Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 686 · 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: a magnet is needed for the secret lemon message. (a) True (b) False
2. 2.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
3. 3.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we keep it the same (b) we measure it (c) we change it
4. 4.True or false: plugging in the iron is a job a child can do. (a) True (b) False
5. 5.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a small bowl (b) water (c) a magnet (d) cotton wool
6. 6.True or false: plain water keeps turmeric yellow. (a) False (b) True
7. 7.🔮 Can the brown writing go back to being invisible? (a) yes, if shaken (b) yes, in the dark (c) yes, if cooled (d) no, it stays brown
8. 8.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) warm water (c) a mirror (d) sugar
9. 9.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) soap solution (d) salt water
10. 10.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) lemon juice (b) a battery cell (c) a small bowl (d) an adult with an iron
11. 11.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
12. 12.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) turmeric powder (d) dry yeast
13. 13.True or false: a clean glass is not needed for the muddy water filter. (a) True (b) False
14. 14.🫗 How do we separate bran from wheat flour? (a) evaporating (b) filtering (c) winnowing (d) sieving
15. 15.🪴 Through which part does a plant take in water from the soil? (a) the roots (b) the fruits (c) the leaves (d) the flowers
16. 16.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) it turns to bread (c) the balloon is smaller (d) the balloon is bigger
17. 17.🍞 Which of these is something yeast needs? (a) vinegar (b) warm water (c) a magnet (d) salt
18. 18.🪴 Which part of a plant does this job: make food in sunlight? (a) flower (b) stem (c) roots (d) leaves
19. 19.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a balloon (c) lemon juice (d) a magnet
20. 20.🌱 Will these sprout: wet seeds in the dark? (a) sprouts (b) does not sprout
21. 21.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) safe from small children (c) next to the baby (d) on the edge of a table
22. 22.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
23. 23.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
24. 24.True or false: vinegar is needed for the fizzy balloon. (a) True (b) False
25. 25.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
26. 26.🌱 Will these sprout: seeds in the freezer? (a) sprouts (b) does not sprout
27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we measure it (b) we keep it the same (c) we change it
28. 28.🍞 Which of these is something yeast needs? (a) a magnet (b) sugar (c) vinegar (d) salt
29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) True (b) False
30. 30.True or false: dipping the cotton bud is a job for an adult. (a) False (b) True
31. 31.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
32. 32.True or false: lemon juice is neutral. (a) True (b) False
33. 33.🧺 Which of these is not needed for the secret lemon message? (a) a small bowl (b) turmeric powder (c) lemon juice (d) a cotton bud
34. 34.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) almost nothing (b) blue words (c) a rainbow (d) dark brown words
35. 35.🛟 What should you do after handling muddy water? (a) nothing is needed (b) lick your fingers (c) wash hands afterwards (d) wipe hands on face
36. 36.🌱 Which of these does not sprout? (a) seeds on wet cotton (b) boiled seeds (c) wet seeds by a window (d) wet seeds in the dark
37. 37.🧺 Which of these is not needed for the leafy bag test? (a) a rubber band (b) a potted plant (c) a mirror (d) a clear plastic bag
38. 38.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a comb (c) sugar (d) a balloon
39. 39.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) neutral (c) an acid
40. 40.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a balloon (b) white paper strips (c) water (d) soap solution

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