Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 45 · 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.🫗 Which of these is done by winnowing? (a) husk from rice grain (b) tea leaves from tea (c) small stones from dal (d) bad grains from rice
2. 2.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the ironing time is kept the same. (a) False (b) True
3. 3.True or false: a comb is needed for the fizzy balloon. (a) False (b) True
4. 4.⚖️ 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
5. 5.🧺 Which of these is needed for the fizzy balloon? (a) a comb (b) a battery cell (c) a funnel or spoon (d) a seed
6. 6.🛟 How should the plastic bag be tied around the branch? (a) gently, not too tight (b) as tight as possible (c) with a hot glue gun (d) with sharp wire
7. 7.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the kind of juice”? (a) we change it (b) we measure it (c) we keep it the same
8. 8.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) it turns to sand (b) it turns to sugar (c) no, salt passes through (d) yes, all of it
9. 9.🧺 Which of these is needed for making butter? (a) turmeric powder (b) yeast (c) a bowl (d) a magnet
10. 10.True or false: orange juice is a base. (a) False (b) True
11. 11.🧺 Do we need a magnet for sprouting seeds? (a) not needed (b) needed
12. 12.🔍 Which is the odd one out? (a) glucose powder (b) small pebbles (c) chalk powder (d) sawdust
13. 13.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a magnet (c) warm water (d) a battery cell
14. 14.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) yeast (c) turmeric powder (d) salt
15. 15.True or false: salt water is an acid. (a) False (b) True
16. 16.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
17. 17.🌱 Is sunlight needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
18. 18.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) moong seeds (b) a balloon (c) a few days (d) cotton wool
19. 19.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the cream temperature”? (a) we keep it the same (b) we change it (c) we measure it
20. 20.True or false: freezing water is a change that cannot be undone. (a) True (b) False
21. 21.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a balloon (b) a cotton bud (c) lemon juice (d) an adult with an iron
22. 22.True or false: muddy water is needed for the muddy water filter. (a) True (b) False
23. 23.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the time we wait is what we measure. (a) False (b) True
24. 24.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) helium (b) carbon dioxide (c) hydrogen (d) oxygen
25. 25.⚖️ Fair test — do seeds need water to sprout? True or false: the same place is kept the same. (a) False (b) True
26. 26.🫧 Is curd an acid, a base or neutral? (a) a base (b) an acid (c) neutral
27. 27.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) bigger crystals (c) liquid crystals (d) smaller crystals
28. 28.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) warm water (c) dry yeast (d) a magnet
29. 29.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) a comb (c) an empty bottle (d) a balloon
30. 30.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “how hard we shake”? (a) we keep it the same (b) we change it (c) we measure it
31. 31.🔮 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
32. 32.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we change it (b) we measure it (c) we keep it the same
33. 33.🧺 Which of these is not needed for sprouting seeds? (a) a small bowl (b) water (c) yeast (d) moong seeds
34. 34.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) the same bowls (b) how many seeds sprout (c) the number of seeds (d) wet or dry cotton
35. 35.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) no, never (b) they melt (c) yes, they sprout (d) they turn to stones
36. 36.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
37. 37.🔍 Which is the odd one out? (a) cooking oil (b) chalk powder (c) baking soda (d) sand
38. 38.🔍 Which is the odd one out? (a) vinegar (b) curd (c) tamarind water (d) salt water
39. 39.True or false: salt from sea water is done by handpicking. (a) True (b) False
40. 40.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed

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