9.2 Carbon dioxide and methane as greenhouse gases

• Methane has a longer lifespan but is less potent than carbon dioxide.

  False
• The greenhouse effect is a natural process that warms the Earth, making it habitable
• Steps in the greenhouse effect

  1️⃣ Incoming solar radiation

  2️⃣ Absorption and reflection

  3️⃣ Emission as infrared radiation

  4️⃣ Trapping of infrared radiation

  5️⃣ Warming of the planet
• Greenhouse gases absorb ultraviolet radiation to warm the Earth.

  False
• Greenhouse gases such as carbon dioxide and methane trap infrared radiation, preventing it from escaping into space
• What is the greenhouse effect?

  Warming Earth naturally
• The greenhouse effect is essential for life on Earth.


  True
• Match the source of carbon dioxide with its description:

  Combustion of fossil fuels ↔️ Releases CO2 from burning coal, oil, and natural gas

  Deforestation ↔️ Releases stored carbon by cutting down forests
• Natural gas leaks release methane directly into the atmosphere.


  True
• The decay of organic matter in landfills generates methane emissions.
• Which greenhouse gas is primarily released by burning fossil fuels?

  Carbon Dioxide (CO2)
• Greenhouse gases prevent infrared radiation from escaping into space.


  True
• Leaks from natural gas systems release methane into the atmosphere.
• Reducing methane emissions is essential for mitigating climate change.

  True
• Methane is a potent greenhouse gas that contributes to global warming
• Reducing methane emissions is essential to mitigate climate change.

  True
• Match the greenhouse gas with its 100-year global warming potential:

  Carbon Dioxide (CO2) ↔️ 1

  Methane (CH4) ↔️ 28-36
• Methane is a more potent greenhouse gas than CO2.


  True
• What is the impact of methane emissions on global warming?

  Less significant than CO2
• Improving energy efficiency in buildings reduces greenhouse gas emissions.


  True
• What are the major differences between carbon dioxide and methane?

  Sources and impacts
• Methane is primarily released through human activities like burning fossil fuels.

  False
• Greenhouse gases prevent infrared radiation from escaping into space
• Steps in the greenhouse effect process

  1️⃣ The Earth receives solar radiation, some of which is absorbed by the surface and atmosphere

  2️⃣ The Earth's surface emits infrared radiation (heat)

  3️⃣ Greenhouse gases absorb much of this infrared radiation

  4️⃣ The trapped heat is emitted back to Earth, warming the atmosphere
• Greenhouse gases are gases in the Earth's atmosphere that absorb and emit infrared radiation, trapping heat and warming the planet
• Match the greenhouse gas with its primary source:

  Carbon Dioxide ↔️ Combustion of fossil fuels

  Methane ↔️ Livestock farming
• Greenhouse gases prevent infrared radiation from escaping into space.


  True
• Increased concentrations of greenhouse gases can lead to enhanced warming and climate change
• Match the greenhouse gas with its impact:

  Carbon Dioxide ↔️ Major contributor to global warming

  Methane ↔️ Shorter lifespan but more potent
• The greenhouse effect is essential for maintaining a temperature suitable for life on Earth.


  True
• Steps in the greenhouse effect process

  1️⃣ The Earth receives solar radiation

  2️⃣ The Earth's surface emits infrared radiation

  3️⃣ Greenhouse gases absorb infrared radiation

  4️⃣ Heat is emitted back to Earth
• Carbon dioxide is a major greenhouse gas that contributes to global warming.
• Methane has a shorter lifespan in the atmosphere compared to carbon dioxide.
• Which animals produce methane through their digestive processes?

  Ruminant animals
• Match the greenhouse gas with its impact:

  Carbon Dioxide (CO2) ↔️ Major contributor to global warming

  Methane (CH4) ↔️ More potent but shorter lifespan than CO2
• Methane is more potent than carbon dioxide as a greenhouse gas.
• What are the three main sources of carbon dioxide emissions?

  Fossil fuels, deforestation, industry
• Steps involved in methane production by ruminant animals

  1️⃣ Animals digest food

  2️⃣ Digestive processes produce methane

  3️⃣ Methane is released into the atmosphere
• Which industrial materials emit substantial amounts of CO2?

  Steel
• Match the methane source with its description:

  Natural gas leaks ↔️ Leaks from production systems

  Livestock farming ↔️ Digestive processes in ruminants

  Decay of organic matter ↔️ Anaerobic decomposition in landfills