What percentage of the Earth's surface is covered by water?
Question 2
Which of the following is the largest source of fresh water on Earth?
Question 3
What is the term for the process by which water from the surface of the Earth is heated by the sun and then rises into the atmosphere?
Question 4
Which of the following is the main source of water vapor in the atmosphere?
Question 5
What is the term for the process by which water vapor in the atmosphere turns into liquid water droplets?
Question 6
Which of the following is a form of precipitation?
Question 7
What is the term for the downward movement of water from the atmosphere to the Earth’s surface?
Question 8
Which of the following is an example of a natural source of water pollution?
Question 9
What is the term for the process by which plants release water vapor into the atmosphere?
Question 10
Which of the following is a human-made source of water pollution?
Question 11
What is the term for the underground layer of water-bearing permeable rock from which groundwater can be extracted?
Question 12
Which of the following is an example of a non-renewable source of water?
Question 13
What is the term for the level below which the ground is saturated with water?
Question 14
Which of the following is a method of water conservation at the individual level?
Question 15
What is the term for the area drained by a single river system or a watershed?
Question 16
Which of the following is a method of water conservation at the community level?
Question 17
What is the term for the process of restoring the natural vegetation cover in an area?
Question 18
Which of the following is a method of water conservation at the national level?
Question 19
What is the term for the removal of salts and other impurities from seawater to make it suitable for drinking?
Question 20
Which of the following is an example of a method to control water pollution?
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