Understandings:
4.4.U1: Carbon dioxide and water vapour are the most significant greenhouse gases.
4.4.U2: Other gases including methane and nitrogen oxides have less impact. [The harmful consequences of ozone depletion do not need to be discussed and it should be made clear that ozone depletion is not the cause of the enhanced greenhouse effect.]
4.4.U3: The impact of a gas depends on its ability to absorb long wave radiation as well as on its concentration in the atmosphere. [Carbon dioxide, methane and water vapour should be included in discussions.]
4.4.U4: The warmed Earth emits longer wavelength radiation (heat).
4.4.U5: Longer wave radiation is absorbed by greenhouse gases that retain the heat in the atmosphere.
4.4.U6: Global temperatures and climate patterns are influenced by concentrations of greenhouse gases.
4.4.U7: There is a correlation between rising atmospheric concentrations of carbon dioxide since the start of the industrial revolution 200 years ago and average global temperatures.
4.4.U8: Recent increases in atmospheric carbon dioxide are largely due to increases in the combustion of fossilized organic matter.
Applications:
4.4.A1: Threats to coral reefs from increasing concentrations of dissolved carbon dioxide.
4.4.A2: Correlations between global temperatures and carbon dioxide concentrations on Earth.
4.4.A3: Evaluating claims that human activities are not causing climate change.
4.4.U1: Carbon dioxide and water vapour are the most significant greenhouse gases.
4.4.U2: Other gases including methane and nitrogen oxides have less impact. [The harmful consequences of ozone depletion do not need to be discussed and it should be made clear that ozone depletion is not the cause of the enhanced greenhouse effect.]
4.4.U3: The impact of a gas depends on its ability to absorb long wave radiation as well as on its concentration in the atmosphere. [Carbon dioxide, methane and water vapour should be included in discussions.]
4.4.U4: The warmed Earth emits longer wavelength radiation (heat).
4.4.U5: Longer wave radiation is absorbed by greenhouse gases that retain the heat in the atmosphere.
4.4.U6: Global temperatures and climate patterns are influenced by concentrations of greenhouse gases.
4.4.U7: There is a correlation between rising atmospheric concentrations of carbon dioxide since the start of the industrial revolution 200 years ago and average global temperatures.
4.4.U8: Recent increases in atmospheric carbon dioxide are largely due to increases in the combustion of fossilized organic matter.
Applications:
4.4.A1: Threats to coral reefs from increasing concentrations of dissolved carbon dioxide.
4.4.A2: Correlations between global temperatures and carbon dioxide concentrations on Earth.
4.4.A3: Evaluating claims that human activities are not causing climate change.
WATCH VIDEO: Mr Leonard's IB Biology Video Course - 4.4 Climate Change and use the PPT slide notes to annotate and make notes on the video.
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The website below takes you to an interactive site exploring the impacts on the Great Barrier Reef.
https://www.theguardian.com/environment/ng-interactive/2014/mar/great-barrier-reef-obituary
Additional Video: Ocean Acidification
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