Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 192 · 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: tamarind water is a base. (a) True (b) False
2. 2.🪴 Which part of a plant does this job: take in water from soil? (a) roots (b) stem (c) leaves (d) flower
3. 3.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the amount of water (b) the water temperature (c) size of the balloon (d) the amount of sugar
4. 4.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) wash your hands (b) skip washing (c) rub your eyes (d) lick your fingers
5. 5.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is kept the same. (a) True (b) False
6. 6.🔍 Which is the odd one out? (a) ironing the paper (b) putting the iron away (c) reading the message (d) plugging in the iron
7. 7.🛟 Why should you never drink water just because it looks clear? (a) clear water is salty (b) clear water is hot (c) clear water is sweet (d) germs are invisible
8. 8.🔍 Which is the odd one out? (a) lemon juice (b) baking soda water (c) vinegar (d) tamarind water
9. 9.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) sugar (d) a comb
10. 10.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a funnel or spoon (b) baking soda (c) a battery cell (d) vinegar
11. 11.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we measure it (b) we change it (c) we keep it the same
12. 12.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) leaves pass through (b) both stay behind (c) tea stays behind (d) leaves stay behind
13. 13.True or false: a timer is needed for making butter. (a) False (b) True
14. 14.🧺 Which of these is needed for sprouting seeds? (a) turmeric powder (b) a balloon (c) a few days (d) yeast
15. 15.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same glass”? (a) we measure it (b) we keep it the same (c) we change it
16. 16.⚖️ 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 kind of plant (b) sun or shade (c) amount of water drops
17. 17.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a magnet (c) salt (d) a shallow dish
18. 18.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) blue words (b) dark brown words (c) a rainbow (d) almost nothing
19. 19.True or false: lemon juice turns turmeric reddish-brown. (a) True (b) False
20. 20.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same cotton bud”? (a) we change it (b) we keep it the same (c) we measure it
21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the colour we see (c) the number of drops
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a piece of string (d) a balloon
23. 23.🛟 Why must children keep their fingers away from the iron? (a) it is magnetic (b) it is cold (c) it can burn skin (d) it is sticky
24. 24.🧺 Which of these is needed for the fizzy balloon? (a) a battery cell (b) a comb (c) a magnet (d) baking soda
25. 25.🪴 Which part of a plant does this job: hold up the leaves? (a) roots (b) leaves (c) flower (d) stem
26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) False (b) True
27. 27.🧺 Do we need turmeric powder for the muddy water filter? (a) needed (b) not needed
28. 28.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a tray for spills (b) an empty bottle (c) a balloon (d) a mirror
29. 29.True or false: a cotton bud is needed for the secret lemon message. (a) False (b) True
30. 30.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same funnel is what we measure. (a) False (b) True
31. 31.🫗 Why does filtered muddy water look clearer? (a) the water evaporates (b) the mud dissolves (c) the filter adds soap (d) the filter traps mud
32. 32.True or false: rusting iron is a change that can be undone. (a) False (b) True
33. 33.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) yes, all of it (b) it turns to sand (c) it turns to sugar (d) no, salt passes through
34. 34.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) reddish-brown (c) it turns green (d) it stays yellow
35. 35.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
36. 36.🔍 Which is the odd one out? (a) rusting iron (b) folding paper (c) melting ice (d) freezing water
37. 37.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) lemon juice (c) a battery cell (d) turmeric powder
38. 38.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) lemon juice (c) a small bowl (d) a balloon
39. 39.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) sunlight (b) a potted plant (c) vinegar (d) a rubber band
40. 40.True or false: yeast is not needed for growing salt crystals. (a) True (b) False

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