What is a chemical reaction?

Which of these is a sign a chemical reaction might be happening?

What do we call the things we start with in a chemical reaction?

What are the new things made in a chemical reaction called?

Which of these is NOT usually a sign of a chemical reaction?

Mixing vinegar and baking soda creates bubbles. What kind of gas is this?

What is burning wood an example of?

When iron rusts, is it a chemical reaction?

Which of these is needed for a fire (combustion) to happen?

Is cooking an egg a chemical reaction?