Quiz on Earth's Structure and Plate Tectonics

What is the hottest part of the Earth?

• Crust

• Mantle

• Inner core

• Outer core

What is the thickness range of the Earth's crust?

• 200 - 300 km

• 60 - 100 km

• 0 - 60 km

• 100 - 200 km

What is the mantle primarily made of?

• Gaseous elements

• Semi-molten rock

• Liquid nickel

• Solid iron

What are tectonic plates?

• Liquid layers of the Earth's core

• Solid layers of the Earth's crust

• Magnetic fields around the Earth

• Gaseous layers in the atmosphere

What mechanism is believed to move tectonic plates at divergent margins?

• Slab pull

• Ridge push

• Convection currents

• Earth's rotation

What happens during slab pull?

• Older plates sink into the mantle

• Magma rises to the surface

• New crust forms

• Plates move apart

What is the outer layer of the Earth called?

• Lithosphere

• Crust

• Mantle

• Core

What is the primary cause of earthquakes and volcanic eruptions?

• Magnetic field shifts

• Tectonic plate movement

• Weather changes

• Ocean currents

What is the thickness of the mantle approximately?

• 1,000 km

• 2,900 km

• 5,500 km

• 10,000 km

What type of crust is found underneath large land masses?

• Oceanic crust

• Continental crust

• Sedimentary crust

• Igneous crust