Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 38 · 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.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
2. 2.🧈 Before the butter appears, what does the cream turn into? (a) ice (b) powder (c) thick whipped cream (d) clear water
3. 3.🧺 Do we need turmeric powder for the muddy water filter? (a) not needed (b) needed
4. 4.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “how clear the water is”? (a) we change it (b) we keep it the same (c) we measure it
5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False
6. 6.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
7. 7.🔍 Which is the odd one out? (a) chalk powder (b) sand (c) cooking oil (d) table salt
8. 8.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is what we measure. (a) True (b) False
9. 9.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) a small bottle (c) dry yeast (d) sugar
11. 11.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) sugar crystals form (c) it turns to butter (d) it turns to oil
12. 12.🫧 Which of these is an acid? (a) curd (b) baking soda water (c) plain water (d) sugar water
13. 13.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it wilts and droops (b) it grows faster (c) it flowers more (d) it turns blue
14. 14.🫗 Why does filtered muddy water look clearer? (a) the mud dissolves (b) the filter traps mud (c) the water evaporates (d) the filter adds soap
15. 15.🧺 Which of these is not needed for making butter? (a) turmeric powder (b) a timer (c) cold water to rinse (d) a jar with a tight lid
16. 16.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a balloon (b) a tray for spills (c) baking soda (d) a mirror
17. 17.🔍 Which is the odd one out? (a) tamarind water (b) plain water (c) curd (d) vinegar
18. 18.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) dark brown words (b) blue words (c) almost nothing (d) a rainbow
19. 19.🧺 Which of these is needed for the secret lemon message? (a) a balloon (b) a cotton bud (c) a mirror (d) yeast
20. 20.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) put it in your mouth (c) seal it in a glass jar (d) keep it away from eyes
21. 21.🫗 Is filtered pond water safe to drink? (a) yes, if it is clear (b) yes, if it is cold (c) yes, always (d) no, germs may stay
22. 22.True or false: ironing the paper is a job a child can do. (a) True (b) False
23. 23.True or false: soap solution turns turmeric reddish-brown. (a) False (b) True
24. 24.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) how dark the writing is (b) the kind of juice (c) the same cotton bud
25. 25.🧺 Do we need white paper for the secret lemon message? (a) needed (b) not needed
26. 26.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) the cream temperature (b) time to make butter (c) how hard we shake
27. 27.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) exactly the same (b) much more water (c) much less water (d) it fills with soil
28. 28.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a magnet (b) a rubber band (c) a potted plant (d) a clear plastic bag
29. 29.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) rusting iron (c) dissolving salt (d) baking a cake
30. 30.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) use only kitchen items (c) sip each liquid (d) sniff each bottle hard
31. 31.🧺 Do we need vinegar for the fizzy balloon? (a) not needed (b) needed
32. 32.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) pour it down the sink (c) put it in your mouth (d) throw it at a wall
33. 33.🧺 Which of these is needed for making butter? (a) cold water to rinse (b) a battery cell (c) a mirror (d) yeast
34. 34.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) a funnel or spoon (c) an empty bottle (d) sugar
35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we change it (c) we measure it
36. 36.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) plain water (c) lemon juice (d) soap solution
37. 37.🧺 Do we need a mirror for sprouting seeds? (a) not needed (b) needed
38. 38.True or false: baking soda water turns turmeric reddish-brown. (a) True (b) False
39. 39.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
40. 40.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) green (c) bright blue (d) reddish

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