Conservation of Mass Worksheet (KS3, Middle school)

This is a great worksheet to reinforce the principle of conservation of mass. It works well in KS3/ middle school when teaching the concept for the first time or as a great reminder in high school/GCSEs as revision. It can easily be used after a lab or demo to show the principle in action.

The activity follows the precipitation reaction between copper (II) sulfate and sodium hydroxide and is split into 2 parts:

Part 1:
This looks at the experimental method used, asking questions about how the experiment shows conservation of mass.

Part 2:
This is more about the chemical equation, using a particle diagram and a table to help students understand the reaction more at a chemical level.

I’ve tried to upload a preview image which helps you understand the worksheet a bit better and check if its suitable for your students. In the downloadable folder, there is an answer sheet for all 10 questions and the table as well.