Inside Earth

What is the term for the vibrations that travel through Earth during an earthquake?

• Fault

• Seismic wave

• Crust

• Mantle

Fill in the blank: The outer layer of Earth is called the ______.

• Mantle

• Crust

• Inner core

• Outer core

How do scientists learn about Earth's interior without being able to see it?

• By digging deep holes

• By using seismic waves

• By guessing

• By reading books

What is the approximate distance from Earth's surface to its center?

• 2,000 kilometers

• 4,000 kilometers

• 6,400 kilometers

• 8,000 kilometers

A seismograph is an instrument that measures the energy of ________.

• volcanoes

• earthquakes

• hurricanes

• tornadoes

Imagine the world as an apple. What part of the apple represents the Earth's crust?

• A) The core

• B) The seeds

• C) The skin

• D) The flesh

In the Quick Lab activity, what object is dropped into the water to observe wave patterns? Fill in the blank: A _______ is dropped into the water.

• Stone

• Marble

• Coin

• Leaf