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Questions and Answers
What percentage of the Earth's surface is covered by water?
What percentage of the Earth's surface is covered by water?
- 90%
- 30%
- 50%
- 71% (correct)
What is a unique property of water when it freezes?
What is a unique property of water when it freezes?
- It remains the same volume
- It expands (correct)
- It becomes denser
- It contracts
What is the primary role of water in living organisms?
What is the primary role of water in living organisms?
- A waste product
- A building material for cells
- Essential for life and hydration (correct)
- A source of energy
Water is a colored liquid essential for the survival of living organisms.
Water is a colored liquid essential for the survival of living organisms.
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Pollution refers to the removal of contaminants from the environment.
Pollution refers to the removal of contaminants from the environment.
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Water pollution only occurs in oceans and lakes.
Water pollution only occurs in oceans and lakes.
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Biological pollutants in water include bacteria, viruses, and parasites.
Biological pollutants in water include bacteria, viruses, and parasites.
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Physical pollutants in water can include sediment.
Physical pollutants in water can include sediment.
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