Infant Incubator Lesson 6
How can we investigate if the same atoms at the beginning of the reaction are there at the end?
Estimated class Time:
Two 40-minute class periods
Question:
How can we investigate if the same atoms at the beginning of the reaction are there at the end?
Materials:
- Baking soda, vinegar (limit to 5g baking soda and 10 ml of vinegar per group)
- Metric Balance
- Containers for students to use to conduct the experiment (clear containers with lids, balloons, etc. - balloons will not work as well as containers with lids)
Lesson Level Learning Objectives:
-
MS-PS 1-5: Engage in argument from evidence to explain that matter is conserved and that the mass does not change in a chemical reaction.
Phenomenon:
- Students will plan an investigation using baking soda and vinegar to determine the mass of the substances before and after the reaction.
- Students observe tools and materials that could be used to investigate the total mass before and after the reaction.
What we Figured Out:
- Law of Conservation of Mass states that matter cannot be created or destroyed during a chemical reaction.
- In baking soda and vinegar there was the same amount of matter before and after the reaction.
- Solids, liquids and gases are types of matter, therefore, they all have mass.
- We learned that the bubbles have gas in them and has mass, therefore, nothing disappears and there is the same amount of matter before and after the reaction.
Questions we still have:
- Revisit the DQB to answer questions and determine if there are any unanswered questions. (Students could be given a print out of all of their questions and be asked to answer them.)