| Learning Cycle: Earth's Dynamic Geosphere |
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Investigate
1. Use a can of your favorite carbonated soft drink to explore the quantity of gas that can be dissolved in a liquid under pressure.
- How many milliliters (mL) of liquid are in the can of soda?
- Predict how many milliliters of gas (carbon dioxide) a can of soda contains. Record and explain your prediction.
2. Obtain these materials: heat source, 1-liter Pyrex® beaker, water, rubber tubing (about 50 cm), smaller beaker or bottle, plastic container (shoebox size), modeling clay, safety goggles.
3. Devise a way to use the materials to measure the gas that escapes from the can of soda. Note: You will need to heat the soda after you have opened it. To do this safely, put the can in a water bath (container of water) and heat the water bath.
- Draw a picture of how you will set up your materials.
- Write down the procedures you will follow. Include the safety precautions you will take.
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4. After your teacher has approved your design, set up your materials. Run your experiment.
- Record your results.
- How do your results compare to your prediction?
- Describe anything that might have affected your results.
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