Earth and Its Composition

What is the age of Earth compared to the age of the universe?

• 1/3

• 1/2

• 1/4

• 1/5

How was Earth formed?

• From the remnants of dead stars

• From a giant gas cloud

• From a collision with Mars

• From volcanic eruptions

What is the composition of Earth's surface?

• Heavy metal core and light surface crust

• Heavy metal core and heavy surface crust

• Light metal core and light surface crust

• Light metal core and heavy surface crust

What is the largest satellite in relation to its planet in the solar system?

• The Moon

• Mars

• Jupiter

• Saturn

What percentage of Earth's surface is covered by water?

• 71%

• 50%

• 30%

• 10%

What percentage of Earth's water is fresh water?

• 2.5%

• 5%

• 10%

• 20%

What is the name of the process that causes the movement of Earth's crust?

• Plate Tectonics

• Volcanic Eruptions

• Earthquakes

• Erosion

What is the thickness of Earth's crust on average?

• 50 kilometers

• 100 kilometers

• 200 kilometers

• 500 kilometers

What is the name of the layer in Earth's atmosphere where the ozone layer is located?

• Stratosphere

• Troposphere

• Mesosphere

• Thermosphere

What is the outermost layer of Earth's atmosphere called?

• Exosphere

• Ionosphere

• Troposphere

• Stratosphere