Reaction rate

Reaction rate is how quickly two things change into something else when they interact. For example, when you mix baking soda with vinegar, the baking soda and vinegar react and make bubbles of air. The reaction rate is how quickly the baking soda and vinegar turn into bubbles. Some reactions occur quickly and some slowly. Some reactions can be sped up by adding energy (like heat) while some can be slowed down by reducing energy (like putting something in the freezer).