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Questions and Answers
What percentage of the Earth's surface is covered by oceans?
What percentage of the Earth's surface is covered by oceans?
- 75%
- 65%
- 80%
- 71% (correct)
Which of the following is a characteristic of fresh water?
Which of the following is a characteristic of fresh water?
- Low salinity (correct)
- Abundant marine life
- Deep ocean trenches
- High salinity
What is the primary source of fresh water on Earth?
What is the primary source of fresh water on Earth?
- Glaciers and ice caps (correct)
- Lakes and rivers
- Underground aquifers
- Atmospheric water vapor
Which of the following is a major component of the water cycle?
Which of the following is a major component of the water cycle?
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What is the average salinity of ocean water in parts per thousand (ppt)?
What is the average salinity of ocean water in parts per thousand (ppt)?
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Which of the following is a significant threat to freshwater ecosystems?
Which of the following is a significant threat to freshwater ecosystems?
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