*8.6E

Investigate how mass is conserved in chemical reactions and relate conservation of mass to the rearrangement of atoms using chemical equations, including photosynthesis.

👈As you can see, during a chemical reaction the number (and mass) of atoms does not change, but the atoms do rearrange to form new substances (products).

Determine a mnemonic to help you remember the evidence of a chemical reaction.

Check Your Understanding

1. What evidences indicate that a new substance has formed as a result of a chemical reaction?

2. After a reaction, how do the reactants and products in a chemical equation compare?

Practice answering the following STAAR questions

Answers: H, C, G, B, J, G, D

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