Earth's Interior 1.6

To study Earth’s interior, geologists often rely on indirect methods, such as evidence from fossils. 

• True
• False

Pressure increases from Earth’s surface toward the center of Earth.

• True
• False

The outermost layer of Earth is called the mantle.

• True
• False

The part of the mantle called the _____ is made of soft rock that bends like plastic.

• asthenosphere
• lithosphere

Earthquakes produce ______ that travel through Earth

• colorful waves
• seismic waves
• tertiary waves
• predictable waves

______ is a rock with a fine, dark texture that makes up the oceanic crust.

• Granite
• Gypsum
• Basalt
• Limestone

Scientists think that the __________, made of liquid iron and nickel, moves to produce Earth’s magnetic field.

• crust
• mantle
• outer core
• inner core

Geologist learn about Earth’s interior by studying ______, which move through Earth.

• core samples
• fossils
• seismic waves
• rock layers

Holes drilled several kilometers into Earth’s crust provide direct evidence about Earth’s interior in the form of ____.

• seismic waves
• rock samples
• liquid iron
• volcanic eruptions

Geologists obtain indirect evidence about Earth’s interior by ____.

• measuring pressure differences at Earth’s surface.
• estimating temperature inside earth.
• directly looking under the many layers.
• recording and studying seismic waves.