Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 742 · 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 not needed for the leafy bag test? (a) a rubber band (b) a potted plant (c) vinegar (d) a few hours
2. 2.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) much less water (b) much more water (c) exactly the same (d) it fills with soil
3. 3.🛟 What should you do if vinegar splashes in your eye? (a) rub it hard (b) add baking soda (c) rinse with clean water (d) ignore it
4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we measure it (b) we change it (c) we keep it the same
5. 5.🧂 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
6. 6.🛟 Why must the jar lid be screwed on tightly? (a) so air gets out (b) so it gets hot (c) so cream does not spill (d) so it turns yellow
7. 7.🫧 Which of these is a base? (a) sugar water (b) plain water (c) detergent water (d) curd
8. 8.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap is an acid (c) soap is hot (d) soap water is a base
9. 9.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) soap solution (c) vinegar (d) lemon juice
10. 10.True or false: turmeric powder is not needed for the turmeric test. (a) False (b) True
11. 11.🫗 How do we separate salt from sea water? (a) evaporating (b) filtering (c) handpicking (d) sieving
12. 12.🧺 Which of these is needed for the secret lemon message? (a) a magnet (b) a mirror (c) yeast (d) an adult with an iron
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) the kind of salt (b) the same dish (c) sunny or shady place (d) the amount of water
14. 14.🧺 Do we need a funnel for the muddy water filter? (a) needed (b) not needed
15. 15.🍋 Why can’t you see the lemon writing once it dries? (a) the paper ate it (b) dry juice is see-through (c) the ink is magnetic (d) it turned into air
16. 16.🫧 Which of these is neutral? (a) baking soda water (b) vinegar (c) tamarind water (d) plain water
17. 17.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
18. 18.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) white paper strips (c) a dropper or spoon (d) a comb
19. 19.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
20. 20.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
21. 21.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
22. 22.🧺 Which of these is needed for the fizzy balloon? (a) vinegar (b) a seed (c) a battery cell (d) sugar
23. 23.True or false: a battery cell is needed for the leafy bag test. (a) True (b) False
24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the light we look in (b) the number of drops (c) the colour we see (d) the liquid we test
25. 25.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they sprout faster (b) they glow (c) they grow fruit (d) they do not sprout
26. 26.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) sugar (c) a battery cell (d) a balloon
27. 27.True or false: turmeric powder is not needed for the leafy bag test. (a) True (b) False
28. 28.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
29. 29.🪴 Which of these is a job of the roots? (a) carry water upward (b) give out water vapour (c) make seeds (d) take in water from soil
30. 30.🧺 Which of these is needed for the leafy bag test? (a) a magnet (b) turmeric powder (c) a clear plastic bag (d) yeast
31. 31.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is kept the same. (a) False (b) True
32. 32.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a mirror (c) turmeric powder (d) a small bottle
33. 33.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) oxygen (b) hydrogen (c) carbon dioxide (d) helium
34. 34.🧈 Which of these is a change that can be undone? (a) baking a cake (b) cooking an egg (c) browning lemon ink (d) dissolving salt
35. 35.🧺 Do we need turmeric powder for the muddy water filter? (a) needed (b) not needed
36. 36.⚖️ 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) False (b) True
37. 37.⚖️ Fair test — do seeds need water to sprout? True or false: the number of seeds is kept the same. (a) True (b) False
38. 38.True or false: salt water is an acid. (a) False (b) True
39. 39.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) baking soda water (d) salt water
40. 40.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) lemon juice (c) tamarind water (d) detergent water

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