Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 87 · 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.🧺 Do we need an adult with an iron for the secret lemon message? (a) not needed (b) needed
2. 2.🫗 How do we separate bran from wheat flour? (a) handpicking (b) sieving (c) evaporating (d) filtering
3. 3.🛟 Why must children keep their fingers away from the iron? (a) it is cold (b) it can burn skin (c) it is sticky (d) it is magnetic
4. 4.🔮 Can the brown writing go back to being invisible? (a) no, it stays brown (b) yes, if cooled (c) yes, if shaken (d) yes, in the dark
5. 5.🛟 What should you do after touching soil or seeds? (a) skip washing (b) wash your hands (c) lick your fingers (d) rub your eyes
6. 6.🧂 Which of these dissolves in water? (a) sand (b) small pebbles (c) sugar (d) chalk powder
7. 7.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) nobody needs to (d) a grown-up
8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) False (b) True
9. 9.🧺 Do we need a dropper or spoon for the turmeric test? (a) needed (b) not needed
10. 10.🌱 Which of these is not needed for a seed to sprout? (a) salt (b) warmth (c) water (d) air
11. 11.True or false: tamarind water is an acid. (a) True (b) False
12. 12.True or false: a funnel is not needed for the muddy water filter. (a) True (b) False
13. 13.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it shrinks to nothing (c) it turns to bread (d) the balloon is smaller
14. 14.⚖️ Fair test — do seeds need water to sprout? True or false: the same bowls is what we measure. (a) True (b) False
15. 15.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the size of the plant is what we measure. (a) True (b) False
16. 16.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is kept the same. (a) True (b) False
17. 17.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
18. 18.🔍 Which is the odd one out? (a) folding paper (b) freezing water (c) melting butter (d) milk turning to curd
19. 19.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) turmeric powder (c) a mirror (d) soap solution
20. 20.True or false: moong seeds is needed for sprouting seeds. (a) True (b) False
21. 21.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a tray for spills (b) baking soda (c) sugar (d) vinegar
22. 22.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
23. 23.⚖️ Fair test — do seeds need water to sprout? True or false: wet or dry cotton is the one thing we change. (a) False (b) True
24. 24.True or false: make food in sunlight is a job of the leaves. (a) False (b) True
25. 25.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) moong seeds (b) cotton wool (c) water (d) a magnet
26. 26.⚖️ 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
27. 27.🫗 Which of these is done by sieving? (a) tea leaves from tea (b) chaff from wheat grain (c) sugar from sugar water (d) gravel from fine sand
28. 28.🧺 Do we need a battery cell for the fizzy balloon? (a) needed (b) not needed
29. 29.🍞 Which of these is something yeast needs? (a) vinegar (b) a magnet (c) warm water (d) sunlight
30. 30.⚖️ 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
31. 31.🛟 What should you do after handling muddy water? (a) nothing is needed (b) wipe hands on face (c) lick your fingers (d) wash hands afterwards
32. 32.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) moong seeds (b) turmeric powder (c) cotton wool (d) a few days
33. 33.🛟 Which safety rule fits the fizzy balloon experiment? (a) keep it away from eyes (b) shake it near your face (c) seal it in a glass jar (d) put it in your mouth
34. 34.🧺 Which of these is not needed for the muddy water filter? (a) muddy water (b) a clean glass (c) a battery cell (d) a funnel
35. 35.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) turmeric powder (c) a balloon (d) dry yeast
36. 36.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the iron setting (b) how dark the writing is (c) the same paper (d) the kind of juice
37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we measure it (b) we keep it the same (c) we change it
38. 38.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “time to make butter”? (a) we change it (b) we keep it the same (c) we measure it
39. 39.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it turns to sugar (c) the yeast is killed (d) it glows
40. 40.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a mirror (c) a battery cell (d) dry yeast

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