
Water on Earth
Flashcard
•
Science
•
6th - 8th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the main source of freshwater on Earth?
Back
Glaciers and polar ice caps contain the greatest amount of Earth's freshwater.
2.
FLASHCARD QUESTION
Front
What percentage of Earth's water is saltwater?
Back
97% of Earth's water is saltwater.
3.
FLASHCARD QUESTION
Front
What is the importance of conserving water?
Back
Conserving water helps to ensure that there is enough freshwater available for all living things.
4.
FLASHCARD QUESTION
Front
What is the water cycle?
Back
The water cycle is the continuous process by which water moves from the Earth's surface to the atmosphere and back.
5.
FLASHCARD QUESTION
Front
What is groundwater?
Back
Groundwater is water that is stored underground in soil and rock layers.
6.
FLASHCARD QUESTION
Front
Why is less than 0.3% of Earth's water drinkable?
Back
Most of Earth's water is saltwater or trapped in ice, making only a small fraction available for drinking.
7.
FLASHCARD QUESTION
Front
What human activities harm freshwater sources?
Back
Pollution, overuse, and habitat destruction are major human activities that harm freshwater sources.
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