Overview
You should only choose from the materials suggested to complete your experiment, which include:
a freezer or cooler filled with ice
balloons
- string and metric ruler or measuring tapE Consider the following questions as you plan your investigation:
- What is your independent variable?
- What is your dependent variable?
What are your controls?
- How many trials will you conduct?
- How long will you need to let the balloon sit in the freezer before measuring the balloon Use these procedures as guidelines for your experiment.
- Fill each balloon with approximately the same amount of air.
- Use a marker to draw a line around each balloon.
- Place a string or measuring tape around the line and record the circumference of the balloon. If using string, you will need to measure the length of the string with a ruler.
Place the balloons in the freezer or cooler filled with ice.
- Re-measure the circumference of the balloon after some time.
- Clean your lab area by disposing of the balloons.
- Answer these questions in the introduction of your Lab Report:
What are some properties of gases?
What was the purpose of your experiment?
- Which equations did you use to calculate the radius and volume of the balloon?
- Answer these questions in the discussion and conclusion of your Lab Report:
What is the relationship between temperature and volume of a gas? Be sure to support your claim with evidence from your results.
Explain what happens to the particles in a gas when the temperature decreases. How does the particles’ change in motion explain your observations about the balloon’s volume?
What are some sources of error in your experiment?
- How could you modify this experiment?