Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 70 · 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.🌱 Is soil needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
2. 2.🫧 Is orange juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
3. 3.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a magnet (c) a mirror (d) a dropper or spoon
4. 4.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
5. 5.⚖️ 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 change it (b) we measure it (c) we keep it the same
6. 6.True or false: a mirror is needed for the leafy bag test. (a) True (b) False
7. 7.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) turmeric powder (c) a clean glass (d) cotton or cloth
8. 8.True or false: seeds in the freezer sprouts in a few days. (a) True (b) False
9. 9.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
10. 10.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the kind of juice (b) the ironing time (c) how dark the writing is
11. 11.🔮 Can the brown writing go back to being invisible? (a) no, it stays brown (b) yes, if cooled (c) yes, in the dark (d) yes, if shaken
12. 12.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: size of the balloon is kept the same. (a) True (b) False
13. 13.🧺 Do we need a battery cell for the muddy water filter? (a) needed (b) not needed
14. 14.True or false: sugar dissolves in water. (a) True (b) False
15. 15.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a seed (b) baking soda (c) a tray for spills (d) a balloon
16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we measure it (c) we keep it the same
17. 17.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
18. 18.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we keep it the same (c) we measure it
20. 20.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we keep it the same (b) we measure it (c) we change it
21. 21.True or false: turmeric powder is needed for making butter. (a) True (b) False
22. 22.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
23. 23.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the size of the plant”? (a) we measure it (b) we keep it the same (c) we change it
24. 24.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) sugar water (c) detergent water (d) baking soda water
25. 25.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
26. 26.🧺 Do we need a mirror for the fizzy balloon? (a) needed (b) not needed
27. 27.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) lemon juice (b) a balloon (c) white paper (d) a cotton bud
28. 28.True or false: baking soda dissolves in water. (a) True (b) False
29. 29.🧺 Which of these is not needed for the secret lemon message? (a) a small bowl (b) a cotton bud (c) white paper (d) a balloon
30. 30.🪴 Which part of a plant does this job: give out water vapour? (a) leaves (b) flower (c) stem (d) roots
31. 31.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is what we measure. (a) False (b) True
32. 32.🔍 Which is the odd one out? (a) milk turning to curd (b) cooking an egg (c) rusting iron (d) freezing water
33. 33.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is kept the same. (a) True (b) False
34. 34.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
35. 35.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a magnet (c) a mirror (d) water
36. 36.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows very little (c) it bursts at once (d) it grows much faster
37. 37.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
38. 38.🔍 Which is the odd one out? (a) vinegar (b) tamarind water (c) lemon juice (d) soap solution
39. 39.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a mirror (b) a funnel or spoon (c) an empty bottle (d) a tray for spills
40. 40.True or false: water is not needed for a seed to sprout. (a) True (b) False

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