ESL5 Science (1-1): Plate Tectonics

A scientist who examines rocks to find out about Earth’s history and structure

• geologist

• scientist

• humanist

• naturalist

the Earth's continents were once joined together in a single supercontinent called Pangaea, and over millions of years, they have drifted apart to their current positions on the Earth's surface

• continental drift

• Mesosaurus

• Pangaea

• plate tectonics

What's the theory?

• continental drifts

• supercontinents

• plate tectonics

• compression

What's the evidence scientist found to support continental drinft?

• mountains on the east coast of South America had the same type of rocks as the mountains on the west coast of Africa

• rocks on the east coast of South America and the west coast of Africa

  were the same age

• Mesosaurus has been found in very old rocks in South America and Africa

• Messosaurus could have swum through the salt water in Atlantic Ocean

a massive landmass formed by the merging of multiple continental blocks

• supercontinent

• plate tectonics

• asthenosphere

• rift valley

the name given the one large area of land that began to break apart about 200 millions years ago to create the present continents

• Pangaea

• continental drifts

• plate tectonics

• lithosphere

Over millions of years , South America and Africa have drifted apart, the water filled this space between them formed............

• Atlantic Ocean

• Specific Ocean

• Indian Oceans

• Arctic Ocean

How long is the ocean floor spreading between South America and Africa every year?

• 4cm

• 5cm

• 2cm

• 3cm

It is to explain how forces deep within Earth can cause ocean floors to spread and continents to move.

• plate tectonica

• mid-ocean ridge

• rift valley

• compression

a squeezing or a pushing together of the crust

• compression

• faults

• geologist

• shear