Gr 9 NATURAL SCIENCES: CH 4.4 The troposphere
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Questions and Answers

What is the average thickness of the troposphere?

  • 20 km
  • 6 km
  • 12 km (correct)
  • 18 km

    • What is the main reason for the air movement in the troposphere?

  • Warming of the Earth's surface (correct)
  • Gravity
  • Earth's rotation
  • Cooling of the Earth's surface

    • At what altitude does the temperature in the troposphere reach approximately -60°C?

  • 5-6 km
  • 15-17 km
  • 20-22 km
  • 10-12 km (correct)

    • What percentage of the atmosphere is composed of oxygen?

    <p>20.95%</p> Signup and view all the answers

    What marks the boundary between the troposphere and the stratosphere?

    <p>A stabilization of temperature</p> Signup and view all the answers

    What is the main characteristic of the air density in the troposphere?

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

    What is a key characteristic of the troposphere that influences global weather patterns and climate?

    <p>Decreasing temperature gradient</p> Signup and view all the answers

    What is the result of the Earth's rotation on the troposphere?

    <p>A varying thickness around the globe</p> Signup and view all the answers

    What occurs in the troposphere due to its decreasing temperature gradient?

    <p>Convection currents are formed</p> Signup and view all the answers

    What is the primary role of the troposphere?

    <p>To support all life on Earth and host all weather phenomena</p> Signup and view all the answers

    What is the primary component of the air in the troposphere?

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

    Why does the air in the troposphere move?

    <p>Due to the warming of the Earth's surface</p> Signup and view all the answers

    What is the result of the convection currents in the troposphere?

    <p>Cloud formation and weather patterns</p> Signup and view all the answers

    What is the characteristic of the troposphere that allows humans to breathe?

    <p>High air density</p> Signup and view all the answers

    What is the typical pattern of temperature change in the troposphere?

    <p>The temperature decreases with altitude</p> Signup and view all the answers

    What is the primary function of the transition zone between the troposphere and the stratosphere?

    <p>To trap the warm and moist air in the troposphere</p> Signup and view all the answers

    What is the significance of the troposphere's decreasing temperature gradient?

    <p>It results in the creation of convection currents</p> Signup and view all the answers

    How does the Earth's rotation affect the troposphere?

    <p>It results in the troposphere being thicker near the equator</p> Signup and view all the answers

    What is the troposphere's primary role in supporting life on Earth?

    <p>It hosts all weather phenomena and supports life through its dynamic processes</p> Signup and view all the answers

    What can be inferred about the temperature profile of the Earth's atmosphere?

    <p>It stabilizes and then increases with altitude</p> Signup and view all the answers

    What is the primary consequence of the stabilization of temperature at the boundary between the troposphere and the stratosphere?

    <p>A barrier is formed, preventing warm air from escaping the troposphere.</p> Signup and view all the answers

    What is the direct result of the convection currents in the troposphere?

    <p>The distribution of heat around the globe.</p> Signup and view all the answers

    What is the primary factor influencing the varying thickness of the troposphere?

    <p>Earth's rotation.</p> Signup and view all the answers

    What is the characteristic of the troposphere that supports all life on Earth?

    <p>Its ability to support all weather phenomena.</p> Signup and view all the answers

    What is the significance of the temperature profile of the Earth's atmosphere?

    <p>It affects the Earth's climate.</p> Signup and view all the answers

    What is the primary driver of the convection currents in the troposphere?

    <p>The warming of the Earth's surface</p> Signup and view all the answers

    What is the approximate percentage of nitrogen in the air we breathe in the troposphere?

    <p>78.08%</p> Signup and view all the answers

    What is the characteristic of the troposphere that allows for the formation of clouds and weather patterns?

    <p>Its constant air movement</p> Signup and view all the answers

    What is the approximate rate of temperature decrease with altitude in the troposphere?

    <p>6.4°C/km</p> Signup and view all the answers

    What is the approximate altitude range of the troposphere at the equator?

    <p>12-18 km</p> Signup and view all the answers

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