Free Printable Bell Ringer 6.5 Greenhouse Gases and Ozone Layer

Worksheets

Bell Ringer 6.5 Greenhouse Gases and Ozone Layer

Total questions: 36

Worksheet time: 33mins

Name

Class

Date

1. What is the most abundant greenhouse gas in the atmosphere?

A) Carbon dioxide (CO₂)

B) Methane (CH₄)

C) Water vapor (H₂O)

D) Ozone (O₃)

2. Which human activity is primarily responsible for the increase in carbon dioxide (CO₂) levels?

A) Volcanic eruptions

B) Livestock farming

C) Burning fossil fuels

D) Anaerobic decomposition in wetlands

3. What natural process releases methane (CH₄) in wetlands?

A) Photosynthesis

B) Anaerobic decomposition

C) Volcanic eruptions

D) Evaporation

4. Which greenhouse gas is primarily released from agriculture due to nitrogen-based fertilizers?

A) Carbon dioxide (CO₂)

B) Methane (CH₄)

C) Nitrous oxide (N₂O)

D) Water vapor (H₂O)

5. Where does ozone (O₃) naturally form to protect life on Earth?

A) In the troposphere

B) In the oceans

C) In the stratosphere

D) In forests

6. Which greenhouse gas is primarily released through volcanic eruptions and respiration?

A) Nitrous oxide (N₂O)

B) Methane (CH₄)

C) Carbon dioxide (CO₂)

D) Ozone (O₃)

7. What is the main source of human-caused HCFCs and HFCs emissions?

A) Vehicle emissions

C) Deforestation

B) Refrigeration and air conditioning

D) Burning fossil fuels

8. What human activity contributes to both deforestation and an increase in atmospheric carbon dioxide (CO₂)?

A) Agriculture

B) Livestock farming

C) Burning fossil fuels

D) Cutting down forests

9. Which greenhouse gas is significantly emitted through the digestive processes of livestock?

A) Methane (CH₄)

B) Carbon dioxide (CO₂)

C) Nitrous oxide (N₂O)

D) Ozone (O₃)

10.

10.What human activity is primarily responsible for the release of nitrous oxide (N₂O)?

A) Deforestation

B) Use of nitrogen-based fertilizers

C) Volcanic eruptions

D) Respiration from animals and plants

11.

11. Where is the ozone layer located?

A) Troposphere

B) Stratosphere

C) Mesosphere

D) Thermosphere

12.

12. What is the primary function of stratospheric ozone?

A) To trap heat in the atmosphere

B) To block ultraviolet (UV) radiation

C) To produce oxygen for living organisms

D) To form clouds

13.

13. How is ground-level ozone primarily formed?

A) Through volcanic eruptions

B) From the reaction of sunlight with carbon dioxide

C) From the reaction of sunlight with volatile organic compounds (VOCs) and nitrogen oxides (NOx)

D) From the breakdown of water vapor

14.

14. Which of the following is a disadvantage of ground-level ozone?

A) It protects against UV radiation

B) It contributes to climate regulation

C) It can cause respiratory problems

D) It supports plant growth

15.

15. What is a major contributor to ozone depletion in the stratosphere?

A) Methane emissions

B) Carbon dioxide

C) Chlorofluorocarbons (CFCs)

D) Nitrogen oxides

16.

16. How would life on Earth be affected if the atmosphere did NOT contain greenhouse gases?

A) There would likely be a few less organisms on Earth because the lack of greenhouse gases would make Earth little cooler.

B) There would likely not be life on Earth because Earth's surface would be much hotter without the Sun's rays being blocked.

C)There would likely be more diverse life on Earth because the lack of greenhouse gases would make Earth just a little warmer.

D) There would likely not be life on Earth because its surface would be much colder and Earth's water would be frozen

17.

17. Which of the following best explains the positive feedback loop involving water vapor and the greenhouse effect?

A) Water vapor directly contributes to global cooling.

B) As temperature increases, more water vapor is absorbed into the atmosphere, enhancing the greenhouse effect.

C) The more water vapor evaporates, the less heat is trapped in the atmosphere.

D) Water vapor levels remain constant despite changes in temperature.

18.

18. What would be the likely outcome if human activities stopped contributing to greenhouse gases like CO₂, CH₄, and N₂O?

A) Natural sources would continue to cause significant long-term global warming.

