Plant a Tree – Make Yourself Air

Plant a Tree – Make Yourself Air

Activity 1. Air Composition Research

 

You will work as a team to investigate the composition of the air according to set values.

  1. Work in groups of four.
  2. Study the air chemistry data shown in the table on Worksheet 1. Air. Complete the tasks and answer the questions:
    • List all the constituents of air, ordering them by the most common in both volume and mass.
    • Which gas makes up most of the air?
    • Which gases make up less than 1% of the air volume?

Substance

 Volume %

Mass %
N2 78,084 % 75,51 %
O2 20,946 % 23,16 %
Ar 0,934 % 1,28 %
CO2 0,033 % 0,05 %
Ne 0,001 818 % 0,001 212 %
He 0,000 524 % 0,000 072 %
CH4 0,000 2 % 0,000 1 %
Kr 0,000 114 % 0,000 3 %
NO2 0,000 05 % 0,000 05 %
H2 0,000 05 % 0,000 001 %
Xe 0,000 008 7 % 0,000 04 %

Source: air | Physical and Chemical Properties of Air (converter.cz) https://www.converter.cz/tabulky/vzduch.html

 

3. The density of dry air strongly depends on its temperature. This dependence is depicted in the graph of dry air density versus temperature. Analyse the data shown and answer the questions.

    • How does the density of air change as the temperature increases?
    • Is air density linearly related to temperature?
    • What is the density of dry air at 20°C?

Source: https://www.climate.gov/news-features/understanding-climate/climate-change-atmospheric-carbon-dioxide

 

 

To download: Worksheet 1. Air