Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 488 · 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.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) green (c) white at once (d) bright blue
2. 2.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) sunlight (c) a rubber band (d) a mirror
3. 3.🔍 Which is the odd one out? (a) salt (b) a magnet (c) vinegar (d) warm water
4. 4.🫧 Which of these is neutral? (a) plain water (b) tamarind water (c) vinegar (d) detergent water
5. 5.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) sugar crystals form (c) it turns to oil (d) it turns to butter
6. 6.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the same bottle”? (a) we keep it the same (b) we change it (c) we measure it
7. 7.🧺 Do we need a cotton bud for the secret lemon message? (a) needed (b) not needed
8. 8.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it floats on top (b) it sinks to the bottom (c) it dissolves (d) it turns to sand
9. 9.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
10. 10.True or false: detergent water turns turmeric reddish-brown. (a) True (b) False
11. 11.🧺 Do we need a funnel for the muddy water filter? (a) not needed (b) needed
12. 12.True or false: tea leaves from tea is done by winnowing. (a) False (b) True
13. 13.🧺 Do we need turmeric powder for sprouting seeds? (a) needed (b) not needed
14. 14.🧺 Which of these is needed for the secret lemon message? (a) a balloon (b) a cotton bud (c) a magnet (d) turmeric powder
15. 15.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) how dark the writing is (b) the kind of juice (c) the iron setting
16. 16.True or false: small stones from dal is done by handpicking. (a) False (b) True
17. 17.🔍 Which is the odd one out? (a) air (b) soil (c) sugar (d) sunlight
18. 18.🪴 Where did the water inside the bag come from? (a) the plastic (b) the rubber band (c) the rain (d) the leaves
19. 19.True or false: a balloon is not needed for the fizzy balloon. (a) True (b) False
20. 20.⚖️ Fair test — do seeds need water to sprout? What do we do with “wet or dry cotton”? (a) we measure it (b) we change it (c) we keep it the same
21. 21.🧺 Do we need a magnet for the turmeric test? (a) not needed (b) needed
22. 22.🛟 Why must a plastic bag never go over anyone’s head? (a) it is too big (b) it changes colour (c) it can block breathing (d) it gets wet
23. 23.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) a magnet (c) white paper strips (d) a comb
24. 24.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) size of the balloon (b) spoons of baking soda (c) the same bottle (d) the amount of vinegar
25. 25.True or false: a balloon is not needed for the yeast balloon. (a) True (b) False
26. 26.⚖️ 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
27. 27.True or false: mud from water is done by sieving. (a) False (b) True
28. 28.🧺 Do we need vinegar for the fizzy balloon? (a) not needed (b) needed
29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the turmeric paper (c) the liquid we test
30. 30.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it turns blue (b) it flowers more (c) it wilts and droops (d) it grows faster
31. 31.🔍 Which is the odd one out? (a) melting butter (b) dissolving salt (c) baking a cake (d) freezing water
32. 32.🍞 Which of these is something yeast needs? (a) a magnet (b) salt (c) sugar (d) sunlight
33. 33.🧺 Do we need a funnel or spoon for the fizzy balloon? (a) needed (b) not needed
34. 34.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is kept the same. (a) False (b) True
35. 35.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is the one thing we change. (a) False (b) True
36. 36.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) sugar water (c) detergent water (d) baking soda water
37. 37.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
38. 38.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it turns blue (c) reddish-brown (d) it stays yellow
39. 39.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the liquid we test (b) the turmeric paper (c) the number of drops (d) the colour we see

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