Review Layers of the Earth and Earth Systems

1. Which is the layer of Earth on which we live?

• Inner Core
• Outer Core
• Mantle
• Crust

2. How does Earth’s inner core differ from the outer core?

• The inner core is solid, the outer core is liquid.
• The inner core is liquid, the outer core is solid.
• The inner core is divided into plates, the outer core is not
• The outer core is divided into plates, the inner core is not.

3. Which of Earth’s layers is the thinnest?

• Crust
• Mantle
• Outer Core
• Inner Core

4. What is the temperature of Earth’s core?

• Less than 500 degrees Celsius
• More than 5,500 degrees Celsius
• About 100 degrees Celsius
• About 30 degrees Celsius

5. Volcanoes bring up material from a depth of 150 kilometers. Most of this material comes from which layer of Earth?

• Inner Core
• Outer Core
• Mantle
• Crust

6. The core can be divided into two parts—a liquid outer core and a solid inner core. What material is the core made of?

• Gold and silver
• Aluminum and copper
• Zinc and lead
• Iron and nickel

7. A student wanted to build a model of Earth’s layers using the following materials: a small ball, some playdough, aluminum foil, and flavored gelatin. Which of these materials would be the best to model Earth’s crust?

• Small ball
• Playdough
• Aluminum foil
• Flavored gelatin

8. The graph below shows how massive Earth’s layers are in relation to one another. What is one conclusion you can make based on the information in the graph?

• The crust is more massive than the core.
• The core is the least massive layer of Earth.
• The mantle is twice as massive as the core.
• The core is made up of both solid and liquid materials.

9. Which of Earth’s layer consists of rocks that flow like melted taffy?

• Inner Core
• Outer Core
• Mantle
• Crust

10. All of the living things on Earth are part of the ________.

• Hydrosphere
• Geosphere
• Biosphere
• Atmosphere