Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 670 · 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? Which of these is what we measure? (a) the colour we see (b) the liquid we test (c) the turmeric paper (d) the light we look in
2. 2.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a balloon (b) a seed (c) an empty bottle (d) baking soda
3. 3.🍞 Which of these is something yeast needs? (a) sunlight (b) salt (c) vinegar (d) sugar
4. 4.True or false: yeast is needed for the secret lemon message. (a) False (b) True
5. 5.🛟 Why must a plastic bag never go over anyone’s head? (a) it changes colour (b) it can block breathing (c) it is too big (d) it gets wet
6. 6.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) vinegar (c) soap solution (d) sugar water
7. 7.🫧 Which of these is a base? (a) detergent water (b) plain water (c) sugar water (d) lemon juice
8. 8.🫗 How do we separate husk from rice grain? (a) winnowing (b) filtering (c) evaporating (d) handpicking
9. 9.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) True (b) False
10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the colour we see (b) the light we look in (c) the liquid we test (d) the turmeric paper
11. 11.🪴 Which part of a plant does this job: hold the plant in soil? (a) flower (b) leaves (c) stem (d) roots
12. 12.🍋 Which of these steps is a job for an adult? (a) plugging in the iron (b) letting the paper dry (c) dipping the cotton bud (d) writing the message
13. 13.True or false: turmeric powder is not needed for the secret lemon message. (a) False (b) True
14. 14.True or false: soap solution is needed for the turmeric test. (a) False (b) True
15. 15.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) much more water (b) much less water (c) exactly the same (d) it fills with soil
16. 16.True or false: a mirror is needed for making butter. (a) True (b) False
17. 17.🛟 How should the plastic bag be tied around the branch? (a) with a hot glue gun (b) with sharp wire (c) gently, not too tight (d) as tight as possible
18. 18.True or false: a comb is needed for the fizzy balloon. (a) True (b) False
19. 19.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) next to the baby (c) on the edge of a table (d) safe from small children
20. 20.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) the same bottle (b) spoons of baking soda (c) size of the balloon (d) the kind of balloon
21. 21.🔍 Which is the odd one out? (a) lemon juice (b) tamarind water (c) detergent water (d) vinegar
22. 22.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they glow (b) they sprout faster (c) they grow fruit (d) they do not sprout
23. 23.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
24. 24.True or false: a mirror is needed for the fizzy balloon. (a) False (b) True
25. 25.True or false: lemon juice is needed for the secret lemon message. (a) False (b) True
26. 26.🧺 Do we need a mirror for the leafy bag test? (a) not needed (b) needed
27. 27.🍞 Which of these is something yeast does not need? (a) a magnet (b) warm water (c) time (d) sugar
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we measure it (b) we keep it the same (c) we change it
29. 29.🔍 Which is the odd one out? (a) lemon juice (b) curd (c) baking soda water (d) tamarind water
30. 30.🧂 Which of these dissolves in water? (a) chalk powder (b) table salt (c) sawdust (d) sand
31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we keep it the same (b) we change it (c) we measure it
32. 32.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) detergent water (d) vinegar
33. 33.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) a battery cell (c) soap solution (d) lemon juice
34. 34.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a funnel (b) yeast (c) cotton or cloth (d) muddy water
35. 35.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the same jar is the one thing we change. (a) False (b) True
36. 36.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the amount of vinegar is what we measure. (a) True (b) False
37. 37.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
38. 38.🧺 Which of these is needed for sprouting seeds? (a) a magnet (b) turmeric powder (c) a balloon (d) moong seeds
39. 39.🛟 Why should you never drink water just because it looks clear? (a) clear water is sweet (b) germs are invisible (c) clear water is salty (d) clear water is hot
40. 40.📘 Is the fizzing a sign that a new substance is made? (a) it is only melting (b) yes, a new gas forms (c) no, nothing changes (d) it is only dissolving

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