Test
Chemical reactions practice
This 7th-grade practice material helps students identify reactants and products, understand signs of chemical reactions, and sequence reaction steps. It emphasizes the conservation of mass through questions and activities regarding chemical processes.
By Edform · Science · Grade 7 · Published Oct 15, 2026 · New
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Questions
- Which of the following best describes a chemical reaction?
- Which of the following are signs that a chemical reaction has occurred? Select all that apply.
- Put the steps of a chemical reaction in the correct order.
- Complete the sentence about conservation of mass:
- Match each term to its correct definition.
- Choose the correct words: In a chemical reaction, the substances you start with are called _, and the substances you end up with are called _.
- If 20 grams of hydrogen reacts with 80 grams of oxygen to form water, what is the total mass of water produced?
- Sort the following changes as physical or chemical.
- Decide if each statement is true or false.
- What is the name for the solid that forms and separates from a solution during a chemical reaction?
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