Water Cycle (Gizmo)

What percentage of Earth's water is found in the oceans?

• 97%
• 100%
• 70%
• 50%

How does the Sun cause water to move from the oceans to the atmosphere?

• evaporation
• precipitation
• infiltration
• transpiration

How do clouds form?

• When saturated air cools
• When unsaturated air cools
• When saturated air warms
• When unsaturated air warms

What causes it to rain?

• When the water droplets in clouds grow large enough
• When enough runoff returns to the ocean
• When underground aquifers get replenished
• When enough transpiration occurs 

What is transpiration?

• A process where plants release water vapor from their leaves
• To take or carry from one place to another with a vehicle
• A process of condensation from water vapor in the atmosphere into microscopic droplets of liquid water

What human activity uses the most water worldwide?

• agriculture
• recreation
• human bodily consumption
• decoration

What human activity uses the most water in the United States?

• agriculture
• recreation
• human bodily consumption
• industrial processes

What organisms break down chemical wastes in a treatment plant?

• bacteria
• mammals
• plants
• fungi

What is an aquifer?

• A bottled water brand
• A porous rock that stores water
• A body of water that stores water for human use
• A body of water that is composed of salt water instead of fresh water

In what ways can runoff be a problem?

• It can cause flooding and erosion
• It can raise gloabl sea level
• It can create too much cloud cover