Environmental Science - Water Resources

Approximately how much of the water on our planet is fresh (not salt)?

• 2.5%

• 50%

• 75%

• 100%

The majority of Earth's fresh water exists ________.

• in the form of ice

• in the oceans

• in freshwater lakes, streams, and rivers

• in the atmosphere

Humans use more fresh water for

• making fuel

• agriculture

• electrical production

• washing

The movement of water through our biosphere is known as the

• nitrogen cycle

• water cycle

• hydrogen cycle

• evaporation

The majority of Earth's salt water exists

• in the atmosphere

• in freshwater lakes, streams, and rivers

• in the form of ice

• in the oceans

The precipitation that flows over land and enters waterways is

• moisture

• runoff

• transpiration

• evaporation

The process of liquid water returning to the atmosphere as a gas is

• seepage

• moisture

• flux

• evaporation

Oceans cover approximately what percent of Earth's surface?

• 10%

• 55%

• 71%

• 99%

The gently sloping area that underlies the shallow water bordering continents is the

• pycnocline

• surface zone

• bathymetric zone

• continental shelf

Currently, the greatest ecological crisis facing marine organisms and food webs is

• abandoned fishing nets

• radiation

• unsustainable fishing

• oil spills