Earth Science Flashcard

Front

What name is given to the type of crust that is primarily made up of basalt and is found at the bottom of the oceans?

Back

Oceanic Crust

Front

What are the two parts of the Earth's core discovered during the journey to the center of the Earth?

Back

Outer core (liquid) and inner core (solid)

Front

What is created at the mid-ocean ridge during seafloor spreading?

Back

New oceanic crust

Front

What happens when a continental plate and an oceanic plate collide at a convergent plate boundary?

Back

The more-dense oceanic plate subducts under the less dense continental plate, forming volcanoes.

Front

What can happen when two continents collide?

Back

Mountains form.

Front

Pieces of the same mountain chain are now separated on two different continents by an ocean today. What conclusion can you make that would be true about this?

Back

The mountains were once one during Pangaea.

Front

Why did most scientists reject Alfred Wegener's idea of continental drift?

Back

Wegener could not identify a force strong enough to move the continents

Front

What conclusion can be drawn from the Theory of Plate Tectonics, Pangaea, and seafloor spreading?

Back

Earth's geography changes

Front

Which of the following is NOT evidence that Alfred Wegener used to support his theory?

• similar landforms on different continents separated by oceans
• shapes of continents fit together like a puzzle
• identical fossils found on continents separated by oceans
• continents continues to move each year

Back

continents continues to move each year

Front

What is the difference between magma and lava?

Back

Magma is found below the Earth's surface and lava is found above the Earth's surface.