MS-PS1-2
The standard
Analyze and interpret data on the properties of substances before and after the substances interact to determine if a chemical reaction has occurred.
Next Generation Science Standards
What this standard means
Students need to compare evidence from before and after substances are mixed or heated. They should use property data, like density, melting point, boiling point, solubility, flammability, and odor, to decide whether a new substance formed.
Mastery looks like a student pointing to specific data, not just saying “it changed.” They can explain why a color change alone is weak evidence, but a new odor, changed solubility, or different melting point is stronger. Students often confuse physical changes with chemical reactions, especially dissolving, melting, and mixing.
Ways to teach it
- Have students mix baking soda and vinegar, record odor, gas production, and residue, then compare the results to each starting substance.
- Ask students to write: Which property change gives the strongest evidence of a new substance, and why?
- Give students a before-and-after data table and ask them to circle evidence that supports a chemical reaction.
- Connect to cooking by comparing melted butter with a browned pancake, using property changes to decide which shows a new substance.
Plan a lesson for MS-PS1-2
Generate a complete lesson plan aligned to this standard, with objectives, activities, and materials. Free, no account needed.
Related standards
- HS-PS1-2
Construct and revise an explanation for the outcome of a simple chemical reaction based on the outermost electron states of atoms, trends in the periodic table,...
- 5-PS1-4
Conduct an investigation to determine whether the mixing of two or more substances results in new substances.
- 5-PS1-3
Make observations and measurements to identify materials based on their properties.
- HS-PS1-5
Apply scientific principles and evidence to provide an explanation about the effects of changing the temperature or concentration of the reacting particles on t...