CAST Prep Grade 7 MS-PS1-2

What comes to mind when you hear the term chemical reaction?

Based on the patterns (similarities and differences) in the properties of the reactants and products in the table above, is this a physical or chemical reaction? Cite specific evidence from multiple properties in the data table to support your answer.

Based on the patterns (similarities and differences) in the properties of the reactants and products in the table above, is this a physical or chemical reaction? Cite specific evidence from multiple properties in the table to support your answer.

After examining all three properties of all of the substances in Demonstrations 1 and 2:

a. What patterns (similarities and differences) do you observe in the reactants and products of substances in physical reactions?

b. What patterns (similarities and differences) do you observe in the reactants and products of substances in chemical reactions?

Using the data from Demonstrations 1 and 2, describe the difference between a physical and chemical reaction in terms of the rearrangement of atoms and molecules.