Conservation of Mass

What You'll Learn

Conservation of mass means that matter cannot be created or destroyed in a chemical reaction. If you start with 10 grams of reactants, you end with 10 grams of products.

Key Words

evaporation
condensation

Steps

Step 1 — Read

Read and learn: Conservation of mass means that matter cannot be created or destroyed in a chemical reaction. If you start with 10 grams of reactants, you end with 10 grams of products.

Step 2 — Do

Create a labeled diagram of what you built or observed.

Step 3 — Observe

Compare the before and after states.

Step 4 — Record

Write your conclusion: did the results match your hypothesis?

Check Your Understanding

Question 1

1 of 3

What does conservation of mass mean?