Unit 4 Lesson 1: Review Game

Earth has five layers based on physical properties. The diagram below shows these five layers. Which letter represents the mesosphere?

• B
• C
• D
• E

Imagine you could travel in a straight line through Earth from a point on one side and come out on the other side. What compositional layer would you travel through in the exact center of Earth?

• core
• crust
• lithosphere
• mesosphere

The diagram below shows Earth divided into five layers. Scientists divide Earth into these layers based on what properties?

• core properties
• physical properties
• chemical properties
• atmospheric properties

Scientists have identified five physical layers that compose Earth. Which layer is the slow-flowing lower part of the mantle?

• outer core
• lithosphere
• mesosphere
• asthenosphere

Which compositional layer of Earth is the thinnest?

• the crust
• the mantle
• the inner core
• the outer core

Madelyn drew a diagram of Earth showing one way that scientists have divided it. She included the core, the mantle, and the crust. Madelyn divided her diagram into three layers based on which of the following?

• relative density
• physical structure
• geographical location
• chemical composition

How is the outer core of Earth different from the inner core?

• The outer core is solid, and the inner core is liquid.
• The outer core is liquid, and the inner core is solid.
• The outer core is made of nickel, and the inner core is made of iron.
• The outer core is made of iron, and the inner core is made of nickel.

Evelyn is making a model of Earth to show how the physical layers correspond to the compositional layers. Which of the following should Evelyn show in her model?

• The physical layers exactly match the compositional layers.
• The crust is the only compositional layer not included in the physical layers.
• The physical layer of the asthenosphere includes the compositional layer of the crust.
• The physical layers of the inner core and outer core form a single compositional layer.

Scientists divide Earth into three main layers: the core, the mantle, and the crust. How are these three layers identified?

• by their plate tectonics
• by their structural features
• by their physical properties
• by their chemical composition

Scientists divide Earth into three main layers. Each layer has a different chemical composition. Which is the innermost layer of Earth?

• Earth's innermost layer is the core.
• Earth's innermost layer is the mantle.
• Earth's innermost layer is the lithosphere.
• Earth's innermost layer is the asthenosphere.