Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 16 · 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.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
2. 2.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
3. 3.🛟 Why is a plastic jar a good choice for shaking? (a) it is magnetic (b) it is heavier (c) it will not break (d) it is hotter
4. 4.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same muddy water”? (a) we keep it the same (b) we change it (c) we measure it
5. 5.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the filter material”? (a) we measure it (b) we change it (c) we keep it the same
6. 6.🌱 Will these sprout: wet seeds by a window? (a) does not sprout (b) sprouts
7. 7.True or false: yeast is needed for making butter. (a) False (b) True
8. 8.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) green (c) reddish (d) white at once
9. 9.🫧 Which of these is an acid? (a) baking soda water (b) tamarind water (c) soap solution (d) plain water
10. 10.🫧 Is detergent water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
11. 11.🔍 Which is the odd one out? (a) dipping the cotton bud (b) writing the message (c) letting the paper dry (d) ironing the paper
12. 12.🫗 Why does filtered muddy water look clearer? (a) the filter traps mud (b) the filter adds soap (c) the water evaporates (d) the mud dissolves
13. 13.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “how hard we shake”? (a) we keep it the same (b) we change it (c) we measure it
14. 14.🔮 Predict: you stop shaking after only one minute. What do you have? (a) ghee (b) butter lumps (c) still runny cream (d) cheese
15. 15.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the ironing time (b) the kind of juice (c) how dark the writing is
16. 16.True or false: a mirror is not needed for the yeast balloon. (a) False (b) True
17. 17.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
18. 18.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the mud (b) the salt (c) nothing (d) the water
19. 19.True or false: seeds on wet cotton does not sprout. (a) True (b) False
20. 20.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) detergent water (c) tamarind water (d) lemon juice
21. 21.🔮 Predict: the adult irons for only one second. What happens? (a) the paper floats (b) it gets darker (c) writing stays faint (d) writing turns green
22. 22.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) wash your hands (b) lick your fingers (c) skip washing (d) rub your eyes
23. 23.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a funnel (b) yeast (c) muddy water (d) cotton or cloth
24. 24.🍋 Secret message: who does this step — cutting the lemon? (a) an adult does it (b) a child can do it
25. 25.🧺 Do we need turmeric powder for the secret lemon message? (a) needed (b) not needed
26. 26.🧺 Which of these is needed for the fizzy balloon? (a) an empty bottle (b) a comb (c) a seed (d) sugar
27. 27.True or false: chalk powder does not dissolve in water. (a) False (b) True
28. 28.True or false: a rubber band is not needed for the leafy bag test. (a) False (b) True
29. 29.🍋 Which of these steps is a job for an adult? (a) ironing the paper (b) dipping the cotton bud (c) letting the paper dry (d) writing the message
30. 30.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting butter (c) baking a cake (d) melting ice
31. 31.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) yes, they sprout (b) they turn to stones (c) they melt (d) no, never
32. 32.🌱 Which of these does not sprout? (a) seeds on dry cotton (b) wet seeds by a window (c) seeds on wet cotton (d) wet seeds in the dark
33. 33.🎈 Why does the balloon blow up? (a) vinegar is hot (b) the bottle shrinks (c) outside air gets in (d) gas is made inside
34. 34.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) detergent water (d) plain water
35. 35.True or false: bad grains from rice is done by handpicking. (a) False (b) True
36. 36.True or false: a cotton bud is not needed for the secret lemon message. (a) True (b) False
37. 37.🧺 Which of these is needed for the fizzy balloon? (a) a mirror (b) a seed (c) sugar (d) a balloon
38. 38.True or false: a few days is not needed for sprouting seeds. (a) False (b) True
39. 39.🫧 Which of these is neutral? (a) lemon juice (b) salt water (c) orange juice (d) tamarind water
40. 40.🧺 Do we need turmeric powder for the muddy water filter? (a) needed (b) not needed

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