Understanding Plate Tectonics

What is the outermost layer of the Earth where we live called?

• Asthenosphere

• Crust

• Core

• Mantle

Which type of Earth's crust is denser and mainly composed of basalt?

• Asthenosphere

• Oceanic crust

• Lithosphere

• Continental crust

What geological feature is formed when two oceanic plates converge?

• Mountain ranges

• Volcanoes

• Deep sea trenches

• Rift valleys

Which type of plate boundary is responsible for the creation of the Himalayas?

• Subduction zone

• Transform boundary

• Divergent boundary

• Convergent boundary

What is the primary cause of tectonic plate movement?

• Solar radiation

• Convection currents in the mantle

• Wind currents

• Magnetic fields

Which scientist proposed the idea of continental drift?

• Isaac Newton

• Alfred Wegener

• Charles Darwin

• Galileo Galilei

What evidence supports the theory of continental drift?

• Identical languages

• Similar weather patterns

• Same animal species worldwide

• Identical fossils on different continents

What happens to the Earth's crust at divergent boundaries?

• It becomes denser

• It is destroyed

• It remains unchanged

• New crust is formed

How does gravity contribute to the movement of tectonic plates?

• By pushing plates upwards

• By pulling plates towards the equator

• By causing plates to float

• By helping denser crust to sink

Why doesn't the Earth shrink or expand despite constant plate movement?

• Because of the balance between crust creation and destruction

• Because the Earth is too large

• Because of the Earth's magnetic field

• Because of the atmosphere