Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 28 · 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 needed for the secret lemon message? (a) a magnet (b) a balloon (c) an adult with an iron (d) turmeric powder
2. 2.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is kept the same. (a) False (b) True
3. 3.🔍 Which is the odd one out? (a) milk turning to curd (b) baking a cake (c) rusting iron (d) melting ice
4. 4.🧺 Do we need a battery cell for sprouting seeds? (a) not needed (b) needed
5. 5.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) turmeric powder (b) fresh cream (c) a bowl (d) a jar with a tight lid
6. 6.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the filter material (b) the amount poured (c) the same funnel (d) how clear the water is
7. 7.🔍 Which is the odd one out? (a) warmth (b) water (c) air (d) salt
8. 8.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) an adult with an iron (c) yeast (d) a small bowl
9. 9.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) sun or shade (b) the time we wait (c) the same kind of bag (d) the kind of plant
10. 10.True or false: turmeric powder is not needed for sprouting seeds. (a) True (b) False
11. 11.🛟 Why is a plastic jar a good choice for shaking? (a) it is magnetic (b) it is hotter (c) it will not break (d) it is heavier
12. 12.True or false: tamarind water is an acid. (a) True (b) False
13. 13.🔮 Can the brown writing go back to being invisible? (a) yes, if cooled (b) yes, if shaken (c) yes, in the dark (d) no, it stays brown
14. 14.🫧 Is soap solution an acid, a base or neutral? (a) a base (b) an acid (c) neutral
15. 15.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
16. 16.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a funnel or spoon (b) an empty bottle (c) sugar (d) vinegar
17. 17.🫧 Which of these is a base? (a) tamarind water (b) orange juice (c) detergent water (d) vinegar
18. 18.🧺 Do we need a timer for making butter? (a) needed (b) not needed
19. 19.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the amount poured is the one thing we change. (a) True (b) False
20. 20.True or false: a dropper or spoon is needed for the turmeric test. (a) True (b) False
21. 21.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
22. 22.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it grows very little (c) it bursts at once (d) it turns yellow
23. 23.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) bright blue (c) green (d) reddish
24. 24.🫗 Is filtered pond water safe to drink? (a) yes, always (b) yes, if it is cold (c) yes, if it is clear (d) no, germs may stay
25. 25.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) time (d) a magnet
26. 26.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it grows faster (c) the yeast is killed (d) it turns to sugar
27. 27.🔮 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
28. 28.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) a magnet (c) a clean glass (d) cotton or cloth
29. 29.🔍 Which is the odd one out? (a) cooking oil (b) baking soda (c) sugar (d) food colour
30. 30.🧺 Which of these is needed for the secret lemon message? (a) a magnet (b) a battery cell (c) turmeric powder (d) lemon juice
31. 31.🛟 Who should use the hot iron in the secret message experiment? (a) the youngest child (b) any child (c) whoever is fastest (d) only an adult
32. 32.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) crystals grow faster (d) it turns sweet
33. 33.🫧 Is orange juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
34. 34.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a potted plant (b) a clear plastic bag (c) sunlight (d) a battery cell
35. 35.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is the one thing we change. (a) False (b) True
36. 36.True or false: a magnet is not needed for the secret lemon message. (a) False (b) True
37. 37.🪴 Which of these is a job of the leaves? (a) carry water upward (b) hold the plant in soil (c) give out water vapour (d) make seeds
38. 38.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the same kind of bag”? (a) we measure it (b) we keep it the same (c) we change it
39. 39.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we measure it (b) we keep it the same (c) we change it
40. 40.🧺 Which of these is not needed for the muddy water filter? (a) a balloon (b) muddy water (c) a clean glass (d) cotton or cloth

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