B) The concentration of these gases would immediately decrease, ending global warming.

C) The greenhouse effect would still persist, but at a reduced rate compared to current levels.

D) Methane and nitrous oxide would completely disappear from the atmosphere.

19.

19. Why are HCFCs and HFCs considered more problematic despite their lower abundance compared to CO₂?

A) They occur naturally and cannot be controlled by human intervention.

B) They are less effective at trapping heat than CO₂, but are released in greater quantities.

C) They are synthetic and have a higher heat-trapping capacity, contributing significantly to global warming

D) They break down more quickly than CO₂, resulting in more frequent releases.

20.

20. Which of the following human activities most directly limits Earth's ability to regulate the concentration of CO₂ in the atmosphere?

A) Agriculture and livestock farming

B) Deforestation

C) Use of nitrogen-based fertilizers

D) Production of HFCs and HCFCs for refrigeration

21.

The graph shows changes in carbon dioxide

(CO2) concentrations and surface temperatures

on Earth from the years 1880 to 2000.

Why do carbon dioxide concentrations and

surface temperatures show the relationship seen

in the graph?

because lower carbon dioxide levels mean more

heat is retained in Earth's atmosphere

because higher carbon dioxide levels mean

more heat is retained in Earth's atmosphere

because lower carbon dioxide levels mean less

heat is retained in Earth's atmosphere

because higher carbon dioxide levels mean less

heat is retained in Earth's atmosphere

22.

Which of the following is not a greenhouse gas? (a)

Choose from the below words

Methane

Carbon Dioxide

Nitrogen

Nitrous Oxide

23.

Which has increased at about the same rate as global temperatures over the past 100 years?

Sunlight reaching Earth

Volcanic eruptions

Tree rings

Carbon dioxide

24.

The two greenhouse gases that have the greatest impact on climate change are (a)

Choose from the below words

Chlorofluorocarbons and methane

Methane and water vapor

Methane and carbon dioxide

25.

The graph shows changes in carbon dioxide (CO₂) concentrations and surface temperatures on Earth from 1880 to 2000. Why do carbon dioxide concentrations and surface temperatures show this relationship?

Lower carbon dioxide levels mean more

heat is retained in Earth's atmosphere

Higher carbon dioxide levels mean

more heat is retained in Earth's atmosphere

Hhigher carbon dioxide levels mean less

heat is retained in Earth's atmosphere

26.

Greenhouses gases

Absorb and radiate heat

Destroy the ozone layer

Cause respiratory problems

Create smog

27.

Over the past 200 years, the level of carbon dioxide in the atmosphere has

decreased slightly.

increased until recently, and then decreased.

increased steadily.

stayed about the same.

28.

What inference can be made about GHG and global temperature?

As GHG increases, the average global temperature will continue to increase.

The temperatures have risen and show no sign of decreasing.

If GHG do not decline, the Earth will be too warm to support life.

Global temperatures have risen substantially over the last 130 years.

29.

What is the primary reason for the increase in methane (CH₄) levels in the atmosphere?

D) Oceanic release

C) Deforestation

B) Livestock digestion

A) Industrial emissions

30.

How does deforestation contribute to climate change?

C) By enhancing soil fertility

A) By increasing oxygen levels

D) By decreasing methane emissions

B) By reducing carbon dioxide absorption

31.

Air pollution is a mixture of (a) particles and (b) in the air

Choose from the below words

solid

gases

liquid

healthy

32.

Match the following problem with its definition

Global Warming

Earth's Temperatures are increasing

Ozone Depletion

The protective O₃ gas layer is destroyed

Loss Of Biodiversity

Organisms are going extinct

Bio-magnification

Toxins are concentrated in top consumers

33.

Match the following problem with its positive action we can take to stop this

Global Warming

Alternative Energy (Solar, Wind, Hydro)

Ozone Depletion

Ban use of CFC in spray cans

Loss of Biodiversity

Make laws

Bio-Magnification

Biological Controls

34.

Match the following

Erosion

Urbanization

Deforestation

Air/Water Quality

Desertification

35.

As the human population (a) , the quality of the environment (b) .

Choose from the below words

increases

decreases

levels off

36.

True or False? Humans affect the environment but the environment does NOT affect us.

True

False

100 %

Bell Ringer 6.5 Greenhouse Gases and Ozone Layer

Total questions: 36

Worksheet time: 33mins

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