Question

the circle graph below shows the concentrations of the gases that make up earths atmosphere, except for water vapor. the concentration is the amount of particles in a given volume and is shown here as a percentage of the total number of gas particles in the atmosphere. gases present at concentrations less than 1%, such as carbon dioxide, are called trace gases. concentration of gases in earths atmosphere pie chart with labels: nitrogen 78%, oxygen 21%, carbon dioxide 0.04%, other trace gases 0.96% based on the graph, which of the following are true? select all that apply. 1. carbon dioxide makes up less than 1% of the gas particles in earths atmosphere. 2. for every ten particles of oxygen in earths atmosphere, there is about one particle of carbon dioxide. 3. there are over three times as many particles of nitrogen in the atmosphere as of all the other gases combined. 4. earths atmosphere contains about three and a half times as many oxygen particles as nitrogen particles.

Explanation:

Step1: Analyze Carbon Dioxide Percentage

Check the percentage of carbon dioxide from the graph. It's 0.04%, which is less than 1%. So the first statement is true.

Step2: Analyze Oxygen vs Carbon Dioxide Ratio

Oxygen is 21%, carbon dioxide is 0.04%. The ratio of oxygen to carbon dioxide is $\frac{21}{0.04} = 525$, not 10:1. So the second statement is false.

Step3: Analyze Nitrogen vs Other Gases

Nitrogen is 78%, other gases combined: 21 + 0.04 + 0.96 = 22%. 78 > 3*22 (66), so over three times. Third statement is true.

Step4: Analyze Oxygen vs Nitrogen Ratio

Oxygen is 21%, nitrogen is 78%. The ratio of oxygen to nitrogen is $\frac{21}{78} \approx 0.27$, not 3.5. So the fourth statement is false.

Answer:

• Carbon dioxide makes up less than 1% of the gas particles in Earth’s atmosphere.
• There are over three times as many particles of nitrogen in the atmosphere as of all the other gases combined.