Gr 9 NATUURWETENSKAPPE: HFST 4.4 Die stratosfeer

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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?

The discovery of the ozone hole (A) Signup and view all the answers

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

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

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

90% (C) Signup and view all the answers

Why do commercial airplanes fly in the lower stratosphere?

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

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

To absorb UV radiation (D) Signup and view all the answers

What is the main purpose of weather balloons?

To gather data on atmospheric conditions (B) Signup and view all the answers

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

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

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

Ozone cycle (D) Signup and view all the answers

What is the range of temperatures in the stratosphere?

-60°C to 0°C (D) Signup and view all the answers

What is the altitude range of the stratosphere?

12 km to 50 km (A) Signup and view all the answers

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

It is less dense and more stable (B) Signup and view all the answers

What do radiosondes on weather balloons measure?

Temperature, pressure, humidity, and wind speed (D) Signup and view all the answers

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

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

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

Above the troposphere and below the mesosphere (B) Signup and view all the answers

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

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

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

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

What is the relationship between CFCs and the ozone layer?

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

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

Ozone hole (D) Signup and view all the answers

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

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

Why was there a global ban on CFCs?

Because they depleted the ozone layer (C) Signup and view all the answers

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

Minimal turbulence in the stratosphere (B) Signup and view all the answers

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

A shield against harmful UV radiation (D) Signup and view all the answers

What is the primary impact of CFCs on the stratosphere?

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

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

Stable conditions (C) Signup and view all the answers

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

Ozone depletion (D) Signup and view all the answers

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

It increases the temperature with altitude (C) Signup and view all the answers

What is the primary purpose of radiosondes on weather balloons?

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

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

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

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

CFCs (D) Signup and view all the answers

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

Their impact on the ozone layer. (C) Signup and view all the answers

Gr 9 NATUURWETENSKAPPE: HFST 4.4 Die stratosfeer

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Questions and Answers

What was the primary use of Chlorofluorocarbons (CFCs)?

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

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

What led to a global ban on CFCs?

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

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

Why do commercial airplanes fly in the lower stratosphere?

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

What is the main purpose of weather balloons?

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

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

What is the range of temperatures in the stratosphere?

What is the altitude range of the stratosphere?

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

What do radiosondes on weather balloons measure?

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

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

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

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

What is the relationship between CFCs and the ozone layer?

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

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

Why was there a global ban on CFCs?

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

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

What is the primary impact of CFCs on the stratosphere?

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

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

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

What is the primary purpose of radiosondes on weather balloons?

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

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

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

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