Gas Pressure Quiz
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Questions and Answers

What is the purpose of a barometer?

  • To measure temperature
  • To measure atmospheric pressure (correct)
  • To measure humidity
  • To measure wind speed

    • How is Torricelli's barometer constructed?

  • By filling a glass tube with water and inverting it in a dish of water
  • By filling a glass tube with air and inverting it in a dish of water
  • By filling a glass tube with liquid mercury and inverting it in a dish of mercury (correct)
  • By filling a glass tube with liquid mercury and inverting it in a dish of water

    • What keeps the mercury in the tube of the barometer?

  • Magnetism
  • Friction
  • Pressure exerted by the atmospheric gases (correct)
  • Gravity

    • How does atmospheric pressure vary with altitude?

    <p>It decreases with increasing altitude</p> Signup and view all the answers

    Which of the following is a property of gases?

    <p>Gases mix completely with any other gas</p> Signup and view all the answers

    What happens to the can as it cools?

    <p>The can collapses</p> Signup and view all the answers

    What fills the can when it is sealed and cooled?

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

    What is the role of the water vapor in the can experiment?

    <p>It increases the pressure inside the can</p> Signup and view all the answers

    What causes atmospheric pressure to vary?

    <p>Changing weather conditions</p> Signup and view all the answers

    What happens to atmospheric pressure when a 'low' is approaching?

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

    What is the height of the column of mercury in Torricelli's barometer at sea level?

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

    What is the height of the column of mercury in Torricelli's barometer at an elevation of feet?

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

    What is the main cause of atmospheric pressure?

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

    What does a decrease in atmospheric pressure often indicate?

    <p>Approaching storm</p> Signup and view all the answers

    Which of the following is a property of gases?

    <p>Gases uniformly fill any container</p> Signup and view all the answers

    What causes the can to collapse as it cools?

    <p>The air pressure pushing against the can</p> Signup and view all the answers

    What happens when the water vapor in the can condenses?

    <p>The gas pressure inside the can decreases</p> Signup and view all the answers

    What happens to the air pressure inside the can when it is sealed and cooled?

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

    What is the purpose of the experiment shown in Figure 8.1?

    <p>To show the effect of atmospheric pressure</p> Signup and view all the answers

    What causes a balloon to become firm when it is blown up with air?

    <p>The pressure exerted by the air inside</p> Signup and view all the answers

    What is the most obvious property of a gas mentioned in the text?

    <p>Gases exert pressure on their surroundings</p> Signup and view all the answers

    What fills the can when it is sealed and cooled?

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

    What is the atmospheric pressure exerted by?

    <p>The gases in the atmosphere</p> Signup and view all the answers

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