Frequently Purchased Together
Your science lab will be in the kitchen this time. It has the water, the space, the materials, and the tools you need. You’ll discover amazing reactions that have always been hiding right in front of you. They just needed a little coaxing by the right tools and your curiosity to reveal themselves. Some things sink and some things float. You’ll mix chemicals you have in the cupboards right now (e.g. baking soda) and achieve unexpected color changes in liquids. You’ll make some very interesting – and fun – discoveries using straws. How about dancing raisins, stinky solutions, and lots of gas? It’s all in here!
How Does It Work?
This kit moves into the kitchen lab found in nearly every home. There are pH tests to determine whether a variety of household solutions are acids or bases. These tests are done by using a simple, homemade solution and test strips that change colors to reveal the pH. Since it’s an important science concept, density is revisited in terms of buoyancy through simple sink/float tests done in the kitchen sink. A simple table helps teach data analysis which is an important lab skill. A drinking straw reveals static electricity, adhesion and cohesion, and strange vibrations that will appeal to double reed players. On the fun side, edible “Sewer Slugs” make an appearance to rivet attention on the science of nucleation points, CO2 gas, and buoyancy.
Science Fair Connections
To develop a science fair project, you need to identify and test variables. A variable is something you change that might alter the results of the experiment. A valid test keeps everything else the same except the single variable being tested. Here are some examples of variables you could test with the “Sink or Float” activity:
- Everything is kept the same for a float test except the depth of the water in the basin. That’s the only way to determine fairly if the water depth makes any difference in whether a can sinks or floats. Be sure to use the same basin for each depth test.
- Changing the water temperature might make a difference in whether a soda can sinks or floats. What kind of test will you need to devise to make those discoveries?
- What happens in other liquids such as distilled water, vegetable oil, soda, salt water, milk, or juices? How does using different liquids for the test change the results you see?
- How might the temperature of the test soda change things? NOTE: Never use a microwave or oven to warm a can of soda. Dunk it in hot water for a few minutes. The target temperature is 85℉ (29℃).