The graph in Figure 14 shows the variation in atmospheric pressure with the height above sea level - Edexcel - GCSE Physics - Question 7 - 2018 - Paper 1
Question 7
The graph in Figure 14 shows the variation in atmospheric pressure with the height above sea level.
(i) Use the graph to estimate the atmospheric pressure at 3000 m... show full transcript
Worked Solution & Example Answer:The graph in Figure 14 shows the variation in atmospheric pressure with the height above sea level - Edexcel - GCSE Physics - Question 7 - 2018 - Paper 1
Step 1
Use the graph to estimate the atmospheric pressure at 3000 m above sea level.
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Answer
From the graph, at 3000 m, the atmospheric pressure can be estimated to be around 700 kPa.
Step 2
Use the graph to estimate the atmospheric pressure at 6000 m above sea level.
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Answer
At 6000 m above sea level, the atmospheric pressure, according to the graph, is approximately 500 kPa.
Step 3
Suggest a reason why the atmospheric pressure decreases with height above sea level.
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Answer
Atmospheric pressure decreases with height because there is less air above you as you ascend, which results in a lower weight of the air column above. Additionally, the density of air decreases with increasing altitude, leading to a reduction in pressure.
