Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 722 · 40 questions

What you do (Find the experiment, use the idea): 1. Read the question and find its experiment. 2. Use that experiment’s idea — acid and base, indicator colours, chemical change, what seeds and yeast need, transpiration, crystals or filtering. 3. For a fair-test question, find what is changed, kept the same and measured. 4. For a safety question, choose what keeps everyone safe.

1. 1.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
2. 2.🫗 Is filtered pond water safe to drink? (a) yes, always (b) yes, if it is clear (c) yes, if it is cold (d) no, germs may stay
3. 3.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
4. 4.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is the one thing we change. (a) True (b) False
5. 5.True or false: dipping the cotton bud is a job a child can do. (a) True (b) False
6. 6.🌱 Is soil needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
7. 7.True or false: curd is an acid. (a) True (b) False
8. 8.🧺 Do we need an empty bottle for the fizzy balloon? (a) needed (b) not needed
9. 9.🔍 Which is the odd one out? (a) putting the iron away (b) ironing the paper (c) writing the message (d) cutting the lemon
10. 10.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) soap solution (c) water (d) a balloon
11. 11.🛟 How should the plastic bag be tied around the branch? (a) with sharp wire (b) with a hot glue gun (c) as tight as possible (d) gently, not too tight
12. 12.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the amount of cream”? (a) we change it (b) we measure it (c) we keep it the same
13. 13.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) an adult with an iron (b) a cotton bud (c) white paper (d) turmeric powder
14. 14.🛟 What should you do if vinegar splashes in your eye? (a) ignore it (b) rub it hard (c) rinse with clean water (d) add baking soda
15. 15.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
16. 16.🧈 Why does shaking cream make butter? (a) the jar adds butter (b) the lid is warm (c) shaking adds salt (d) fat bits stick together
17. 17.🍋 Secret message: who does this step — cutting the lemon? (a) a child can do it (b) an adult does it
18. 18.🍋 What colour does the lemon writing turn when an adult warms it? (a) blue (b) green (c) brown (d) white
19. 19.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a comb (c) soap solution (d) a dropper or spoon
20. 20.True or false: a timer is not needed for making butter. (a) True (b) False
21. 21.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) a balloon (d) a magnet
22. 22.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a mirror (b) cotton wool (c) a few days (d) a small bowl
23. 23.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
24. 24.🍋 Secret message: who does this step — reading the message? (a) a child can do it (b) an adult does it
25. 25.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) cotton or cloth (b) muddy water (c) a battery cell (d) sand and pebbles
26. 26.📘 Is the fizzing a sign that a new substance is made? (a) it is only dissolving (b) no, nothing changes (c) yes, a new gas forms (d) it is only melting
27. 27.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) in a busy doorway (d) safe from small children
28. 28.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
29. 29.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the iron setting is kept the same. (a) False (b) True
30. 30.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a bowl (b) a jar with a tight lid (c) fresh cream (d) a balloon
31. 31.True or false: yeast is needed for sprouting seeds. (a) False (b) True
32. 32.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same funnel is kept the same. (a) False (b) True
33. 33.🫧 Is vinegar an acid, a base or neutral? (a) a base (b) an acid (c) neutral
34. 34.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a small bowl (b) cotton wool (c) a battery cell (d) moong seeds
35. 35.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) a rainbow (b) blue words (c) almost nothing (d) dark brown words
36. 36.🧺 Which of these is needed for making butter? (a) a battery cell (b) a jar with a tight lid (c) a magnet (d) a balloon
37. 37.🍞 Why do we add sugar to the yeast? (a) to make it heavy (b) it is food for yeast (c) to make it sweet (d) to colour it
38. 38.True or false: a magnet is not needed for the fizzy balloon. (a) False (b) True
39. 39.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) hot (b) clearer (c) muddier (d) salty
40. 40.True or false: melting ice is a change that cannot be undone. (a) True (b) False

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