MS-PS1-5 - Performance Expectation
Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved.
Middle School · Next Generation Science Standards · NGSS Lead States 2013
Standard Unwrapping
AI-generated as a starting point — sign in to edit.Vocabulary
modeltotal number of atomschemical reactionmassconservation
Skills
- develop a model (showing conservation of atoms in a chemical reaction) #dok3
- use a model (to describe conservation of atoms and mass) #dok2
- explain (how the total number of atoms does not change in a chemical reaction) #dok2
- predict (effects of chemical reactions on the number of atoms and mass) #dok3
Learning Targets
- I can identify the parts of a model representing atoms in a chemical reaction. #dok1
- I can recall that the total number of atoms does not change during a chemical reaction. #dok1
- I can describe how mass is conserved in a chemical reaction using evidence from a model. #dok2
- I can use a model to explain the relationship between atoms and mass in chemical reactions. #dok2
- I can develop a model to show how atoms rearrange but are not lost or gained in a chemical reaction. #dok3
- I can predict and justify how the mass of reactants and products compare in a given chemical reaction. #dok3
Big Ideas
- Atoms are rearranged during chemical reactions, but the total number of atoms remains constant.
- The conservation of mass in chemical reactions is explained by the conservation of atoms.
Essential Questions
- How does a model help us visualize the conservation of atoms during a chemical reaction?
- Why doesn’t the mass change before and after a chemical reaction?
- What evidence supports the idea that atoms are not created or destroyed during chemical reactions?
- How can we use models to predict the outcomes of chemical reactions?
- What does the conservation of mass tell us about the products and reactants in a chemical reaction?