Free lesson: Conservation of Mass Lab (Grade 10 Science)

This is a complete lesson from SNC2D Unit 3, Chemical Reactions, free to download and use. It's exactly what you get in the paid units, so you can see the quality before you buy.

Students predict, then measure, the mass before and after baking soda reacts with vinegar, first in an open cup and then in a sealed zip-top bag. They calculate the change and percent change, explain the differences (escaping gas, leaks, the buoyancy of the inflated bag and balance precision) and connect the law of conservation of mass to atomic theory, with worked answers. All you need is a balance, zip-top bags, small cups, baking soda and vinegar, and the plan includes safety notes for every step.

What you get

• A teacher lesson plan built on the Grade 10 Science, Academic curriculum (SNC2D), with expectations, learning goals, success criteria, a timed sequence, differentiation, safety notes and a worked answer key
• A slide deck with speaker notes on every slide
• The lab handout with a data table and analysis questions
• Editable Word and PowerPoint files, plus PDFs