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 ____.

• Crust

• Mantle

• Outer core

• Inner core

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

What is the Earth's crust compared to in the text?

• An orange's peel

• An apple's skin

• A banana's peel

• A watermelon rind

Scientists use information from _______ to learn about Earth's layers.

• volcanoes

• earthquakes

• oceans

• mountains