TBSHS Year 8 - The Restless Earth Quiz 5

Continental and oceanic crust - Choose the correct statements

• Continental crust is older than oceanic crust

• Continental crust is lighter than oceanic crust

• Oceanic crust is thicker than continental crust

• Oceanic crust can sink so can be renewed or destroyed

Which type of crust can sink and can therefore be renewed or destroyed?

• Continental

• Oceanic

What happens to the oceanic crust at a destructive plate boundary?

• It collides (crashes) into the continental plate, forming fold mountains

• It rises above the continental plate

• It sinks below the continental plate and melts to form magma

Which force causes tectonic plates to become stuck?

• Heat

• Friction

• Gravity

Which of the following best describes the FOCUS of an earthquake?

• The point on the Earth's surface where the earthquake is felt most strongly

• The point under the ground where the earthquake occurs

• The join between the two tectonic plates

Which of the following best describes the EPICENTRE of an earthquake?

• The point on the Earth's surface where the earthquake is felt most strongly

• The point under the ground where the earthquake occurs

• The join between the two tectonic plates

Why do the tectonic plates suddenly become unstuck and release all their stored energy?

• Water from rainfall soaks into the rock and makes it slippery

• The pressure pushing the plates past each other overcomes the friction holding them together

• The friction holding the plates together weakens

Which of the following best describes an earthquake?

• Slow, gentle tremors in the Earth's mantle

• Sudden, violent shaking in the Earth's core

• Sudden violent shaking in the Earth's crust

What happens to the stored energy when the two plates at a boundary finally move?

• It is slowly released

• It is suddenly released

• It turns into heat energy

Which scale is the most accurate for measuring large earthquakes with a magnitude of over 5?

• Mercalli scale

• Richter scale

• Moment Magnitude scale