Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 64 · 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 job of the roots? (a) hold up the leaves (b) make food in sunlight (c) hold the plant in soil (d) carry water upward
2. 2.True or false: soap solution is not needed for the turmeric test. (a) True (b) False
3. 3.True or false: melting butter is a change that can be undone. (a) False (b) True
4. 4.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same cotton bud”? (a) we change it (b) we measure it (c) we keep it the same
5. 5.True or false: fresh cream is not needed for making butter. (a) True (b) False
6. 6.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) cotton or cloth (c) a balloon (d) a funnel
7. 7.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the same jar is kept the same. (a) False (b) True
8. 8.⚖️ Fair test — do seeds need water to sprout? True or false: the same bowls is kept the same. (a) False (b) True
9. 9.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “amount of water drops”? (a) we change it (b) we keep it the same (c) we measure it
10. 10.🫧 Which of these is a base? (a) orange juice (b) salt water (c) detergent water (d) curd
11. 11.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) the amount of cream (b) the same jar (c) how hard we shake (d) the cream temperature
12. 12.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold kills sugar (c) cold slows yeast down (d) cold makes it pink
13. 13.True or false: salt is needed for a seed to sprout. (a) True (b) False
14. 14.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) wet or dry cotton (b) how many seeds sprout (c) the kind of seeds (d) the same bowls
15. 15.True or false: sugar is not needed for the yeast balloon. (a) False (b) True
16. 16.True or false: a mirror is not needed for making butter. (a) True (b) False
17. 17.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
18. 18.🔍 Which is the odd one out? (a) vinegar (b) salt water (c) plain water (d) sugar water
19. 19.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a jar with a tight lid (b) a bowl (c) fresh cream (d) turmeric powder
20. 20.True or false: a balloon is needed for growing salt crystals. (a) False (b) True
21. 21.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “how dark the writing is”? (a) we change it (b) we keep it the same (c) we measure it
22. 22.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns black (c) it turns blue (d) it stays yellow
23. 23.🔮 The fizzing stops after a while. Why? (a) the bottle got tired (b) an ingredient ran out (c) the gas froze (d) the balloon got cold
24. 24.🧺 Which of these is needed for sprouting seeds? (a) a magnet (b) moong seeds (c) turmeric powder (d) a mirror
25. 25.🫗 How do we separate husk from rice grain? (a) handpicking (b) winnowing (c) sieving (d) filtering
26. 26.True or false: orange juice is an acid. (a) False (b) True
27. 27.🧺 Which of these is needed for the muddy water filter? (a) a magnet (b) turmeric powder (c) a mirror (d) cotton or cloth
28. 28.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the ironing time”? (a) we measure it (b) we keep it the same (c) we change it
29. 29.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
30. 30.True or false: a potted plant is not needed for the leafy bag test. (a) True (b) False
31. 31.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: size of the balloon is what we measure. (a) False (b) True
32. 32.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) an empty bottle (c) a battery cell (d) a tray for spills
33. 33.🧺 Do we need a jar with a tight lid for making butter? (a) not needed (b) needed
34. 34.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is kept the same? (a) the same kind of bag (b) sun or shade (c) amount of water drops
35. 35.🧺 Which of these is not needed for the secret lemon message? (a) lemon juice (b) turmeric powder (c) white paper (d) a cotton bud
36. 36.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of sugar”? (a) we keep it the same (b) we measure it (c) we change it
37. 37.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) salty (b) muddier (c) clearer (d) hot
38. 38.🛟 Why must the jar lid be screwed on tightly? (a) so cream does not spill (b) so air gets out (c) so it turns yellow (d) so it gets hot
39. 39.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) keep it for a month (c) put it in your mouth (d) throw it at a wall
40. 40.🧺 Do we need vinegar for the leafy bag test? (a) needed (b) not needed

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