Fizz,foam and froth

In room 1 we are learning about chemical changes. I enjoyed making things fizz foam and froth. What I found challenging was writing the explanation.

Have you ever wondered what makes  things fizz,foam and froth? A physical reaction is reversible and a chemical reaction is irreversible. A physical reaction is when you turn water into ice and then turn ice into water again. A chemical reaction is when you change the properties forever.

When you add vinegar to baking soda it explodes and creates a chemical reaction. But why? Because the vinegar changes the properties of the baking soda forever.