Layers of the Earth

What is the Earth often mistakenly thought to be?

• A liquid sphere

• A steady, solid ball of rock

• A gas giant

• A hollow planet

Which of the following is NOT mentioned as a feature of Earth's surface?

• Huge mountains

• Deep canyons

• Vast oceans

• Tropical rainforests

Tags

NGSS.MS-ESS2-2

What natural phenomena are mentioned as occurring on every continent?

• Tsunamis and hurricanes

• Earthquakes and volcanoes

• Tornadoes and floods

• Avalanches and landslides

What theory helps explain the changes happening on Earth?

• Plate tectonics

• Evolution

• Gravity

• Relativity

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

How many layers is the Earth made of?

• Two

• Three

• Four

• Five

What is at the center of the Earth?

• Outer core

• Inner core

• Mantle

• Crust

What is the thickness of the inner core?

• About 400 miles

• About 600 miles

• About 800 miles

• About 1,000 miles

What is the composition of the outer core?

• Solid metal

• Liquid metal

• Partly melted rock

• Hard, rocky material

How thick is the outer core?

• About 800 miles

• About 1,200 miles

• About 1,400 miles

• About 1,800 miles

What is the temperature of the inner and outer core?

• About 5,000 °F

• About 7,000 °F

• About 10,000 °F

• More than 10,000 °F

Tags

NGSS.HS-ESS2-3