Science Revision

Front 1

When and who discovered the continental drift theory?

Back 1

1912, German Meteorologist, Alfred Wegener.

Front 2

What did he observe about the continents?

Back 2

He observed that the present day continents looked as though they would fit together like a jigsaw puzzle.

Front 3

Describe Pangaea and Panthalassa.

Back 3

Pangaea:

-All the continents joined together

Panthalassa:

-The vast sea that surrounded Pangaea

Front 4

What is some evidence of a supercontinent?

Back 4

-Jigsaw fit- The continents fit together like a

puzzle

-Rock types and structures that match when joined back together across the continents

-Fossils match between continents

Front 5

Describe the crust.

Back 5

Also known as lithosphere, this layer is rigid and has high strength and made mostly solid rock that varies from 5km under the sea and 70km under mountain ranges.

Front 6

Describe the mantle.

Back 6

This layer is partially molten rock and about 2900km thick. The top part is the source of

magma that erupts onto the crust. The

temperatures vary from 500 to 2000 degrees

celsius.

Front 7

Describe the outer core.

Back 7

This layer is made of molten iron and nickel and is about 2300km thick. Temperature varies from 4000 degrees celsius to 6000 degrees celsius.

Front 8

Describe the inner core.

Back 8

This layer is made mostly of iron and is solid due to the huge pressure. It is about 1200km thick and the temperatures go up to 7000 degrees

celsius.

Front 9

Describe faulting.

Back 9

A fault is a break in the rocks of the Earth's crust along which rocks on either side have moved past each other.

Front 10

Describe folding.

Back 10

This is when layers of rock are bent and deformed without actually breaking or snapping.