The Water Cycle

All our sources of fresh water, like rivers, wells, and aquifers, are dependent on _______________ to replenish and maintain themselves.

• the water cycle
• sanitation plants
• desalination
• oxygenation

What happens to water during evaporation?

• It turns to gas as it cools.
• It turns to liquid as it cools.
• It turns to solid as temperature decreases.
• It turns to gas as the temperature increases.

Which best describes the composition, or make-up, of clouds?

• They are made of heated air.
• They are made of air pollution.
• They are made of tiny droplets of water.
• They are made of carbon dioxide and oxygen.

Zachary decided to make pasta for dinner. He placed a large pot filled halfway with water on the stove and turned up the heat. When it began boiling, he was in another room watching TV. He remembered to check the water 30 minutes later. When he looked in the pot, he noticed the water level was much lower than when he turned on the stove. What best explains what happened to the water?

• Some of the water boiled out onto the stove.
• Some of the water evaporated out of the pot.
• The pot has a small hole in it.
• He spilled some of the water when he put it on the stove.

Which object(s) found in the sky is/are composed of tiny water droplets?

• Clouds
• Stars
• Sun
• Moon

 Rivers, springs, and aquifers are all fresh water components of the hydrologic cycle/water cycle. As this water progresses through the cycle, it will eventually ___________ into the atmosphere before ____________ and falling back to the earth as precipitation.

• condense; evaporating
• evaporate; condensing
• dissolve; cloud-forming
• condense; precipitating

When you cool liquid water to 0^o C, what will happen?

• The water will freeze, making ice.
• The water will evaporate, creating steam.
• The water will evaporate, creating ice.
• The water will melt, and remain liquid water.

The image is a model showing the processes of the water cycle. Water uptake to the atmosphere occurs through the processes of evaporation and transpiration from plants where it condenses to form clouds. Clouds release the water through precipitation. During a summer of extreme drought, what can we expect to happen to the surface ground water stored in ponds and lakes?

• water levels will increase because there is more precipitation
• animals won't drink as much to save water, so water levels remain the same
• water levels will increase because there is more evaporation and transpiration
• water levels will decrease because there is more evaporation and transpiration

Water in the oceans, rivers, and lakes turns to water vapor. This process is called ___________ and requires heat energy from the Sun.

• Evaporation
• Condensation
• Precipitation
• Transpiration

A model of the water cycle was made using an aquarium with a glass cover, a container of ice cubes, water, and a lamp.
Which part of the water cycle causes the water droplets to form on the glass cover?

• condensation
• evaporation
• precipitation
• runoff