Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 945 · 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.True or false: turmeric powder is not needed for sprouting seeds. (a) False (b) True
2. 2.🫗 How do we separate small stones from dal? (a) filtering (b) handpicking (c) evaporating (d) sieving
3. 3.🔍 Which is the odd one out? (a) putting the iron away (b) plugging in the iron (c) ironing the paper (d) writing the message
4. 4.True or false: a balloon is needed for the secret lemon message. (a) False (b) True
5. 5.🧺 Which of these is needed for making butter? (a) a magnet (b) turmeric powder (c) a timer (d) a balloon
6. 6.🔮 The fizzing stops after a while. Why? (a) the balloon got cold (b) the bottle got tired (c) an ingredient ran out (d) the gas froze
7. 7.True or false: reading the message is a job a child can do. (a) False (b) True
8. 8.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
9. 9.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is the one thing we change. (a) True (b) False
10. 10.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the water temperature”? (a) we change it (b) we measure it (c) we keep it the same
11. 11.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
12. 12.🧺 Do we need a mirror for sprouting seeds? (a) not needed (b) needed
13. 13.🍋 Secret message: who does this step — putting the iron away? (a) an adult does it (b) a child can do it
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a spoon (c) salt (d) a piece of string
15. 15.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) a small bowl (c) white paper (d) turmeric powder
16. 16.🔍 Which is the odd one out? (a) folding paper (b) melting ice (c) milk turning to curd (d) dissolving salt
17. 17.True or false: detergent water is a base. (a) True (b) False
18. 18.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
19. 19.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) put it in your mouth (c) pour it down the sink (d) throw it at a wall
20. 20.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is the one thing we change. (a) True (b) False
21. 21.True or false: a comb is not needed for the yeast balloon. (a) True (b) False
22. 22.🔍 Which is the odd one out? (a) water (b) air (c) warmth (d) soil
23. 23.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) the cream temperature (b) the same jar (c) time to make butter (d) how hard we shake
24. 24.🛟 What should you do after handling muddy water? (a) wash hands afterwards (b) lick your fingers (c) nothing is needed (d) wipe hands on face
25. 25.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) sip each liquid (c) use only kitchen items (d) mix bathroom cleaners
26. 26.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of sugar”? (a) we keep it the same (b) we change it (c) we measure it
27. 27.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) an empty bottle (b) sugar (c) a funnel or spoon (d) a tray for spills
28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we keep it the same (c) we measure it
29. 29.🫧 Which of these is a base? (a) baking soda water (b) vinegar (c) plain water (d) curd
30. 30.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) the filter material (b) how clear the water is (c) the amount poured (d) the same muddy water
31. 31.🔮 Predict: the adult irons for only one second. What happens? (a) writing stays faint (b) it gets darker (c) writing turns green (d) the paper floats
32. 32.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
33. 33.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
34. 34.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) soap solution (c) salt water (d) lemon juice
35. 35.🫗 Which of these is done by winnowing? (a) chaff from wheat grain (b) gravel from fine sand (c) sugar from sugar water (d) small stones from dal
36. 36.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) dissolving salt (c) milk turning to curd (d) melting butter
37. 37.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a magnet (b) an empty bottle (c) vinegar (d) baking soda
38. 38.🌱 Will these sprout: seeds on wet cotton? (a) sprouts (b) does not sprout
39. 39.🔮 Can the brown writing go back to being invisible? (a) yes, in the dark (b) yes, if cooled (c) no, it stays brown (d) yes, if shaken
40. 40.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) muddier (b) hot (c) clearer (d) salty

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