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What is the chemical formula for water? A) H2O B) O2 C) CO2 D) NaCl
A) H2O
What is the percentage of Earth’s surface covered by water? A) 30% B) 50% C) 71% D) 90%
C) 71%
What percentage of Earth’s water is freshwater? A) 3% B) 10% C) 50%
A) 3%
What is the process of liquid water turning into vapor called? A) Condensation B) Evaporation C) Precipitation D) Infiltration
B) Evaporation
What is the largest source of freshwater on Earth?
Lakes
Glaciers
Groundwater
Rivers
Which of the following is an example of surface water?
Soil moisture
Water vapor
Lake
Which water source is often treated for drinking water in urban areas?
Glaciers
Ocean water
River water
What type of water is stored in glaciers?
Mineral water
Brackish water
Freshwater
Salty water
What is runoff?
Water that seeps into the ground
Water that evaporates into the air
Water flowing on the surface toward rivers or lakes
Which of the following is an example of a renewable water source? A) Aquifers B) Rivers C) Desalinated water D) Oil
B) Rivers
Why is water conservation important?
Water sources can become polluted or overused.
Water conservation is unnecessary in rainy regions.
Freshwater is easily replenished.
Water is an unlimited resource.
What is one way to conserve water at home?
Letting the faucet run while brushing teeth
Washing cars with a hose
Fixing leaky faucets
Taking long showers
Which of the following activities wastes the most water?
Leaving the tap running while washing dishes
Installing low-flow showerheads
Collecting rainwater for gardening
Using a bucket to wash a car
How does planting trees help conserve water?
Trees block rainwater.
Trees reduce river flow.
Trees absorb too much water.
Trees reduce soil erosion and increase groundwater recharge.
Which activity conserves water outdoors?
Using sprinklers during the day
Washing cars frequently
Removing mulch from gardens
Watering plants in the early morning or evening
Which of the following is the largest reservoir of freshwater on Earth?
Lakes
Rivers
Groundwater
Glaciers and ice sheets
