7.3.4 Global Warming

• Global warming is primarily caused by increased levels of greenhouse gases
• Ordering the main causes of global warming from most to least significant

  1️⃣ Burning fossil fuels

  2️⃣ Deforestation

  3️⃣ Agricultural practices

  4️⃣ Industrial processes
• Greenhouse gases absorb infrared radiation emitted by Earth's surface.


  True
• The greenhouse effect is a natural process that keeps Earth warm enough to support life
• What type of radiation do greenhouse gases absorb?

  Infrared radiation
• Match the type of greenhouse effect with its function and impact:

  Natural ↔️ Regulates Earth's temperature ||| Maintains habitable conditions

  Enhanced ↔️ Traps excessive heat ||| Causes global warming and climate change
• Methane is a potent greenhouse gas released from livestock farming, rice cultivation, and landfills
• Match the human activity with its impact on global warming:

  Burning fossil fuels ↔️ Releases carbon dioxide

  Deforestation ↔️ Reduces carbon absorption

  Agricultural practices ↔️ Produces methane
• Warmer temperatures can disrupt ecological relationships and food webs
• The melting of glaciers and sea ice contributes to rising sea levels.


  True
• What can decreased rainfall lead to?

  Water scarcity
• The melting of glaciers and sea ice contributes to rising sea levels
• Global warming is primarily caused by increased levels of greenhouse gases
• Deforestation reduces the number of plants that absorb carbon dioxide.


  True
• What is the main function of the natural greenhouse effect?

  Regulates Earth's temperature
• The key greenhouse gases include carbon dioxide, methane, nitrous oxide, and fluorinated gases
• Deforestation contributes to global warming by increasing carbon dioxide levels in the atmosphere.


  True
• Steps in the impact of global warming on ecosystems:

  1️⃣ Increased global temperatures

  2️⃣ Shifts in species ranges

  3️⃣ Altered precipitation patterns

  4️⃣ Melting glaciers and ice sheets

  5️⃣ Extreme weather events
• Extreme weather events caused by global warming can lead to significant biodiversity loss.


  True
• Match the mitigation strategy with its key benefit:

  Afforestation/Reforestation ↔️ Enhance carbon sinks

  Carbon capture technologies ↔️ Reduce atmospheric CO2

  Improve energy efficiency ↔️ Lower greenhouse gas emissions
• Burning fossil fuels releases greenhouse gases into the atmosphere.

  True
• Match the greenhouse gas with its primary source or effect:

  Carbon dioxide ↔️ Burning fossil fuels

  Methane ↔️ Livestock farming

  Nitrous oxide ↔️ Agricultural practices

  Fluorinated gases ↔️ Industrial refrigeration
• Carbon dioxide is the primary greenhouse gas and the largest contributor to global warming
• What is the greenhouse effect?

  Trapping heat in the atmosphere
• Human activities have increased the concentration of greenhouse gases in the atmosphere.


  True
• The key difference between the natural greenhouse effect and enhanced global warming is the amount of heat trapped
• Which greenhouse gas is the largest contributor to global warming?

  Carbon dioxide
• Fluorinated gases have a very high global warming potential.


  True
• What is one consequence of increased global temperatures?

  Habitat loss
• What is one impact of droughts on ecosystems?

  Water scarcity
• What type of extreme weather events can damage ecosystems?

  Hurricanes
• Increased rainfall can cause habitat destruction and species displacement.


  True
• What are examples of extreme weather events that damage ecosystems?

  Hurricanes, wildfires, heatwaves
• What is the main source of greenhouse gases from burning fossil fuels?

  Combustion of coal, oil, gas
• Match the type of radiation absorbed by greenhouse gases:

  Infrared radiation ↔️ Absorbed by greenhouse gases

  Ultraviolet radiation ↔️ Absorbed by ozone layer

  Visible light ↔️ Reflected by Earth's surface
• Human activities have enhanced the greenhouse effect, leading to global warming.


  True
• Which greenhouse gas is more potent than carbon dioxide in trapping heat?

  Methane
• What is released into the atmosphere when fossil fuels are burned?

  Carbon dioxide
• Melting glaciers and ice sheets contribute to rising sea levels
• What are key strategies for mitigating global warming?

  Reduce fossil fuel use