Gr 9 NATUURWETENSKAPPE: HFST 4.4 Die stratosfeer

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Questions and Answers

What was the primary use of Chlorofluorocarbons (CFCs)?

  • In agricultural pesticides and fertilizers
  • In computer manufacturing and software development
  • In industrial processes and refrigerants (correct)
  • In medical treatments and cleaning products

What happens when chlorine atoms from CFCs react with ozone molecules?

  • They create more ozone molecules
  • They have no effect on ozone molecules
  • They convert ozone molecules into a different substance
  • They destroy ozone molecules (correct)

What is the term for the thinning of the ozone layer, particularly over Antarctica?

  • Ozone hole (correct)
  • UV radiation increase
  • Ozone depletion
  • Chlorine reaction

What led to a global ban on CFCs?

<p>The discovery of the ozone hole (A)</p> Signup and view all the answers

What is the result of the reduction of the stratosphere's ability to absorb UV radiation?

<p>More UV radiation reaches the Earth's surface (B)</p> Signup and view all the answers

What percentage of the atmosphere's mass is contained in the troposphere and stratosphere?

<p>90% (C)</p> Signup and view all the answers

Why do commercial airplanes fly in the lower stratosphere?

<p>Due to the stability of the air in the stratosphere (A)</p> Signup and view all the answers

What is the primary function of the ozone layer in the stratosphere?

<p>To absorb UV radiation (D)</p> Signup and view all the answers

What is the main purpose of weather balloons?

<p>To gather data on atmospheric conditions (B)</p> Signup and view all the answers

What is the result of the ozone layer on the temperature in the stratosphere?

<p>It causes the temperature to increase with altitude (D)</p> Signup and view all the answers

What is the process by which ozone molecules are formed and destroyed in the stratosphere?

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

What is the range of temperatures in the stratosphere?

<p>-60°C to 0°C (D)</p> Signup and view all the answers

What is the altitude range of the stratosphere?

<p>12 km to 50 km (A)</p> Signup and view all the answers

What is the primary characteristic of the air in the stratosphere?

<p>It is less dense and more stable (B)</p> Signup and view all the answers

What do radiosondes on weather balloons measure?

<p>Temperature, pressure, humidity, and wind speed (D)</p> Signup and view all the answers

What is the result of the formation and destruction of ozone in the stratosphere?

<p>It absorbs UV radiation, shielding the Earth (C)</p> Signup and view all the answers

What is the position of the stratosphere in relation to the troposphere and mesosphere?

<p>Above the troposphere and below the mesosphere (B)</p> Signup and view all the answers

What is the effect of the ozone layer on the temperature in the stratosphere?

<p>It causes the temperature to increase with altitude (D)</p> Signup and view all the answers

What is the primary consequence of the reaction between chlorine atoms from CFCs and ozone molecules?

<p>Reduction of the stratosphere's ability to absorb UV radiation (A)</p> Signup and view all the answers

What is the relationship between CFCs and the ozone layer?

<p>CFCs catalytically destroy ozone molecules, reducing the ozone layer (C)</p> Signup and view all the answers

What is the term used to describe the thinning of the ozone layer, particularly over Antarctica?

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

What is the result of the destruction of ozone molecules by chlorine atoms from CFCs?

<p>More UV radiation reaches the Earth's surface (B)</p> Signup and view all the answers

Why was there a global ban on CFCs?

<p>Because they depleted the ozone layer (C)</p> Signup and view all the answers

What is the primary reason for the stability of the stratosphere?

<p>Minimal turbulence in the stratosphere (B)</p> Signup and view all the answers

What is the result of the formation and destruction of ozone in the stratosphere?

<p>A shield against harmful UV radiation (D)</p> Signup and view all the answers

What is the primary impact of CFCs on the stratosphere?

<p>They release chlorine atoms that react with ozone molecules. (D)</p> Signup and view all the answers

What characteristic of the stratosphere allows weather balloons to gather data effectively?

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

What is the term used to describe the destruction of ozone molecules by chlorine atoms from CFCs?

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

What is the effect of the ozone layer on the temperature gradient in the stratosphere?

<p>It increases the temperature with altitude (C)</p> Signup and view all the answers

What is the primary purpose of radiosondes on weather balloons?

<p>To transmit information on temperature, pressure, humidity, and wind speed (C)</p> Signup and view all the answers

What is the direct consequence of the reaction between chlorine atoms from CFCs and ozone molecules?

<p>Increased UV radiation absorption in the stratosphere. (A)</p> Signup and view all the answers

What is the primary driving force behind the thinning of the ozone layer, particularly over Antarctica?

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

What is the primary reason behind the global ban on CFCs?

<p>Their impact on the ozone layer. (C)</p> Signup and view all the answers

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