Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 478 · 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.🫧 Which of these is a base? (a) lemon juice (b) vinegar (c) tamarind water (d) detergent water
2. 2.True or false: a battery cell is needed for sprouting seeds. (a) True (b) False
3. 3.🧺 Do we need an empty bottle for the fizzy balloon? (a) not needed (b) needed
4. 4.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it stays yellow (c) it turns red (d) it turns black
5. 5.🫗 How do we separate bad grains from rice? (a) winnowing (b) handpicking (c) evaporating (d) sieving
6. 6.True or false: give out water vapour is a job of the leaves. (a) True (b) False
7. 7.True or false: a mirror is needed for the fizzy balloon. (a) False (b) True
8. 8.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns blue (b) it disappears (c) it turns darker red (d) it turns yellow again
9. 9.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) size of the balloon (b) the same bottle (c) spoons of baking soda
10. 10.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: how hard we shake is what we measure. (a) False (b) True
11. 11.🪴 Which of these is a job of the leaves? (a) hold up the leaves (b) carry water upward (c) give out water vapour (d) take in water from soil
12. 12.True or false: cold water to rinse is needed for making butter. (a) True (b) False
13. 13.🍋 Secret message: who does this step — ironing the paper? (a) an adult does it (b) a child can do it
14. 14.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) warm water (c) a shallow dish (d) a mirror
15. 15.True or false: a magnet is not needed for the secret lemon message. (a) True (b) False
16. 16.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny cubes (c) tiny spheres (d) tiny stars
17. 17.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we keep it the same (b) we change it (c) we measure it
18. 18.🍋 Secret message: who does this step — letting the paper dry? (a) a child can do it (b) an adult does it
19. 19.🪴 Which of these is a job of the leaves? (a) make food in sunlight (b) hold up the leaves (c) take in water from soil (d) carry water upward
20. 20.🛟 Who should use the hot iron in the secret message experiment? (a) any child (b) only an adult (c) whoever is fastest (d) the youngest child
21. 21.True or false: seeds in the freezer sprouts in a few days. (a) True (b) False
22. 22.🧺 Which of these is needed for the turmeric test? (a) water (b) yeast (c) a magnet (d) a comb
23. 23.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
24. 24.🛟 What should you do if vinegar splashes in your eye? (a) rub it hard (b) add baking soda (c) ignore it (d) rinse with clean water
25. 25.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “amount of water drops”? (a) we keep it the same (b) we change it (c) we measure it
26. 26.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
27. 27.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they sprout faster (b) they grow fruit (c) they glow (d) they do not sprout
28. 28.🛟 Which safety rule fits the fizzy balloon experiment? (a) put it in your mouth (b) seal it in a glass jar (c) keep it away from eyes (d) shake it near your face
29. 29.🌱 Which of these does not sprout? (a) seeds on wet cotton (b) wet seeds in the dark (c) wet seeds by a window (d) seeds in the freezer
30. 30.True or false: muddy water is needed for the muddy water filter. (a) True (b) False
31. 31.🧂 Which of these does not dissolve in water? (a) sand (b) baking soda (c) glucose powder (d) table salt
32. 32.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same cotton bud”? (a) we keep it the same (b) we change it (c) we measure it
33. 33.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns black (b) it stays yellow (c) it turns red (d) it turns blue
34. 34.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
35. 35.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
36. 36.⚖️ Fair test — do seeds need water to sprout? What do we do with “wet or dry cotton”? (a) we change it (b) we measure it (c) we keep it the same
37. 37.🛟 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
38. 38.🧺 Do we need yeast for making butter? (a) needed (b) not needed
39. 39.True or false: a jar with a tight lid is not needed for making butter. (a) False (b) True
40. 40.🧺 Do we need cotton or cloth for the muddy water filter? (a) not needed (b) needed

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