Question

called trace gases
concentration of gases in
earths atmosphere
based on the graph, which of the following are true? select all that apply.
there are over three times as many particles of nitrogen in the
atmosphere as of all the other gases combined.
earths atmosphere contains about three and a half times as many oxygen
particles as nitrogen particles.
carbon dioxide makes up less than 1% of the gas particles in earths
atmosphere.
for every ten particles of oxygen in earth’s atmosphere, there is about one
particle of carbon dioxide.

Explanation:

Step1: Calculate the percentage of other gases combined

The percentage of other gases combined is \(100\% - 78\%=22\%\).
Since \(78\%>3\times22\% = 66\%\), the first statement is true.

Step2: Compare the percentage of oxygen and nitrogen

The percentage of oxygen is \(21\%\) and the percentage of nitrogen is \(78\%\).
Since \(21\%<78\%\), the second statement is false.

Step3: Check the percentage of carbon dioxide

The percentage of carbon dioxide is \(0.04\%<1\%\), so the third statement is true.

Step4: Compare the ratio of oxygen and carbon dioxide

The ratio of oxygen (\(21\%\)) to carbon dioxide (\(0.04\%\)) is \(\frac{21}{0.04}=525\).
For every ten particles of oxygen, the number of carbon - dioxide particles is \(\frac{10\times0.04}{21}\approx0.019
eq1\), so the fourth statement is false.

Answer:

The first and third statements are true.