Exploring the Evidence of Earth's Layers

What have scientists determined about the structure of the Earth?

• It has separate and distinct layers.

• It is a single solid layer.

• It is made entirely of water.

• It is completely hollow.

What was one early belief about the Earth's composition?

• It was made of metal.

• It was filled with water.

• It was a giant gas ball.

• It was made entirely out of rock.

What is the deepest humans have descended into the Earth?

• 7.5 miles

• 2 miles

• 10 miles

• 5 miles

What are seismic waves?

• Waves of water in the ocean

• Waves of energy released during an earthquake

• Waves of sound in the air

• Waves of light from the sun

Tags

NGSS.MS-PS4-2

What are the two types of seismic waves?

• P waves and Q waves

• S waves and T waves

• P waves and S waves

• Q waves and R waves

Which type of seismic wave is faster and moves through both solids and liquids?

• P waves

• Q waves

• R waves

• S waves

Which type of seismic wave cannot move through liquid material?

• P waves

• S waves

• R waves

• Q waves

Tags

NGSS.MS-PS4-2

What instrument is used to detect seismic waves?

• Anemometer

• Seismograph

• Barometer

• Thermometer

What did scientists conclude when S waves could not travel directly through the Earth?

• The Earth is made of metal.

• The Earth is hollow.

• The Earth is entirely solid.

• There is a liquid core blocking the waves.

What is the layer just below the Earth's crust made of?

• Entirely solid

• Entirely liquid

• A semi-liquid mixture of both

• Entirely gas

Tags

NGSS.MS-ESS2-1