Earth's Crust and Tectonic Activity

The video explains the formation and breakup of the supercontinent Pangea, the types of Earth's crust, and the role of tectonic plates in causing earthquakes and volcanic activity. It highlights the San Andreas Fault and the Ring of Fire as key examples of tectonic activity. Understanding these processes helps mitigate natural disaster impacts.

What was the name of the supercontinent that existed around 300 million years ago?

• Atlantis

• Pangea

• Laurasia

• Gondwana

Which type of Earth's crust is thicker?

• None of the above

• Both are the same

• Continental crust

• Oceanic crust

What is the primary reason we find few ancient meteor impacts on Earth?

• They are too small to detect

• They are hidden under the oceans

• Continual changes in Earth's crust

• Earth's atmosphere burns them up

What causes tectonic plates to move?

• Interactions along their boundaries

• Magnetic fields

• Ocean tides

• Wind currents

What natural event is caused by the sudden movement of tectonic plates?

• Hurricane

• Tsunami

• Earthquake

• Volcanic eruption

Which fault line is known for the 1906 earthquake near San Francisco?

• New Madrid Fault

• San Andreas Fault

• Hayward Fault

• Cascadia Subduction Zone

What process involves oceanic crust sliding beneath continental crust?

• Sedimentation

• Convection

• Subduction

• Erosion

What is the primary cause of volcanism at plate boundaries?

• Earth's magnetic field

• Subduction of oceanic crust

• Erosion of mountains

• Tectonic plate collision

What is the Ring of Fire known for?

• Frequent hurricanes

• Frequent earthquakes and volcanoes

• Being the hottest place on Earth

• Having the most diverse wildlife

Why is understanding Earth's crust important?

• To limit damage from natural disasters

• To predict weather patterns

• To find new mineral resources

• To understand ocean currents