Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 542 · 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 cotton bud is not needed for the secret lemon message. (a) True (b) False
2. 2.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a piece of string (c) a battery cell (d) warm water
3. 3.🍞 Which of these is something yeast does not need? (a) a magnet (b) time (c) sugar (d) warm water
4. 4.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is what we measure. (a) True (b) False
5. 5.🧺 Which of these is not needed for making butter? (a) a balloon (b) fresh cream (c) a bowl (d) cold water to rinse
6. 6.🧺 Do we need a battery cell for sprouting seeds? (a) not needed (b) needed
7. 7.🛟 How should the plastic bag be tied around the branch? (a) with sharp wire (b) with a hot glue gun (c) gently, not too tight (d) as tight as possible
8. 8.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same muddy water”? (a) we measure it (b) we keep it the same (c) we change it
9. 9.🧺 Which of these is needed for the muddy water filter? (a) turmeric powder (b) a funnel (c) a battery cell (d) yeast
10. 10.True or false: vinegar is something yeast does not need. (a) False (b) True
11. 11.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
12. 12.🫗 How do we separate tea leaves from tea? (a) evaporating (b) winnowing (c) handpicking (d) filtering
13. 13.True or false: make food in sunlight is a job of the leaves. (a) False (b) True
14. 14.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) no crystals (c) smaller crystals (d) liquid crystals
15. 15.🌱 Will these sprout: seeds on dry cotton? (a) sprouts (b) does not sprout
16. 16.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) size of the balloon (b) the kind of balloon (c) spoons of baking soda (d) the same bottle
17. 17.True or false: tamarind water is a base. (a) True (b) False
18. 18.🧺 Do we need yeast for sprouting seeds? (a) needed (b) not needed
19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we keep it the same (c) we change it
20. 20.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is kept the same. (a) False (b) True
21. 21.True or false: salt is not needed for growing salt crystals. (a) False (b) True
22. 22.True or false: plugging in the iron is a job a child can do. (a) True (b) False
23. 23.🧺 Which of these is needed for sprouting seeds? (a) a mirror (b) a few days (c) a magnet (d) a balloon
24. 24.🪴 Which of these is a job of the roots? (a) hold up the leaves (b) give out water vapour (c) take in water from soil (d) carry water upward
25. 25.🧺 Do we need a mirror for the secret lemon message? (a) needed (b) not needed
26. 26.🟡 Which of these keeps turmeric yellow? (a) vinegar (b) baking soda water (c) detergent water (d) soap solution
27. 27.True or false: a clear plastic bag is needed for the leafy bag test. (a) False (b) True
28. 28.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
29. 29.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) the same jar (b) how hard we shake (c) time to make butter (d) the cream temperature
30. 30.True or false: muddy water is not needed for the muddy water filter. (a) True (b) False
31. 31.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we change it (b) we keep it the same (c) we measure it
32. 32.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
33. 33.🫧 What do you see when baking soda meets vinegar? (a) nothing at all (b) it glows in the dark (c) it turns to ice (d) lots of fizzy bubbles
34. 34.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
35. 35.True or false: a magnet is not needed for the turmeric test. (a) False (b) True
36. 36.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
37. 37.True or false: sugar is something yeast needs. (a) False (b) True
38. 38.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is kept the same. (a) True (b) False
39. 39.🌱 Which of these does not sprout? (a) wet seeds by a window (b) seeds on wet cotton (c) wet seeds in the dark (d) boiled seeds
40. 40.True or false: cotton or cloth is not needed for the muddy water filter. (a) True (b) False

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