Atmosphere, air pressure and air temperature
Answers are for parents and teachers.
1
At ground level it is +20 °C. What is the temperature at 4000 m (in the troposphere)?
-4
2
Sea-level pressure is 760 mm of mercury. What is the approximate pressure at a place 800 m high?
680
3
Eight readings were taken in a day: 0, 2, 6, 10, 12, 8, 4, 6 °C. Find the daily mean.
6
4
Write at least three sentences about why the atmosphere matters for Earth.
It supplies oxygen, evens out temperature, protects from ultraviolet rays and meteors and drives the water cycle.
5
Why does water boil below 100 °C high in the mountains? Think and write your idea.
At height air pressure is lower, so water boils at a lower temperature.