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physical-chemical change


The surface of a pool of water freezes first. Then why do you usually find large bubbles of air under the ice?

What is Smoke?

I have been doing shows on the Science of Fire, so I thought we would do a fire related experiment.

As with all experiments that use fire, BE CAREFUL AND SAFE. Follow proper safety procedures and think about things before you try them. You should also have another adult with you, just in case you have an accident. That way, you have someone else to blame.

For our experiment, we are going to take a look at smoke. What is smoke made of? To find out, you will need:

A Hot Change

We have taken a brief look at an endothermic process, seeing that dissolving epsom salts in water lowered the temperature of the water. This week, we will examine a process that is exothermic, which means that it gives off heat. To try this, you will need:

The Science of Spit

This experiment comes from our cat, Mawra. She is a delightful cat, but when she is very happy, she drools. She was happily sitting in my lap while I was thinking of topics for this week's experiment. That's when it hit me. (Literally) Saliva! To learn more about spit, you will need:

Cleaning the Silver

This week's experiment is a simple chemistry experiment that you can use to clean the silver. Be sure to get permission before doing this. While it may seem a nice surprise, some silver is not meant to be cleaned, so be sure to ask first.

Potato Water

This experiment is a variation of several that we have tried in the past. It deals with something called osmosis. To find out more about this important part of the process of life, you will need: