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Numeracy Foundation November 2017 Unit 1 Q5

WJECFoundationCurrent spec4 marksDrawing & Using GraphsProperties of Numbers

5. The atmosphere above the Earth’s surface is divided into different layers.

The graph shows the average temperature at different heights above sea level.
It also shows the positions of the different layers of the atmosphere.

Graph of temperature (°C, from –100 to 60) against height above sea level (km, 0 to 140), showing the line “Temperature change with height” and the layers Troposphere, Tropopause, Stratosphere, Stratopause, Mesosphere, Mesopause and Thermosphere

Use the graph to answer the following questions.

(a) What is the approximate temperature 40 kilometres above sea level?
Circle your answer. [1]

–30˚C    10˚C    –22˚C    –18˚C    130˚C

(b) What is the lowest temperature shown in the mesosphere?
Circle your answer. [1]

105˚C    –105˚C    –80˚C    95 ˚C    –95 ˚C

(c) What is the approximate difference between the least and the greatest temperature shown in the troposphere? [2]