Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 712 · 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.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) True (b) False
2. 2.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “how dark the writing is”? (a) we measure it (b) we keep it the same (c) we change it
3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the light we look in (b) the liquid we test (c) the colour we see
4. 4.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
5. 5.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it turns blue (c) it disappears (d) it turns yellow again
6. 6.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
7. 7.True or false: a balloon is not needed for sprouting seeds. (a) True (b) False
8. 8.True or false: a cotton bud is not needed for the secret lemon message. (a) False (b) True
9. 9.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) green (c) bright blue (d) it stays white
10. 10.True or false: hold the plant in soil is a job of the flower. (a) False (b) True
11. 11.🫗 Which of these is done by evaporating? (a) salt from sea water (b) mud from water (c) gravel from fine sand (d) bran from wheat flour
12. 12.🍞 Which of these is something yeast needs? (a) salt (b) vinegar (c) a magnet (d) sugar
13. 13.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) baking a cake (c) freezing water (d) rusting iron
14. 14.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a tray for spills (b) baking soda (c) a balloon (d) a mirror
15. 15.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) detergent water (d) lemon juice
16. 16.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the kind of juice (b) the iron setting (c) how dark the writing is
17. 17.🧺 Which of these is not needed for the fizzy balloon? (a) baking soda (b) a battery cell (c) a funnel or spoon (d) a tray for spills
18. 18.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) reddish (c) bright blue (d) green
19. 19.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) a balloon (c) a mirror (d) water
20. 20.🌱 What comes out of a moong seed first when it sprouts? (a) a flower (b) a tiny root (c) a fruit (d) a thorn
21. 21.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) more butter forms (b) it turns to cheese (c) no butter forms (d) it turns blue
22. 22.🫧 Is salt water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
23. 23.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: how clear the water is is what we measure. (a) True (b) False
24. 24.🛟 Why should you never drink water just because it looks clear? (a) germs are invisible (b) clear water is hot (c) clear water is salty (d) clear water is sweet
25. 25.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) lemon juice (c) a small bowl (d) yeast
26. 26.⚖️ Fair test — do seeds need water to sprout? True or false: the number of seeds is the one thing we change. (a) False (b) True
27. 27.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) air from outside (c) smoke (d) carbon dioxide gas
28. 28.True or false: a mirror is needed for sprouting seeds. (a) False (b) True
29. 29.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
30. 30.⚖️ Fair test — do seeds need water to sprout? True or false: the number of seeds is kept the same. (a) False (b) True
31. 31.True or false: sunlight is needed for a seed to sprout. (a) True (b) False
32. 32.True or false: water is not needed for the turmeric test. (a) True (b) False
33. 33.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: how clear the water is is kept the same. (a) False (b) True
34. 34.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) False (b) True
35. 35.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
36. 36.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) an adult with an iron (b) lemon juice (c) a mirror (d) a cotton bud
37. 37.True or false: glucose powder does not dissolve in water. (a) False (b) True
38. 38.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) clearer (b) salty (c) hot (d) muddier
39. 39.🛟 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
40. 40.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) blue words (b) almost nothing (c) dark brown words (d) a rainbow

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