Exploring the Moon
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Questions and Answers

Which gas is used in fire extinguishers to put out fires?

  • Nitrogen
  • Oxygen
  • Water vapour
  • Carbon dioxide (correct)

    • Which gas is used in cutting metals in the industry?

  • Oxygen (correct)
  • Carbon dioxide
  • Water vapour
  • Nitrogen

    • What gas is used to produce a fog effect on stages?

  • Oxygen
  • Nitrogen
  • Carbon dioxide
  • Water vapour (correct)

    • What gas is used in advertising lights?

    <p>Neon</p> Signup and view all the answers

    What gas is used to fill balloons and airships?

    <p>Helium</p> Signup and view all the answers

    What gas is used to fill light bulbs?

    <p>Argon</p> Signup and view all the answers

    What gas is used for storing living cells and tissues?

    <p>Liquid nitrogen</p> Signup and view all the answers

    What gas is used to fill some food packages to prevent food from going bad?

    <p>Nitrogen</p> Signup and view all the answers

    What gas does not support burning and is denser than air?

    <p>Carbon dioxide</p> Signup and view all the answers

    What gas is used to help with breathing difficulties?

    <p>Oxygen</p> Signup and view all the answers

    Which gas relights a glowing splint?

    <p>Oxygen</p> Signup and view all the answers

    What happens to a burning splint when it is placed into a test tube of oxygen?

    <p>It goes out</p> Signup and view all the answers

    What happens to a glowing splint when it is placed into a test tube of oxygen?

    <p>It relights</p> Signup and view all the answers

    What happens to hydrogencarbonate indicator when it is added to a test tube of oxygen?

    <p>It does not change</p> Signup and view all the answers

    What happens to limewater when it is added to a test tube of oxygen?

    <p>It does not change</p> Signup and view all the answers

    What happens to a burning splint when it is placed into a test tube of carbon dioxide?

    <p>It goes out</p> Signup and view all the answers

    What happens to a glowing splint when it is placed into a test tube of carbon dioxide?

    <p>It goes out</p> Signup and view all the answers

    What happens to hydrogencarbonate indicator when it is added to a test tube of carbon dioxide?

    <p>It turns yellow</p> Signup and view all the answers

    What happens to limewater when it is added to a test tube of carbon dioxide?

    <p>It turns blue</p> Signup and view all the answers

    Which gas does not have a simple test to identify it?

    <p>Noble gases</p> Signup and view all the answers

    According to the text, why are living things found on Earth but not on the Moon?

    <p>The Moon has a different atmosphere than the Earth</p> Signup and view all the answers

    What is air made up of according to the text?

    <p>Nitrogen, oxygen, carbon dioxide, noble gases, water vapor, and small amounts of other gases</p> Signup and view all the answers

    According to the text, what percentage of air is nitrogen?

    <p>21%</p> Signup and view all the answers

    According to the text, what percentage of air is carbon dioxide?

    <p>0.03%</p> Signup and view all the answers

    According to the text, what percentage of air is water vapor?

    <p>0.07%</p> Signup and view all the answers

    According to the text, how can we test for gases in air?

    <p>By studying their color, smell, and ability to burn or react with other chemicals</p> Signup and view all the answers

    According to the text, what are the major components of air?

    <p>Nitrogen, oxygen, carbon dioxide, noble gases</p> Signup and view all the answers

    According to the text, why is air essential to living things?

    <p>It provides oxygen for living things to breathe</p> Signup and view all the answers

    According to the text, why are there no living things found on the Moon?

    <p>The Moon does not have an atmosphere</p> Signup and view all the answers

    According to the text, who discovered oxygen?

    <p>Joseph Priestley</p> Signup and view all the answers

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