A 2L soda pop bottle is filled about one-third full with either liquid nitrogen or solid carbon dioxide (dry ice) and water. The bottle is sealed and a plastic bucket is placed on top. Do you think the liquid nitrogen or dry ice and water will make the bucket go higher? Can you explain the results using chemistry?
Have you ever wondered where the cloud comes from when dry ice is placed in water? If you think the answer is “atmospheric water vapor”, be sure to read this post because experimental evidence suggests that this explanation is wrong.
Addition of a white solid to a green solution causes the solution to separate into some truly beautiful colors...
You can perform an orange to black chemistry demonstration using materials commonly found in stores. The reaction appears to be similar to the Old Nassau reaction, but uses greener reagents. This is a great demonstration to do around Halloween time.
Modeling InstructionTM is specifically designed so students construct meaning without being told what to think and I needed videos that aligned with this philosophy. That’s when I ran across this TedEd talk with Dr. Derek Muller.
A few years ago, we launched a weather balloon during our summer science camp. The balloon reached an altitude of 30 km (100,000 ft)! Among other things, this project ended up being a great way to teach campers about the gas laws and how atmospheric pressure decreases with altitude.
I am fascinated by the chemistry of pennies. I have tried several experiments found in the Journal of Chemical Education.
In a previous post, I discussed the work of my grade 10 class as we read the non-fiction story, The Case of the Frozen Addicts. We've continued working our way through the book, taking one class every two weeks to delve into the issues presented. Just this week, we engaged in a fish-bowl discussion. To help steer the discussion, I started the class with a quick warm-up activity asking students to suggest topics or questions that they would want to talk through in the fish bowl.
In this Activity, students use written clues to determine the identities of 12 chemical compounds. They write the name and chemical formula for each compound, and find a consumer product in which each compound is present. This Activity increases student awareness of the presence of a variety of chemical compounds in a range of common consumer products.