Unit 3 Test Review: Earth's Water

When the sun heats up the surface of a puddle of water, the water

• condenses

• evaporates

• infiltrates

• precipitates

Earth's water is mostly

• saline

• freshwater

• fresh ground water

• fresh surface water

Water on Earth is either freshwater or saltwater. What is the percent ratio of freshwater to percent saltwater on Earth?

• 1% freshwater : 99% saltwater

• 3% freshwater : 97% saltwater

• 30% freshwater : 70% saltwater

• 50% freshwater : 50% saltwater

The letters A-D represent large bodies of water in the United States. All of these are freshwater and are flowing, which means they are moving and do not stay still. They empty into a larger body of water, such as an ocean. What are these bodies of water called?

• glaciers

• lakes

• rivers

• seas

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?

• the pot has a small hole in it

• some of the water boiled out onto the stove

• some of the water evaporated out of the pot

• he spilled some of the water when he put it on the stove

snow

hail

sleet

rain

These are all a source of ___________ on the Earth.

• wind

• water

• climate

• natural disaster

The Gulf Stream current shown here makes the waters of the North Atlantic

• warmer

• cooler

• more dense

• less nutrient rich

The two most abundant elements in ocean water, besides hydrogen and oxygen, are

• salt & sodium

• salt & chlorine

• sodium & calcium

• sodium & Chlorine

The two most abundant elements in the oceans are sodium and chlorine. Together they make a salt, halite. Sodium is dissolved in groundwater and river water that flows into the ocean.

What is the MOST LIKELY source of chlorine?

• volcanic gases

• subduction zones

• decomposing bedrock

• decomposing sea animals

Large waves, called __________, are different from surface waves and are usually caused by underwater earthquakes, volcanic eruptions, or landslides.

• swells

• tsunami

• breakers

• capillary waves