Heavy Metals

Lately we have been doing our Science fair in class. I enjoyed making the slides online. The thing I found tricky was seeing if there was dirt or copper on the metals.

Fizz,Foam and Froth

We are learning about chemical reactions. I enjoyed seeing the reaction after we set it off bubbling or fizzing. The thing I found challenging was writing the explanation.

Have you ever wondered what makes fizz, foam and froth ?

A physical change is reversible  but a chemical change irreversible. This is a physical change; 

water can be changed into ice and then it can melt back into water.

For a chemical reaction, there is no turning back! 

When you add vinegar and baking soda together you get a chemical reaction. It will start bubbling.

Why? Because the  vinegar changes the properties of the baking soda.