Unit 6 Lessons 3&4

Where is most of the Earth's salt water found?

• The ocean
• Lakes and Rivers
• Glaciers
• The Gulf of Mexico

What is the difference between salt water and fresh water?

• Salt water is clean and freshwater is dirty.
• Salt water is dirty and freshwater is clean and salt water is dirty.
• Salt water contains salt and freshwater does not.
• Freshwater contains salt and salt water does not.

How many layers make up the atmosphere?

• 1
• 2
• 3
• 4

Which layer of the atmosphere does weather occur in?

• troposphere
• stratosphere
• mesosphere
• thermosphere

What state is Earth's water found?

• solid
• solid and gas
• gas
• solid, liquid, and gas

Identify the layers of the Earth in order starting at the surface.

• Mantle, inner core, outer core, crust
• Inner core, outer core, mantle, crust
• Crust, outer core, mantle, inner core
• Crust, mantle, outer core, inner core

Which layer of Earth is liquid in state?

• Crust
• Mantle
• Outer Core
• Inner Core

Weathering is the breaking down of what material?

• Water
• Rock
• Air
• Paper

Which is an example of physical weathering?

• Acid Rain
• Pollution
• Plant roots
• Groundwater

Walls built to hold water back are called

• Glaciers
• Sediments
• Meanders
• Levees