Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 280 · 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.🛟 How should the plastic bag be tied around the branch? (a) as tight as possible (b) with sharp wire (c) with a hot glue gun (d) gently, not too tight
2. 2.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is what we measure. (a) True (b) False
3. 3.🧺 Which of these is not needed for the turmeric test? (a) a balloon (b) water (c) soap solution (d) white paper strips
4. 4.🧺 Do we need cotton wool for sprouting seeds? (a) not needed (b) needed
5. 5.🧺 Which of these is not needed for the fizzy balloon? (a) a funnel or spoon (b) a comb (c) baking soda (d) vinegar
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) yeast (d) a shallow dish
7. 7.🫗 How do we separate bran from wheat flour? (a) winnowing (b) handpicking (c) sieving (d) evaporating
8. 8.🧺 Do we need an adult with an iron for the secret lemon message? (a) not needed (b) needed
9. 9.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the iron setting”? (a) we measure it (b) we keep it the same (c) we change it
10. 10.🍋 Which of these steps is a job for an adult? (a) dipping the cotton bud (b) writing the message (c) plugging in the iron (d) reading the message
11. 11.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it shrinks (b) it turns blue (c) there is no change (d) it grows bigger
12. 12.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) put it in your mouth (c) keep it away from eyes (d) seal it in a glass jar
13. 13.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) use only kitchen items (c) mix bathroom cleaners (d) sip each liquid
14. 14.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is the one thing we change. (a) True (b) False
15. 15.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
16. 16.🪴 Which part of a plant does this job: give out water vapour? (a) stem (b) leaves (c) flower (d) roots
17. 17.🫧 Which of these is an acid? (a) vinegar (b) detergent water (c) plain water (d) soap solution
18. 18.⚖️ Fair test — do seeds need water to sprout? What do we do with “the number of seeds”? (a) we change it (b) we keep it the same (c) we measure it
19. 19.🪴 Where did the water inside the bag come from? (a) the rain (b) the rubber band (c) the plastic (d) the leaves
20. 20.🧺 Which of these is needed for the secret lemon message? (a) a small bowl (b) a magnet (c) turmeric powder (d) a battery cell
21. 21.True or false: letting the paper dry is a job a child can do. (a) False (b) True
22. 22.True or false: folding paper is a change that cannot be undone. (a) True (b) False
23. 23.🫧 Which of these is neutral? (a) sugar water (b) orange juice (c) tamarind water (d) lemon juice
24. 24.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is kept the same. (a) False (b) True
25. 25.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is what we measure. (a) True (b) False
26. 26.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is the one thing we change? (a) the amount of water (b) size of the balloon (c) the water temperature (d) the amount of sugar
27. 27.🧈 Why does shaking cream make butter? (a) fat bits stick together (b) the lid is warm (c) shaking adds salt (d) the jar adds butter
28. 28.True or false: seeds on dry cotton sprouts in a few days. (a) False (b) True
29. 29.🧺 Which of these is needed for the fizzy balloon? (a) a magnet (b) a mirror (c) a funnel or spoon (d) sugar
30. 30.🧺 Which of these is needed for the secret lemon message? (a) yeast (b) a magnet (c) lemon juice (d) a balloon
31. 31.🍋 Why can’t you see the lemon writing once it dries? (a) the ink is magnetic (b) it turned into air (c) dry juice is see-through (d) the paper ate it
32. 32.🧂 Which of these does not dissolve in water? (a) baking soda (b) sand (c) food colour (d) glucose powder
33. 33.🧺 Do we need yeast for making butter? (a) needed (b) not needed
34. 34.True or false: detergent water is a base. (a) False (b) True
35. 35.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
36. 36.🧺 Do we need turmeric powder for the leafy bag test? (a) not needed (b) needed
37. 37.🧺 Do we need a small bowl for the secret lemon message? (a) needed (b) not needed
38. 38.True or false: a paper clip is not needed for the yeast balloon. (a) True (b) False
39. 39.True or false: a funnel is needed for the muddy water filter. (a) False (b) True
40. 40.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed

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