Grade Level: 6th to 8th; Type: Physics
This project determines how temperature affects the volume of gas in a balloon.
How does heat affect the volume of gas in a balloon?
How does cold affect the volume of gas in a balloon?
- 2 latex balloons
- 2 empty 2-Liter soda bottles
- Access to a refrigerator/freezer
- Pan of hot water
- Poster board
- Pen or pencil
- Lab notebook
- Pull the neck of a balloon over the mouth of one of the bottles and place it in the refrigerator.
- Pull the neck of a balloon over the mouth of the second bottle and place the bottle into a pan of hot water. How is the heat affecting the balloon. Note your observations.
- Predict what you think the balloon in the refrigerator will look like. Then, open the refrigerator and take a look. What happened to the balloon? Did it match your prediction of what would happen?
- Now place both bottles in the freezer.
- After several minutes, check on the balloons. How did the extreme cold affect both? Record your observations.
- Use a piece of poster board and markers to sketch the balloons in each state in order to illustrate your results.
Terms/Concepts: temperature, volume of gas, density, matter
References: Science Projects About the Physics of Toys and Games, by Robert Gardner (Enslow Publishers, Inc., 2000).