Test
Chemical reactions and conservation of mass
This resource helps 9th-grade students identify evidence of chemical reactions and understand conservation of mass. They practice analyzing observations, ordering steps for balancing equations, and completing sentences about reactants and products through targeted questions.
By Edform · Chemistry · Grade 9 · Published Oct 15, 2026 · New
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Questions
- Which observation best indicates that a chemical reaction has occurred?
- Arrange the steps for balancing a chemical equation in the correct order.
- Fill in the blanks: In a chemical reaction, the substances that start the reaction are called _, and the substances formed are called _.
- Which of the following are evidence that a chemical reaction has taken place? Select all that apply.
- Select the correct word for each blank: In the equation H₂ + O₂ → H₂O, H₂ and O₂ are _, and H₂O is the _.
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