Water on Earth: Exploring Its Importance
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Questions and Answers

What percentage of the Earth's surface is covered in water?

  • 60%
  • 80%
  • 71% (correct)
  • 50%
  • What is the chemical formula of water?

  • H2S
  • H2O (correct)
  • N2O
  • CO2
  • What percentage of the Earth's water is freshwater?

  • 2.5% (correct)
  • 5%
  • 15%
  • 10%
  • What is water often called due to its ability to dissolve substances?

    <p>Universal solvent (A)</p> Signup and view all the answers

    What type of water contains roughly 3.5% salt?

    <p>Saltwater (D)</p> Signup and view all the answers

    What is the process that begins the water cycle?

    <p>Evaporation (D)</p> Signup and view all the answers

    What is the process in which plants release water vapor into the atmosphere through their leaves?

    <p>Transpiration (C)</p> Signup and view all the answers

    What is the outcome when the water droplets in the clouds become too heavy to remain suspended in the air?

    <p>Precipitation (C)</p> Signup and view all the answers

    What is the primary function of water in the human body?

    <p>Forming saliva for digestion (B)</p> Signup and view all the answers

    Why is water important for food production?

    <p>It helps in processing and ensuring food safety (A)</p> Signup and view all the answers

    What is the first step in the water cycle?

    <p>Evaporation (D)</p> Signup and view all the answers

    What is a way to conserve water, according to the text?

    <p>Fixing leaks promptly (A)</p> Signup and view all the answers

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