Why There's a Straight Line Through Scotland

When were the landmasses that would eventually form Great Britain initially separated?

• 520 million years ago

• 430 million years ago

• 10,000 years ago

• 66 million years ago

What is the name of the geological event that caused the two landmasses to collide and form Great Britain?

• The Great Glen Fault

• The Ice Age

• The Caledonian Orogeny

• A volcanic eruption

How do the pieces of Earth's crust move in a strike-slip fault, like the Great Glen Fault?

• They move vertically, one piece sliding up or down.

• They move horizontally, sliding past each other.

• They move towards each other, causing the crust to buckle.

• They move away from each other, creating a gap.

What natural process helped make the Great Glen Fault line more visible by carving a deep valley that goes below sea level?

• Volcanic eruptions

• River erosion

• Glacial recession

• Earthquakes