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Reaction Evidence and Particle Models Worksheet

📝 Worksheet hard ⏱️ 20 minutes 8 problems
Reaction Evidence and Particle Models Worksheet
Grade 8 Science LearnCrux.com
Name:
Date:
Directions
  • Fill in each blank carefully.
  • Circle or mark the best answer for each multiple-choice question.
  • Match each prompt to the best option before writing your answer.
  • Use the larger space to show your thinking on word problems.
1. Evidence that a new substance formed can support the claim that a chemical __ occurred.
2. Which clue most strongly suggests a chemical reaction?
3. Match the term to the best explanation: particle model
Match with:
Answer:
4. Atoms do not disappear in reactions; they are __.
5. Why is a physical change different from a chemical reaction?
6. Which statement is most accurate?
7. A chart that organizes elements is the periodic __.
8. Why should students compare substances before and after an interaction?
📋 Teacher Answer Key
1. reaction
2. new gas and a new solid form
3. a way to represent how matter is built and rearranged
4. rearranged
5. A physical change does not form new substances, while a chemical reaction does
6. Models help explain why evidence of a reaction appears.
7. table
8. That comparison helps them decide whether new substances formed and whether a chemical reaction likely occurred

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