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Greenhouse Effect With the aid of a labelled diagram explain the greenhouse effect. - Junior Cycle Geography - Question C - 2013
Question C
Greenhouse Effect With the aid of a labelled diagram explain the greenhouse effect.
Worked Solution & Example Answer:Greenhouse Effect With the aid of a labelled diagram explain the greenhouse effect. - Junior Cycle Geography - Question C - 2013
Step 1
Labelled Diagram
Answer
The diagram should depict the Earth, the Sun, greenhouse gases (e.g., carbon dioxide and methane) in the atmosphere, and arrows showing incoming solar radiation and outgoing infrared radiation. Solar radiation from the Sun reaches the Earth, where some is absorbed and some is reflected back into space.
Step 2
Explaination 1: Insulation of Heat
Answer
The greenhouse effect occurs when the Earth's atmosphere traps some of the heat from the Sun. Solar radiation passes through the atmosphere and reaches the Earth's surface, warming it. This energy is then re-radiated in the form of infrared radiation.
Step 3
Explaination 2: Role of Greenhouse Gases
Answer
Greenhouse gases, such as carbon dioxide (CO₂) and methane (CH₄), absorb and re-emit infrared radiation, preventing it from escaping back into space. This leads to an increase in the Earth's average temperature, contributing to global warming and climate change.