Signs of a chemical reaction

Interpret observations such as gas, colour change, precipitates and energy changes as evidence of chemical change.

⏱ 18 min❓ 8 questions

What you'll be able to do

✔I can identify the observable signs of a chemical reaction
✔I can explain why a single sign is evidence but not proof of a chemical change
✔I can use simple gas tests and precipitate formation to interpret experimental observations

How this works

1Read the short explanations first — they teach you what you need before each question.
2Answer each question, then tap Check. A right answer moves you on automatically; if it's wrong, you'll see a friendly explanation of why.
3Finish all 3 steps to see your score — sign in and subscribe to unlock the full lesson and save it.

What's inside

8 questions and 1 quick teaching card, including:

🔗Match the pairs — Choose the partner that goes with each item.
✅Select all that apply — More than one can be right — pick every option that fits.

👪Grown-up tip: sit alongside younger learners for the first few lessons. Read the questions together and chat about the explanations — that's where the real learning sticks.

Curriculum: AC9S8U07