Earth Features and Changes

Which layer of Earth is the thinnest?

• Inner core

• Crust

• Outer core

• Mantle

Earth is composed of four layers. Many scientists believe that as Earth cooled, the denser materials sank to the center and the less dense materials rose to the top. The least dense layer is the —

• crust

• mantle

• outer core

• inner core

Which of these best represents the Earth’s structure?

• Diagram A

• Diagram B

• Diagram C

• Diagram D

Which of these best describes the relationship between Earth’s layers?

• The hottest layers are closest to the core.

• The more liquid layers are closest to the crust.

• The lightest layers are closest to the core.

• The more metallic layers are closest to the crust.

Tags

NGSS.MS-ESS2-1

What layer of Earth is located just below the crust?

• Inner core

• Mantle

• Continental shelf

• Outer core

Which of these Earth layers is the thinnest?

• The inner core

• The outer core

• The mantle

• The crust

Pumice is formed when lava from a volcano cools. Which rock type is pumice?

• Gaseous rock

• Igneous rock

• Sedimentary rock

• Metamorphic rock

Granite is a hard material and forms from cooling magma. Granite is a type of —

• lava stone

• igneous rock

• volcanic dust

• sedimentary rock

A student made observations of four rock samples. Which of these observations most likely describes a sedimentary rock?

• Sample 1 has bands of light and dark crystals.

• Sample 2 has pink, gray, and white crystals grown together.

• Sample 3 is made up of one huge, pale pink crystal.

• Sample 4 is made up of layers of sand grains cemented together.

Lava cools to form —

• igneous rock

• sedimentary rock

• metamorphic rock

• sandstone