Thursday

We discussed physical properties of objects. Physical properties are properties observed through the use of our senses. Some physical properties are color, hardness, luster, density, odor, conduction of electricity and sensitivity to magnets. We played a game, "I spy with my little eye," using the physical properties of objects.

Next we went into the lab and studied the difference between physical changes and chemical changes. Physical changes mean that the object does not lose its identity. Ice cubes melting, water boiling into steam, water freezing, tearing paper, drawing on paper, all of these are physical changes because the object is still paper or is still water.

Chemical changes create a new identity. Metal rusting, rust has different properties than metal, it is less dense and it changes color. We put baking soda in a bottle and vinegar in a balloon and then attached the balloon to the bottle. It was fun to see the balloon grow as a gas was given off. Then we answered the question, Why is the gas given off by boiling water not a chemical change, but gas given off by the baking soda and vinegar was a chemical change. Go to My Links on the right side and review the links of physical and chemical changes.

Please remember to get your fund raiser emails done. All people have to do is shop at the places listed and the school will earn money. It is so much safer than going door to door selling wrapping paper!