WVGSA Grade 5 Science Practice Questions - West Virginia General Summative Assessment Grade 5 Science Exam

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Data on Earth's water volumes: - Total Water: 1,386,000,000 km³ - Fresh Water (3%): 41,580,000 km³ - Accessible Surface Fresh Water in Lakes & Rivers (0.3% of Fresh Water): ~125,000 km³ Given these global water reserves, why is freshwater conservation critical even though water covers 70% of Earth's surface?

All water on Earth will evaporate into outer space within 50 years. Less than 1% of all water on Earth is liquid fresh water that is readily accessible for human consumption, agriculture, and ecosystems. Saline ocean water cannot evaporate to produce rain. Glaciers generate all atmospheric oxygen gas.

Correct Answer:

Less than 1% of all water on Earth is liquid fresh water that is readily accessible for human consumption, agriculture, and ecosystems.

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