Civic Quiz on Earth Layers and Events

What is the Earth's outermost layer called?

What is the layer below the crust called?

What are the two layers inside the Earth's core?

• Outer core and inner core
• Lithosphere and asthenosphere
• Upper core and lower core
• Mantle and crust

What is the approximate thickness of the Earth's crust?

• 0-70 km thick

• About 20 kilometers (12.4 miles) under continents and 2-5 kilometers (1.2-3.1 miles) under oceans.
• Approximately 50 kilometers (31 miles) under continents and 15 kilometers (9.3 miles) under oceans.

Which layer of the Earth is made of molten rock?

How deep is the outer core?

• The outer core is about 1,000 kilometers deep.
• 2391-5150 km

• The outer core is around 5,000 kilometers deep.
• The outer core is approximately 3,500 kilometers deep.

Which layer of Earth is solid and extremely hot?

What layer of the Earth do humans live on?

What are tectonic plates?

• Tectonic plates are large sections of the Earth's lithosphere that move and interact with one another.
• Tectonic plates are clouds that form in the atmosphere.
• Tectonic plates are layers of water in the ocean.
• Tectonic plates are small rocks found on the Earth's surface.

Are all tectonic plates the same size?

• Yes, all tectonic plates are the same size.
• Some tectonic plates are larger than others, but they are all equal in size.
• Tectonic plates vary in shape but not in size.
• No, tectonic plates are not all the same size.