Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 816 · 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 a base? (a) plain water (b) curd (c) salt water (d) baking soda water
2. 2.True or false: turmeric powder is needed for the muddy water filter. (a) False (b) True
3. 3.🧺 Which of these is needed for the muddy water filter? (a) yeast (b) a battery cell (c) a balloon (d) sand and pebbles
4. 4.True or false: ironing the paper is a job for an adult. (a) True (b) False
5. 5.True or false: fresh cream is not needed for making butter. (a) True (b) False
6. 6.🍞 Which of these is something yeast does not need? (a) time (b) salt (c) sugar (d) warm water
7. 7.🍋 Why does the lemon writing turn brown with heat? (a) heat adds colour (b) paper turns lemony (c) the iron is brown (d) the juice scorches first
8. 8.🌱 Which of these sprouts in a few days? (a) boiled seeds (b) seeds in the freezer (c) seeds on wet cotton (d) seeds on dry cotton
9. 9.True or false: putting the iron away is a job a child can do. (a) True (b) False
10. 10.🔮 Can the brown writing go back to being invisible? (a) no, it stays brown (b) yes, in the dark (c) yes, if shaken (d) yes, if cooled
11. 11.⚖️ Fair test — do seeds need water to sprout? What do we do with “the kind of seeds”? (a) we measure it (b) we change it (c) we keep it the same
12. 12.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
13. 13.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) soap solution (c) a comb (d) yeast
14. 14.True or false: bran from wheat flour is done by handpicking. (a) True (b) False
15. 15.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) soap solution (c) salt water (d) tamarind water
16. 16.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) False (b) True
18. 18.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a balloon (b) a small bowl (c) moong seeds (d) cotton wool
19. 19.🛟 What should you do after touching soil or seeds? (a) lick your fingers (b) skip washing (c) rub your eyes (d) wash your hands
20. 20.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) how clear the water is (b) the filter material (c) the same funnel (d) the same glass
21. 21.True or false: vinegar is something yeast does not need. (a) False (b) True
22. 22.🔍 Which is the odd one out? (a) melting butter (b) folding paper (c) milk turning to curd (d) freezing water
23. 23.🧺 Do we need a battery cell for the muddy water filter? (a) not needed (b) needed
24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) True (b) False
25. 25.🧺 Which of these is not needed for the leafy bag test? (a) a clear plastic bag (b) turmeric powder (c) a few hours (d) sunlight
26. 26.🧈 What is the watery liquid left after the butter forms? (a) oil (b) honey (c) buttermilk (d) vinegar
27. 27.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
28. 28.True or false: a tray for spills is not needed for the fizzy balloon. (a) True (b) False
29. 29.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a balloon (c) water (d) soap solution
30. 30.🍞 Which of these is something yeast needs? (a) time (b) sunlight (c) a magnet (d) salt
31. 31.🔍 Which is the odd one out? (a) baking soda water (b) vinegar (c) salt water (d) lemon juice
32. 32.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we keep it the same (b) we measure it (c) we change it
33. 33.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) a balloon (c) white paper strips (d) yeast
34. 34.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) a mirror (c) a small bowl (d) an adult with an iron
35. 35.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a magnet (c) yeast (d) salt
36. 36.🧺 Do we need a clean glass for the muddy water filter? (a) not needed (b) needed
37. 37.⚖️ 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
38. 38.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the amount of vinegar (b) size of the balloon (c) spoons of baking soda (d) the kind of balloon
39. 39.True or false: sugar dissolves in water. (a) True (b) False
40. 40.🍋 Secret message: who does this step — writing the message? (a) an adult does it (b) a child can do it

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