CA8S6e3abcd

Freshwater is water that contains little or no salt. Which of the following is least likely to be a source of freshwater?

• glaciers

• lakes

• oceans

• rivers

Where is most of the Earth's freshwater located?

• in the ocean

• in icecaps and glaciers

• in rivers and streams

• in aquifers

The graph shows the distribution of water on Earth's surface. What can be concluded from the image?

• A. Most of the freshwater on Earth is found in oceans.

• B. Most of the water available on Earth is not drinkable.

• C. Most of the water available on Earth is drinkable.

Why are oceans a major part of the water cycle?

• because they are large bodies of salt water that easily evaporate salt into the air

• because they are large bodies of salt water that fresh water can be evaporated from

• because the salt water condenses easily to become a gas in the air

• because the salt water runs off onto land to fill lakes and streams

Where is most of Earth's water found?

• glaciers

• lakes

• oceans

• rivers

What is the primary cause of water evaporation from Earth's oceans and lakes?

• energy from the Sun

• heat from the surrounding land

• warm air masses from the tropics

• circulation of warm water currents

Which of the following experiments would BEST help illustrate the Sun's role in the water cycle?

• Leave a dish of water out on a picnic table on a cold day. Measure the temperature and the volume of the water throughout the day.

• Leave a dish of water out on a picnic table on a cold day. Measure the amount of time it takes the dish of water to completely freeze.

• Leave a dish of water out on a picnic table on a cool day and on a warm day. Measure the air temperature and water loss throughout each day.

• Leave a dish of water out on a picnic table on a cool day and on a warm day. Measure the air temperature and the water temperature throughout the day.

What is the purpose of this model?

• to illustrate how water travels from Earth's surface into the atmosphere and back to Earth's surface again

• to illustrate how some water is lost on Earth as some of it never returns to Earth's surface once it evaporates

What is the purpose of the diagram?

• to show how water moves through the water cycle

• to show how water is used by plants and animals

• to show how severe weather forms in the water cycle

• to show how Earth's water formed billions of years ago

Evaporation in the water cycle is most affected by

• the Sun's energy.

• Earth's rotation.

• human activities.

• Earth's landforms.