Benchmark Review

Where is the majority of Earth’s freshwater located?

• clouds

• polar ice caps

• rivers

• Pacific Ocean

Which statement best explains the reason some insects can walk across the surface of a lake?

• Its adhesiveness causes good capillary action.

• Its cohesiveness causes good capillary action.

• Its cohesiveness causes high surface tension.

• Its adhesiveness provides high surface tension.

Which is an example of water condensing?

• Dew forming on plants during a cold night.

• A puddle disappearing on a hot summer afternoon.

• Sweat on your forehead after you do a lot of exercise.

• Ice cubes melting when you put them out in the sun.

Which type of substance can float in water?

• A substance with high cohesion.

• A substance with a higher density than water.

• A substance with a lower density than water.

• A substance with low cohesion.

70% of Earth's surface is covered with water. What percentage of this water is freshwater?

• 97%

• 70%

• 60%

• 3%

Which best describes the characteristics of a river basin?

• the land drained by a river and its tributaries

• the land formed when rivers create estuaries and marshes

• the mouth of a river where water flows into the ocean

• the land formed as a result of a river flooding

Water is the only substance on Earth that

• freezes at very low temperatures.

• boils at very high temperatures.

• exists in the liquid state.

• commonly exists in all of its different states.

If you use water as a solvent, which of the following statements is true?

• The water will dissolve a nonpolar and a polar substances.

• The water will dissolve only the nonpolar substances.

• The water will dissolve only the polar substances.

• The water will not dissolve any of the substances.

Fresh water from rivers mixes with the ocean's salt water in

• wetlands

• mangrove swamps

• salt marshes

• estuaries

100 mL of water is heated and boils at 100°C. At what temperature would 90 mL of water boil?

• 10°C

• 90°C

• 100°C

• 110°C