Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 403 · 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.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a potted plant (b) a mirror (c) a few hours (d) a clear plastic bag
2. 2.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is kept the same. (a) False (b) True
3. 3.🫧 Is tamarind water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
4. 4.🛟 What should you do after handling muddy water? (a) lick your fingers (b) wash hands afterwards (c) wipe hands on face (d) nothing is needed
5. 5.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
6. 6.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sniff each bottle hard (c) mix bathroom cleaners (d) sip each liquid
7. 7.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same glass”? (a) we keep it the same (b) we measure it (c) we change it
8. 8.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) bright red (b) pale yellow (c) dark green (d) blue
9. 9.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) the cream temperature (b) the same jar (c) time to make butter (d) the amount of cream
10. 10.True or false: sugar is something yeast does not need. (a) True (b) False
11. 11.True or false: mud from water is done by handpicking. (a) True (b) False
12. 12.True or false: turmeric powder is not needed for the secret lemon message. (a) False (b) True
13. 13.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we measure it (b) we change it (c) we keep it the same
14. 14.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
15. 15.🍋 Which of these steps is a job for an adult? (a) dipping the cotton bud (b) plugging in the iron (c) reading the message (d) letting the paper dry
16. 16.True or false: sugar is needed for a seed to sprout. (a) False (b) True
17. 17.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the kind of balloon (b) size of the balloon (c) spoons of baking soda (d) the amount of vinegar
18. 18.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) sugar water (c) vinegar (d) detergent water
19. 19.True or false: hold the plant in soil is a job of the roots. (a) True (b) False
20. 20.🧺 Which of these is not needed for the fizzy balloon? (a) a balloon (b) a tray for spills (c) vinegar (d) a comb
21. 21.🧺 Do we need a balloon for the fizzy balloon? (a) not needed (b) needed
22. 22.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) the kind of seeds (b) wet or dry cotton (c) the same place (d) the number of seeds
23. 23.📘 What is yeast? (a) a kind of sugar (b) a kind of salt (c) a tiny living fungus (d) a kind of stone
24. 24.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
25. 25.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
26. 26.🔍 Which is the odd one out? (a) a magnet (b) warm water (c) sugar (d) time
27. 27.🍞 Which of these is something yeast needs? (a) sunlight (b) sugar (c) vinegar (d) salt
28. 28.🛟 Which safety rule fits the fizzy balloon experiment? (a) keep it away from eyes (b) put it in your mouth (c) shake it near your face (d) seal it in a glass jar
29. 29.🌱 Which of these is not needed for a seed to sprout? (a) warmth (b) air (c) sunlight (d) water
30. 30.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) a comb (c) yeast (d) turmeric powder
31. 31.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
32. 32.🫗 How do we separate tea leaves from tea? (a) winnowing (b) filtering (c) sieving (d) handpicking
33. 33.🧺 Do we need white paper for the secret lemon message? (a) needed (b) not needed
34. 34.📘 Is the fizzing a sign that a new substance is made? (a) it is only melting (b) yes, a new gas forms (c) no, nothing changes (d) it is only dissolving
35. 35.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) reddish (c) bright blue (d) white at once
36. 36.🧺 Do we need yeast for the secret lemon message? (a) needed (b) not needed
37. 37.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) reddish-brown (c) bright blue (d) it stays white
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) a balloon (d) a spoon
39. 39.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) an old shirt or apron (c) a white party dress (d) your school uniform
40. 40.🔮 Predict: you use plain water instead of vinegar. What happens? (a) the balloon bursts (b) it turns to honey (c) a huge eruption (d) very little fizzing

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