Question 1
Easymultiple_choice
Which observation is the strongest evidence that a chemical reaction has occurred?
Topic: Identifying Chemical Change · Skill: Identify observable evidence of a chemical reaction
Featured Assignment
Chemical Change Foundations
Spot the signs of a real chemical reaction
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Skills
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
Question types
multiple choice
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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
Easymultiple_choice
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
Mediummultiple_choice
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
Mediummultiple_choice
In , the product is:
Topic: Identifying Chemical Change · Skill: Distinguish chemical changes from physical changes
Question 5
Mediummultiple_choice
Which everyday example is a chemical change?
Topic: Identifying Chemical Change · Skill: Explain why everyday processes are chemical changes