Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 938 · 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.🛟 How should the plastic bag be tied around the branch? (a) with sharp wire (b) as tight as possible (c) with a hot glue gun (d) gently, not too tight
2. 2.🫗 How do we separate small stones from dal? (a) sieving (b) winnowing (c) filtering (d) handpicking
3. 3.True or false: husk from rice grain is done by handpicking. (a) True (b) False
4. 4.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) sunny or shady place (b) the kind of salt (c) the same dish (d) the amount of water
5. 5.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) blue (b) bright red (c) dark green (d) pale yellow
6. 6.True or false: vinegar is not needed for the fizzy balloon. (a) False (b) True
7. 7.⚖️ Fair test — do seeds need water to sprout? What do we do with “the number of seeds”? (a) we measure it (b) we change it (c) we keep it the same
8. 8.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a jar with a tight lid (b) cold water to rinse (c) a magnet (d) a bowl
9. 9.🍋 Why can’t you see the lemon writing once it dries? (a) dry juice is see-through (b) the ink is magnetic (c) it turned into air (d) the paper ate it
10. 10.True or false: small pebbles does not dissolve in water. (a) False (b) True
11. 11.🫧 Which of these is neutral? (a) plain water (b) tamarind water (c) baking soda water (d) vinegar
12. 12.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a few hours (b) a potted plant (c) sunlight (d) a mirror
13. 13.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it stays yellow (c) it turns blue (d) it turns black
14. 14.🧺 Which of these is not needed for sprouting seeds? (a) a small bowl (b) cotton wool (c) yeast (d) a few days
15. 15.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) a rainbow (b) dark brown words (c) almost nothing (d) blue words
16. 16.🧺 Do we need a battery cell for the secret lemon message? (a) not needed (b) needed
17. 17.🍞 Which of these is something yeast needs? (a) a magnet (b) sunlight (c) warm water (d) salt
18. 18.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is kept the same? (a) amount of water drops (b) the time we wait (c) sun or shade
19. 19.🛟 The water for the yeast should be ___. (a) very salty (b) ice cold (c) warm, not hot (d) boiling hot
20. 20.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the size of the plant”? (a) we keep it the same (b) we change it (c) we measure it
21. 21.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) a mirror (d) warm water
22. 22.True or false: make seeds is a job of the stem. (a) True (b) False
23. 23.🌱 Which of these is needed for a seed to sprout? (a) soil (b) warmth (c) salt (d) sunlight
24. 24.🧺 Which of these is not needed for the secret lemon message? (a) a cotton bud (b) turmeric powder (c) white paper (d) an adult with an iron
25. 25.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
26. 26.🧺 Which of these is needed for sprouting seeds? (a) a battery cell (b) turmeric powder (c) a small bowl (d) yeast
27. 27.True or false: orange juice is an acid. (a) False (b) True
28. 28.🫧 Which of these is an acid? (a) vinegar (b) detergent water (c) sugar water (d) salt water
29. 29.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is the one thing we change? (a) the amount of sugar (b) the amount of water (c) size of the balloon (d) the water temperature
30. 30.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) baking soda water (d) lemon juice
31. 31.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) rub your eyes (b) skip washing (c) lick your fingers (d) wash your hands
32. 32.🧺 Do we need a battery cell for the fizzy balloon? (a) not needed (b) needed
33. 33.🧺 Which of these is needed for the turmeric test? (a) turmeric powder (b) a balloon (c) a mirror (d) a battery cell
34. 34.🔍 Which is the odd one out? (a) writing the message (b) dipping the cotton bud (c) cutting the lemon (d) reading the message
35. 35.🧈 Why does shaking cream make butter? (a) the jar adds butter (b) fat bits stick together (c) the lid is warm (d) shaking adds salt
36. 36.True or false: turmeric powder is needed for the muddy water filter. (a) False (b) True
37. 37.🧺 Do we need yeast for the muddy water filter? (a) needed (b) not needed
38. 38.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) detergent water (c) sugar water (d) soap solution
39. 39.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
40. 40.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) put it in your mouth (c) keep it away from eyes (d) seal it in a glass jar

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