y7 The structure of the Earth

What is the innermost layer of the Earth?

• Crust

• Mantle

• Outer Core

• Inner Core

Which layer of the Earth is liquid?

• Inner Core

• Outer Core

• Mantle

• Crust

What is the thickest layer of the Earth?

• Crust

• Outer Core

• Mantle

• Inner Core

What is the Earth's crust made of?

• Metals and non-metals

• Semi-molten rock

• Magma

• Iron and Nickel

Who proposed the theory of continental drift?

• Galileo Galilei

• Charles Darwin

• Isaac Newton

• Alfred Wegener

What was the name of the supercontinent proposed by Wegener?

• Atlantis

• Laurasia

• Pangea

• Gondwana

What evidence did Wegener use related to the shape of continents?

• Fossils

• Matching rock types

• Ocean currents

• Continents fit together like jigsaw pieces

How do tectonic plates move?

• They are pulled by gravity

• They float on molten rock in the mantle

• They are pushed by wind

• They float on solid rock

What is the average speed at which tectonic plates move?

• 4 cm per year

• 1 cm per year

• 10 cm per year

• 20 cm per year

What type of plates carry land?

• Oceanic plates

• Continental plates