Plate Tectonics

Plate Tectonics

Multiple Choice

This is the most rigid layer of the Earth.

• lithosphere

• asthenosphere

• stratosphere

• atmosphere

Multiple Choice

The name of the theory that Earth's continents used to be joined in one giant land mass that later broke apart and drifted away from each other.

• Nebular Theory

• Big Bang Theory

• Continental Drift Theory

• Land Mass Separation Theory

Multiple Select

Check all the statements that are true according to the scientific evidence about Pangaea.

• Pangaea only formed once.

• There are many ways that continents could fit together to form Pangaea.

• Pangaea formed more than once.

• Similar ancient animal fossils were found on Africa and South America.

• Earth's continents used to be part of a super-continent called Pangaea.

Multiple Select

Which of these statements are true about ocean trenches?

• Ocean trenches are deep canyons in the ocean floor.

• The dense crust is sinking into the asthenosphere.

• The lithosphere is rising up through the asthenosphere.

Multiple Choice

How much do ocean trenches and ridges move each year?

• They do not move.

• 2-3 inches per year

• 2-3 meters per year

• 2-3 miles per year

Multiple Select

Check the true statements.

• warmer materials rise

• warmer materials sink

• cooler materials rise

• cooler materials sink