Exploring Earth's Hidden Secrets Beneath the Surface

Jaclyn Howard takes viewers on a virtual tour of Earth's interior, exploring the crust, mantle, and core. The video explains the composition and characteristics of each layer, including a newly discovered underground ocean. It also discusses how seismic waves help scientists understand Earth's internal structure.

What is the thickness of the continental crust?

• Around 4 miles

• Up to around 50 miles

• Around 1,800 miles

• Around 3,000 miles

What element is not a major component of the Earth's crust?

• Iron

• Gold

• Sulphur

• Magnesium

At what depth was the hidden ocean discovered beneath North America?

• 400 miles

• 1,800 miles

• 50 miles

• 3,000 miles

What is the state of the Earth's outer core?

• Half solid, half liquid

• Molten iron

• Gaseous

• Solid

How hot can the Earth's outer core get?

• About 11,000 degrees Fahrenheit

• Between 7200 and 9,000 degrees Fahrenheit

• Same as the surface of the Sun

• Below 0 degrees Fahrenheit

What is the primary composition of the Earth's inner core?

• Molten iron

• Solid gold

• Solid iron

• Liquid oxygen

How does the temperature of the Earth's inner core compare to the surface of the Sun?

• It's about the same

• It's hotter

• It's cooler

• There's no comparison

What method do scientists use to study the Earth's interior?

• Deep sea diving

• Satellite imaging

• Seismic waves

• Drilling

What does the speed of seismic waves reveal about Earth's interior?

• The age of the material

• The temperature of the material

• The color of the material

• The state of the material (solid, liquid, or something else)

What is not a layer of the Earth mentioned in the video?

• The atmosphere

• The outer core

• The mantle

• The crust