Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 226 · 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.🌱 Will these sprout: seeds in the freezer? (a) sprouts (b) does not sprout
2. 2.🫗 How do we separate small stones from dal? (a) evaporating (b) handpicking (c) sieving (d) filtering
3. 3.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) clearer (b) hot (c) muddier (d) salty
4. 4.True or false: a magnet is not needed for making butter. (a) True (b) False
5. 5.🪴 Which part of a plant does this job: take in water from soil? (a) leaves (b) flower (c) stem (d) roots
6. 6.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same bowls”? (a) we change it (b) we keep it the same (c) we measure it
7. 7.🌱 Is water needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
8. 8.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
9. 9.🛟 What should you do if vinegar splashes in your eye? (a) ignore it (b) add baking soda (c) rub it hard (d) rinse with clean water
10. 10.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) moong seeds (b) water (c) a small bowl (d) turmeric powder
11. 11.True or false: tamarind water is an acid. (a) False (b) True
12. 12.True or false: bran from wheat flour is done by evaporating. (a) True (b) False
13. 13.🧺 Do we need a magnet for making butter? (a) not needed (b) needed
14. 14.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we change it (b) we measure it (c) we keep it the same
15. 15.🧺 Which of these is needed for the secret lemon message? (a) yeast (b) turmeric powder (c) a magnet (d) lemon juice
16. 16.True or false: a battery cell is not needed for the secret lemon message. (a) False (b) True
17. 17.🛟 What should you do after handling muddy water? (a) nothing is needed (b) wash hands afterwards (c) lick your fingers (d) wipe hands on face
18. 18.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) feed them to pets (b) throw them at friends (c) never put seeds in mouth (d) eat a few to check
19. 19.⚖️ 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 glass (c) the filter material
20. 20.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it turns blue (b) there is no change (c) it shrinks (d) it grows bigger
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we change it (b) we measure it (c) we keep it the same
22. 22.🪴 Which of these is a job of the stem? (a) make seeds (b) hold up the leaves (c) take in water from soil (d) make food in sunlight
23. 23.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
24. 24.🔮 The fizzing stops after a while. Why? (a) an ingredient ran out (b) the gas froze (c) the balloon got cold (d) the bottle got tired
25. 25.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
26. 26.🧈 Which of these is a change that can be undone? (a) folding paper (b) milk turning to curd (c) baking a cake (d) cooking an egg
27. 27.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the same jar”? (a) we keep it the same (b) we measure it (c) we change it
28. 28.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) a magnet (d) a balloon
29. 29.🫧 Is curd an acid, a base or neutral? (a) a base (b) an acid (c) neutral
30. 30.🫗 Why does filtered muddy water look clearer? (a) the filter traps mud (b) the mud dissolves (c) the filter adds soap (d) the water evaporates
31. 31.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) lemon juice (c) white paper (d) a balloon
32. 32.🧺 Which of these is needed for sprouting seeds? (a) a balloon (b) yeast (c) moong seeds (d) turmeric powder
33. 33.🫗 Is filtered pond water safe to drink? (a) yes, always (b) yes, if it is clear (c) no, germs may stay (d) yes, if it is cold
34. 34.⚖️ 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) the time we wait (b) sun or shade (c) amount of water drops
35. 35.⚖️ 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 keep it the same (b) we change it (c) we measure it
36. 36.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the iron setting is kept the same. (a) False (b) True
37. 37.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) dark brown words (b) a rainbow (c) almost nothing (d) blue words
38. 38.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a magnet (b) muddy water (c) a clean glass (d) a funnel
39. 39.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) green (c) it stays white (d) bright blue
40. 40.🧈 Before the butter appears, what does the cream turn into? (a) thick whipped cream (b) powder (c) ice (d) clear water

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