Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 951 · 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 an acid? (a) lemon juice (b) salt water (c) soap solution (d) detergent water
2. 2.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
3. 3.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) soap solution (c) a dropper or spoon (d) white paper strips
4. 4.True or false: bran from wheat flour is done by handpicking. (a) False (b) True
5. 5.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) tea stays behind (b) both stay behind (c) leaves pass through (d) leaves stay behind
6. 6.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a balloon (b) turmeric powder (c) soap solution (d) water
7. 7.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) the youngest child (c) a friend who is running (d) nobody needs to
8. 8.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it grows faster (c) it turns to sugar (d) the yeast is killed
9. 9.🧺 Do we need white paper for the secret lemon message? (a) needed (b) not needed
10. 10.🍋 What colour does the lemon writing turn when an adult warms it? (a) blue (b) white (c) green (d) brown
11. 11.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold kills sugar (c) cold slows yeast down (d) cold makes it pink
12. 12.🌱 Will these sprout: seeds on dry cotton? (a) sprouts (b) does not sprout
13. 13.🫧 Is plain water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
14. 14.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) pour it down the sink (c) put it in your mouth (d) throw it at a wall
15. 15.True or false: a battery cell is needed for growing salt crystals. (a) False (b) True
16. 16.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it shrinks (b) there is no change (c) it grows bigger (d) it turns blue
17. 17.True or false: a mirror is not needed for making butter. (a) False (b) True
18. 18.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a bowl (b) fresh cream (c) yeast (d) a jar with a tight lid
19. 19.🧈 Why does shaking cream make butter? (a) the jar adds butter (b) the lid is warm (c) shaking adds salt (d) fat bits stick together
20. 20.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) safe from small children (c) in a busy doorway (d) on the edge of a table
21. 21.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same cotton bud”? (a) we measure it (b) we change it (c) we keep it the same
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a balloon (c) salt (d) warm water
23. 23.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to make bread rise (c) to clean floors (d) to wash dishes
24. 24.🔮 Predict: you stop shaking after only one minute. What do you have? (a) butter lumps (b) ghee (c) still runny cream (d) cheese
25. 25.⚖️ 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) the amount of water (b) sunny or shady place (c) the amount of salt (d) days to see crystals
26. 26.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a rubber band (b) a potted plant (c) a few hours (d) a magnet
27. 27.True or false: a balloon is needed for making butter. (a) True (b) False
28. 28.🫧 Is tamarind water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
29. 29.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they freeze (b) they float apart (c) they become magnets (d) they react
30. 30.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “how clear the water is”? (a) we keep it the same (b) we change it (c) we measure it
31. 31.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) dark green (b) bright red (c) pale yellow (d) blue
32. 32.True or false: a magnet is not needed for the muddy water filter. (a) False (b) True
33. 33.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it grows faster (b) it wilts and droops (c) it flowers more (d) it turns blue
34. 34.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) warm water (c) sugar (d) a small bottle
35. 35.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a bowl (b) fresh cream (c) cold water to rinse (d) a magnet
36. 36.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) a white party dress (c) your best clothes (d) an old shirt or apron
37. 37.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
38. 38.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the same bottle”? (a) we change it (b) we measure it (c) we keep it the same
39. 39.🫗 Which of these is done by filtering? (a) tea leaves from tea (b) bad grains from rice (c) salt from sea water (d) bran from wheat flour
40. 40.True or false: a few days is needed for sprouting seeds. (a) False (b) True

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