Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 49 · 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 do we separate small stones from dal? (a) evaporating (b) sieving (c) filtering (d) handpicking
2. 2.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) blue words (b) a rainbow (c) dark brown words (d) almost nothing
3. 3.⚖️ Fair test — do seeds need water to sprout? True or false: the same bowls is what we measure. (a) False (b) True
4. 4.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) rusting iron (c) folding paper (d) cooking an egg
5. 5.True or false: a mirror is needed for making butter. (a) True (b) False
6. 6.True or false: sugar is needed for the fizzy balloon. (a) True (b) False
7. 7.🫧 Which of these is neutral? (a) orange juice (b) lemon juice (c) tamarind water (d) plain water
8. 8.🌱 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
9. 9.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a potted plant (b) a few hours (c) turmeric powder (d) a rubber band
10. 10.🔍 Which is the odd one out? (a) dissolving salt (b) cooking an egg (c) melting butter (d) folding paper
11. 11.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) a mirror (c) a potted plant (d) sunlight
12. 12.🍋 Secret message: who does this step — plugging in the iron? (a) a child can do it (b) an adult does it
13. 13.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a bowl (b) a jar with a tight lid (c) fresh cream (d) a magnet
14. 14.🛟 Why must the jar lid be screwed on tightly? (a) so it turns yellow (b) so cream does not spill (c) so it gets hot (d) so air gets out
15. 15.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
16. 16.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we change it (b) we measure it (c) we keep it the same
17. 17.🫧 Which of these is an acid? (a) plain water (b) salt water (c) vinegar (d) baking soda water
18. 18.🧺 Which of these is not needed for sprouting seeds? (a) water (b) a battery cell (c) a small bowl (d) cotton wool
19. 19.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is the one thing we change. (a) True (b) False
20. 20.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a funnel or spoon (b) a comb (c) vinegar (d) an empty bottle
21. 21.True or false: bad grains from rice is done by winnowing. (a) True (b) False
22. 22.🛟 Why should you never drink water just because it looks clear? (a) germs are invisible (b) clear water is sweet (c) clear water is hot (d) clear water is salty
23. 23.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) how clear the water is (b) the same funnel (c) the same muddy water (d) the same glass
24. 24.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same glass is what we measure. (a) True (b) False
25. 25.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) a magnet (c) a cotton bud (d) an adult with an iron
26. 26.True or false: an empty bottle is needed for the fizzy balloon. (a) False (b) True
27. 27.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a comb (b) water (c) a dropper or spoon (d) soap solution
28. 28.True or false: small pebbles dissolves in water. (a) False (b) True
29. 29.🧺 Which of these is needed for the muddy water filter? (a) a magnet (b) sand and pebbles (c) a battery cell (d) yeast
30. 30.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “sun or shade”? (a) we measure it (b) we change it (c) we keep it the same
31. 31.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
32. 32.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
33. 33.🫧 Which of these is a base? (a) orange juice (b) salt water (c) vinegar (d) baking soda water
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) yeast (d) a few hours
35. 35.True or false: a battery cell is needed for the secret lemon message. (a) True (b) False
36. 36.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
37. 37.🌱 Which of these is not needed for a seed to sprout? (a) water (b) air (c) soil (d) warmth
38. 38.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it turns blue (b) it grows faster (c) it wilts and droops (d) it flowers more
39. 39.🌱 Which of these is not needed for a seed to sprout? (a) warmth (b) water (c) salt (d) air
40. 40.🍞 Which of these is something yeast does not need? (a) time (b) sunlight (c) warm water (d) sugar

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