![Test tubes with colourful liquids](/sites/default/files/styles/resource_card_image_360x300_/public/2021-11/test-tube-with-colourful_liquids.jpg?itok=MEo5D0U_)
Evidence of Chemical Change
Backgrounders
Learn how to tell if a chemical reaction has taken place.
![What speeds up a chemical reaction?](/sites/default/files/2019-08/what-speeds-up-a-chemical-reaction.jpg)
What speeds up a chemical reaction?
Hands-on Activities
Learn about the role of yeast in this fun decomposition reaction.
![What is an exothermic reaction?](/sites/default/files/2019-08/what-is-an-exothermic-reaction.jpg)
What is an exothermic reaction?
Hands-on Activities
Things are heating up! Explore the temperature change that occurs in an exothermic reaction and the role of catalysts is this chemistry activity.