Exploring the Layers of Our Planet

How many main layers make up the Earth?

• Two

• Three

• Five

• Four

What is the Earth's crust called when it is under the ocean?

• Continental crust

• Lithosphere

• Mantle

• Oceanic crust

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

• Between 500°F and 3000°F

• Between 100°F and 2000°F

• Between 0°F and 1000°F

• Between air temperature and 1600°F

What is the lithosphere primarily made of?

• Water and air

• Sand and clay

• Iron and nickel

• Granite and basalt

Which layer of the Earth is the largest?

• Mantle

• Crust

• Inner core

• Outer core

What is the mantle primarily composed of?

• Liquid water

• Solid rock

• Gas

• Magma

What creates volcanic activity on the Earth's surface?

• Asthenosphere movement

• Earthquakes

• Magma escaping to the surface

• Shifting plates

What metals make up the outer core?

• Copper and zinc

• Nickel and iron

• Aluminum and magnesium

• Gold and silver

How thick is the outer core?

• 2000 miles

• 500 miles

• 1000 miles

• 1400 miles

What causes the inner core to be solid despite its high temperature?

• Low temperature

• Lack of metals

• Presence of water

• High pressure