Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 15 · 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: baking soda water is an acid. (a) False (b) True
2. 2.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same muddy water is what we measure. (a) True (b) False
3. 3.True or false: make seeds is a job of the stem. (a) True (b) False
4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the number of drops (b) the light we look in (c) the liquid we test (d) the colour we see
5. 5.🧺 Do we need sugar for the fizzy balloon? (a) needed (b) not needed
6. 6.🔍 Which is the odd one out? (a) sunlight (b) vinegar (c) sugar (d) salt
7. 7.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) rusting iron (c) melting butter (d) milk turning to curd
8. 8.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) pour it down the sink (c) put it in your mouth (d) throw it at a wall
9. 9.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) warm water (c) sugar (d) a mirror
10. 10.True or false: sand and pebbles is not needed for the muddy water filter. (a) True (b) False
11. 11.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
12. 12.🧂 Which of these dissolves in water? (a) sawdust (b) chalk powder (c) sand (d) food colour
13. 13.True or false: mud from water is done by filtering. (a) False (b) True
14. 14.🫗 Is filtered pond water safe to drink? (a) no, germs may stay (b) yes, if it is clear (c) yes, if it is cold (d) yes, always
15. 15.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
16. 16.🔮 Predict: you stop shaking after only one minute. What do you have? (a) cheese (b) still runny cream (c) butter lumps (d) ghee
17. 17.True or false: a jar with a tight lid is needed for making butter. (a) False (b) True
18. 18.🫗 How do we separate sugar from sugar water? (a) winnowing (b) sieving (c) handpicking (d) evaporating
19. 19.🔍 Which is the odd one out? (a) cooking an egg (b) rusting iron (c) melting butter (d) milk turning to curd
20. 20.🔍 Which is the odd one out? (a) detergent water (b) tamarind water (c) soap solution (d) baking soda water
21. 21.True or false: fresh cream is not needed for making butter. (a) True (b) False
22. 22.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
23. 23.True or false: putting the iron away is a job for an adult. (a) False (b) True
24. 24.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we change it (b) we keep it the same (c) we measure it
25. 25.🪴 Which part of a plant does this job: take in water from soil? (a) flower (b) leaves (c) stem (d) roots
26. 26.🧺 Do we need a battery cell for sprouting seeds? (a) not needed (b) needed
27. 27.True or false: yeast is not needed for the leafy bag test. (a) True (b) False
28. 28.True or false: time is something yeast needs. (a) False (b) True
29. 29.🪴 Which of these is a job of the roots? (a) take in water from soil (b) hold up the leaves (c) make food in sunlight (d) carry water upward
30. 30.True or false: wet seeds in the dark does not sprout. (a) False (b) True
31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
32. 32.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) a magnet (c) white paper strips (d) lemon juice
33. 33.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) an adult with an iron (b) white paper (c) a balloon (d) a cotton bud
34. 34.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is the one thing we change. (a) True (b) False
35. 35.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “how hard we shake”? (a) we change it (b) we keep it the same (c) we measure it
36. 36.🧺 Which of these is not needed for making butter? (a) a timer (b) a jar with a tight lid (c) yeast (d) fresh cream
37. 37.True or false: give out water vapour is a job of the flower. (a) False (b) True
38. 38.🫧 Is baking soda water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
39. 39.⚖️ Fair test — do seeds need water to sprout? True or false: the same bowls is kept the same. (a) True (b) False
40. 40.📘 What do we call a seed starting to grow? (a) condensation (b) pollination (c) evaporation (d) germination

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