5 Soap Soufflé Materials: Bar of soap, microwave and microwavable plate Safety Precautions: always ask an adult before using the microwave and let the soap cool down for at least five minutes before touching it. Do not eat the soap!
6 Procedure: Unwrap a bar of soap and place it on a microwave safe plate Microwave the bar of soap for about 2 minutesObserve and record results
9 Inferences A bar of soap has lots of tiny pockets of air When air is heated it expandsThe expanding air pockets cause the bar of soap to turn into a foamFoam is: a substance that is formed by trapping tiny pockets of gas in a liquid or solid
11 Turn up the heatQuestions: What happens to air when it is heated? What happens to air when it is cooled?
12 Turn up the heatMaterials: 2 glass bottle, 2 small balloons, 2 tubs for holding water, 2 thermometers, hot water and a bag of ice
13 Procedure:Place a thermometer in each bottle. Record the temperature belowSecure a small balloon over each bottleLabel one bottle “A” and the other “B”Fill one tub with hot waterFill the other with cold water or icePlace one bottle in each tubObserve and record the temperatures below
14 DiagramInclude the 2 bottles and what they looked like
15 Question:Did the AMOUNT of air change in either of the bottles? Explain:No. When the air is heated, the molecules get more excited and take up more space. So the air expands. The air is just increasing in SIZE not amount.
16 So what is in air anyways? Air is composed of different gases. But what are the gases?We will put some steel wool in a test tube and submerge it in water to investigate one of the gases that make up air…Come tomorrow to find out what the name of that gas is…