Layers of the Earth Review

Guess what? Our planet Earth isn't as young as you might think! Can you figure out its age?

• 4.6 Billion years old

• 2.5 Billion years old

• 6.8 Billion years old

• 3.2 Billion years old

Answer explanation

The age of the earth is approximately 4.6 billion years old. This is the correct choice.

Tags

NGSS.MS-ESS1-4

Guess what? The Earth's outer core is not what you might think it is! What is it actually made of?

• Nickel and Iron

• Liquid rock

• Solid ball of NiFe

• Molten lava

Answer explanation

The outer core is made of Nickel and Iron, which are the correct choices.

Tags

NGSS.MS-PS1-1

Guess what? The Earth has layers, just like an onion! Can you tell me how thick the mantle layer is?

• 2400 km

• 2300 km

• 2900 km

• 1801 m

Answer explanation

The thickness of the mantle is 2900 km, which is the correct choice.

Ready to dive deep into Earth's layers? Guess the temperature range of the mantle!

• 7000-8000 degrees

• 870-4400 degrees

• 4400-6100 degrees

• 2400 km

Answer explanation

The temperature range of the mantle is 870-4400 degrees. This range is significant for understanding the heat distribution within the Earth's interior.

Guess what? The top layer of the Earth's crust isn't what you might expect! What's it made of?

• Liquid metal

• Molten lava

• Cool rock

• Solid ball of NiFe

Answer explanation

The top layer of the crust is made of cool rock, which forms the Earth's surface.

Tags

NGSS.MS-ESS2-1

Guess what? The continental crust is actually a slab of what?

• Liquid metal

• Molten lava

• Cool rock

• Solid ball of NiFe

Answer explanation

The continental crust is a slab of cool rock.

Guess what the inner core is actually made of? It's not what you might think!

• Molten lava

• Solid ball of NiFe

• Cool rock

• Liquid metal

Answer explanation

The inner core is a solid ball of NiFe, not molten lava, cool rock, or liquid metal.

Guess what? The Earth has a secret inner core! Can you tell how wide it is?

• 2900 km

• 1491 mi

• 1801 m

• 2400 km

Answer explanation

The diameter of the inner core is 1491 mi, which is the correct choice.

Guess what? The outer core of our planet isn't what you might expect! What's it really made of?

• Solid ball of NiFe

• Cool rock

• Molten lava

• Liquid metal

Answer explanation

The outer core is made of liquid metal, specifically a mixture of nickel and iron (NiFe).

Ready to dive deep into Earth's layers? Guess the temperature range of the outer core!

• 870-4400 degrees Celsius

• 4400-6100 degrees Celsius

• 7000-8000 degrees Celsius

• 2400 km

Answer explanation

The temperature range of the outer core is 4400-6100 degrees. This range is where the correct answer lies.