rift valley, mid- ocean ridges and volcanoes.

• Convergent

• Divergent

• Transform

• Dinner

Transform boundaries and when the plates ____ against each other making fault lines and rift valleys

• collide

• go under

• scrape

• absorb

Plate movements cause earthquakes and volcanoes when they occur and make landforms over millions of years

• true

• false

What process in the mantle is what makes the plates move around?

• Convection

• Subduction

• Interruption

• Cooking

The continental crust is made of mostly granite, what type of rock is the oceanic crust made of?

• Obsidian

• Granite as well

• Basalt

• Rock