Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 274 · 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.🧺 Do we need a clear plastic bag for the leafy bag test? (a) not needed (b) needed
2. 2.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) how hard we shake (b) time to make butter (c) the same jar (d) the amount of cream
3. 3.🪴 Which of these is a job of the roots? (a) carry water upward (b) give out water vapour (c) take in water from soil (d) make food in sunlight
4. 4.🫧 Which of these is neutral? (a) detergent water (b) salt water (c) lemon juice (d) tamarind water
5. 5.⚖️ 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 water temperature (b) size of the balloon (c) the same bottles (d) the amount of yeast
6. 6.True or false: hold up the leaves is a job of the leaves. (a) True (b) False
7. 7.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
8. 8.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it shrinks to nothing (c) the balloon is smaller (d) it turns to bread
9. 9.True or false: yeast is not needed for the turmeric test. (a) False (b) True
10. 10.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the size of the plant is kept the same. (a) True (b) False
11. 11.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the same paper (b) how dark the writing is (c) the iron setting (d) the kind of juice
12. 12.🔍 Which is the odd one out? (a) tamarind water (b) baking soda water (c) plain water (d) salt water
13. 13.🪴 Which of these is a job of the flower? (a) make food in sunlight (b) make seeds (c) hold up the leaves (d) carry water upward
14. 14.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
15. 15.🧺 Which of these is not needed for the leafy bag test? (a) a potted plant (b) a battery cell (c) a clear plastic bag (d) a rubber band
16. 16.🍋 Which of these steps is a job a child can do? (a) plugging in the iron (b) ironing the paper (c) letting the paper dry (d) putting the iron away
17. 17.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) milk turning to curd (c) cooking an egg (d) freezing water
18. 18.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
19. 19.📘 Is the fizzing a sign that a new substance is made? (a) no, nothing changes (b) yes, a new gas forms (c) it is only dissolving (d) it is only melting
20. 20.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns green (c) it turns blue (d) reddish-brown
21. 21.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) how clear the water is (b) the same muddy water (c) the filter material
22. 22.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) eat a few to check (b) never put seeds in mouth (c) feed them to pets (d) throw them at friends
23. 23.🧺 Which of these is needed for sprouting seeds? (a) a battery cell (b) a mirror (c) a small bowl (d) a magnet
24. 24.🔍 Which is the odd one out? (a) vinegar (b) plain water (c) soap solution (d) lemon juice
25. 25.🧈 Which tool is used in many Indian homes to churn curd into butter? (a) a rolling pin (b) a mathani (churner) (c) a sieve (d) a pressure cooker
26. 26.🫗 How do we separate bran from wheat flour? (a) winnowing (b) filtering (c) sieving (d) handpicking
27. 27.⚖️ 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 keep it the same (c) we change it
28. 28.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) safe from small children (d) on the edge of a table
29. 29.⚖️ Fair test — do seeds need water to sprout? True or false: how many seeds sprout is what we measure. (a) True (b) False
30. 30.🔍 Which is the odd one out? (a) reading the message (b) dipping the cotton bud (c) writing the message (d) ironing the paper
31. 31.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they grow fruit (b) they sprout faster (c) they glow (d) they do not sprout
32. 32.True or false: bad grains from rice is done by handpicking. (a) True (b) False
33. 33.True or false: muddy water is not needed for the muddy water filter. (a) False (b) True
34. 34.True or false: make seeds is a job of the stem. (a) False (b) True
35. 35.🧺 Do we need a funnel or spoon for the fizzy balloon? (a) not needed (b) needed
36. 36.🛟 The water for the yeast should be ___. (a) boiling hot (b) very salty (c) warm, not hot (d) ice cold
37. 37.🔮 The fizzing stops after a while. Why? (a) the gas froze (b) the bottle got tired (c) the balloon got cold (d) an ingredient ran out
38. 38.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) hot (b) salty (c) muddier (d) clearer
39. 39.True or false: a mirror is not needed for making butter. (a) False (b) True
40. 40.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of yeast”? (a) we change it (b) we keep it the same (c) we measure it

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