Podcast
Questions and Answers
What percentage of the Earth's water is represented by fresh water in rivers and lakes?
What percentage of the Earth's water is represented by fresh water in rivers and lakes?
- 2%
- 1% (correct)
- 5%
- 10%
Which process in the water cycle involves water vapor cooling and forming clouds?
Which process in the water cycle involves water vapor cooling and forming clouds?
- Precipitation
- Evaporation
- Infiltration
- Condensation (correct)
Which of the following statements about the oceans is true?
Which of the following statements about the oceans is true?
- They are only found in the Pacific and Atlantic regions.
- They cover about 71% of the Earth's surface. (correct)
- They contain less than 90% of the Earth's fresh water.
- They are the smallest water reservoirs on Earth.
How does precipitation that does not infiltrate the ground behave?
How does precipitation that does not infiltrate the ground behave?
What is the primary source of energy for the evaporation process in the water cycle?
What is the primary source of energy for the evaporation process in the water cycle?
Flashcards
Saltwater vs. Freshwater
Saltwater vs. Freshwater
Over 97% of Earth's water is saltwater. Less than 1% is freshwater.
Percentage of Earth's surface covered by water
Percentage of Earth's surface covered by water
About 71% of Earth's surface is covered by water.
Evaporation
Evaporation
Water turning into water vapor due to heat.
Condensation
Condensation
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Water Cycle
Water Cycle
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Study Notes
Water on Earth
- Earth is called the "Water planet" or "Blue planet" due to its water abundance.
- 71% of Earth's surface is covered by water.
- 97% of Earth's water is saltwater found in oceans.
- 2% of Earth's water is glacial ice.
- Less than 1% of Earth's water is freshwater in rivers and lakes.
- Pacific, Atlantic, Indian, and Arctic are major water reservoirs (oceans).
Water Cycle
- The water cycle is a continuous process involving water's movement.
- This cycle has no beginning or end.
- Rainfall is a major source of fresh water for Earth.
- Numerous springs and rivers also contribute fresh water.
- The sun's heat causes evaporation, converting water into water vapor.
- This water vapor undergoes condensation, creating clouds.
- Clouds release precipitation (rain or snow).
- Precipitation flows into rivers, lakes, and oceans.
- Some water infiltrates into the ground and becomes groundwater.
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