Question 1
EasyQuestion
Which observation is the strongest evidence that a chemical reaction has occurred?
Topic: Identifying Chemical Change · Skill: Identify observable evidence of a chemical reaction
Focus · Grades 9-12
Assignment Practice
Chemical Change Foundations
Spot the signs of a real chemical reaction
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Section A: Signs of Chemical Change · 6 questionsSection B: Reactants, Products and Vocabulary · 6 questions
Section A: Signs of Chemical Change
Recognise observations that show a chemical reaction may have happened.
Choose the best answer based on observable evidence.
Question 2
EasyQuestion
Which of the following is usually a sign of chemical change?
Topic: Identifying Chemical Change · Skill: Identify observable evidence of a chemical reaction
Question 3
MediumQuestion
In a chemical reaction, substances present before the reaction are called:
Topic: Identifying Chemical Change · Skill: Infer reactants and products from a reaction description
Question 4
MediumQuestion
In , the product is:
Topic: Identifying Chemical Change · Skill: Distinguish chemical changes from physical changes
Question 5
MediumQuestion
Which everyday example is a chemical change?
Topic: Identifying Chemical Change · Skill: Explain why everyday processes are chemical changes
What this assignment covers
Start Chapter 1 by learning how to spot chemical reactions, identify evidence of new substances, and separate physical changes from chemical changes.
Skills and sections
Identify observable evidence of a chemical reaction, Infer reactants and products from a reaction description, Distinguish chemical changes from physical changes, Explain why everyday processes are chemical changes, Read chemical equations as statements of reactions
- Section A: Signs of Chemical Change: 6 questions
- Section B: Reactants, Products and Vocabulary: 6 questions