How to draw line graph for showing changes in test tubes while showing that exhaled air contains more carbon dioxide than inhaled air

To draw a line graph that shows the changes in test tubes by indicating that exhaled air contains more carbon dioxide than inhaled air, you will need to follow these steps:

1. Make a table: Create a table with two columns. Label the first column "Time" and the second column "Carbon Dioxide Level."

2. Decide on time intervals: Determine the time intervals you want to measure. For example, you may choose to record the carbon dioxide levels at 5-minute intervals.

3. Measure and record carbon dioxide levels: Use a carbon dioxide sensor or any other appropriate measurement tool to measure the carbon dioxide levels in the test tubes. Record the readings in the "Carbon Dioxide Level" column of the table at each time interval.

4. Label the axes: On a graph paper or a computer software, draw the x and y axes. The x-axis represents time, and the y-axis represents the carbon dioxide level.

5. Plot the points: Plot the data points from the table on the graph by placing a dot at the appropriate intersection of the time interval on the x-axis and the corresponding carbon dioxide level on the y-axis. Repeat this for each data point.

6. Connect the dots: Once all the points are plotted, use a ruler or a line tool to draw a straight line that connects the dots. Make sure the line passes through all the points.

7. Label the graph: Add a title to the graph, such as "Changes in Carbon Dioxide Levels in Test Tubes." Label the x-axis as "Time (minutes)" and the y-axis as "Carbon Dioxide Level (ppm)."

8. Highlight inhaled and exhaled air: Using different colors or patterns, shade the area under the line graph between the recorded time intervals when inhaled and exhaled air samples were taken. This will help visualize and emphasize the difference in carbon dioxide levels between the two types of air.

Remember to include a key or a legend to explain the meaning of the different colored or patterned areas.

By following these steps, you can create a line graph that clearly illustrates the changes in carbon dioxide levels in test tubes while showing that exhaled air contains more carbon dioxide than inhaled air.