Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 912 · 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.📘 What do we call a seed starting to grow? (a) evaporation (b) pollination (c) condensation (d) germination
2. 2.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
3. 3.🧺 Do we need a battery cell for the muddy water filter? (a) not needed (b) needed
4. 4.🌱 Which of these sprouts in a few days? (a) boiled seeds (b) wet seeds in the dark (c) seeds in the freezer (d) seeds on dry cotton
5. 5.🔍 Which is the odd one out? (a) cooking an egg (b) freezing water (c) baking a cake (d) rusting iron
6. 6.🫗 Which of these is done by sieving? (a) husk from rice grain (b) sugar from sugar water (c) chaff from wheat grain (d) bran from wheat flour
7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
8. 8.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a timer (b) a battery cell (c) cold water to rinse (d) fresh cream
9. 9.True or false: a potted plant is not needed for the leafy bag test. (a) False (b) True
10. 10.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) detergent water (d) plain water
11. 11.🛟 Why must children keep their fingers away from the iron? (a) it is magnetic (b) it is sticky (c) it can burn skin (d) it is cold
12. 12.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a balloon (c) a mirror (d) warm water
13. 13.🫗 How do we separate small stones from dal? (a) evaporating (b) winnowing (c) handpicking (d) sieving
14. 14.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) a base (c) an acid
15. 15.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) yeast (c) an adult with an iron (d) lemon juice
16. 16.🪴 Which part of a plant does this job: take in water from soil? (a) stem (b) roots (c) leaves (d) flower
17. 17.True or false: orange juice is an acid. (a) False (b) True
18. 18.🧺 Which of these is not needed for the leafy bag test? (a) sunlight (b) a mirror (c) a rubber band (d) a potted plant
19. 19.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
20. 20.🔮 Predict: the adult irons for only one second. What happens? (a) writing turns green (b) it gets darker (c) the paper floats (d) writing stays faint
21. 21.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same cotton bud is the one thing we change. (a) False (b) True
22. 22.🔮 The fizzing stops after a while. Why? (a) the balloon got cold (b) the bottle got tired (c) an ingredient ran out (d) the gas froze
23. 23.🧺 Do we need an empty bottle for the fizzy balloon? (a) not needed (b) needed
24. 24.🧺 Which of these is needed for the turmeric test? (a) water (b) a mirror (c) a comb (d) a balloon
25. 25.🍋 Secret message: who does this step — cutting the lemon? (a) a child can do it (b) an adult does it
26. 26.True or false: curd is an acid. (a) True (b) False
27. 27.🧺 Which of these is needed for the yeast balloon? (a) dry yeast (b) a paper clip (c) a magnet (d) a mirror
28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we change it (c) we measure it
29. 29.🧺 Do we need a balloon for the fizzy balloon? (a) not needed (b) needed
30. 30.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “how hard we shake”? (a) we keep it the same (b) we measure it (c) we change it
31. 31.🫧 Which of these is a base? (a) lemon juice (b) baking soda water (c) curd (d) vinegar
32. 32.True or false: wet seeds in the dark does not sprout. (a) True (b) False
33. 33.🛟 What should you do after handling muddy water? (a) wash hands afterwards (b) nothing is needed (c) wipe hands on face (d) lick your fingers
34. 34.🔍 Which is the odd one out? (a) sunlight (b) salt (c) vinegar (d) sugar
35. 35.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
36. 36.⚖️ Fair test — do seeds need water to sprout? What do we do with “wet or dry cotton”? (a) we change it (b) we keep it the same (c) we measure it
37. 37.True or false: bad grains from rice is done by sieving. (a) True (b) False
38. 38.⚖️ 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 keep it the same (b) we change it (c) we measure it
39. 39.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
40. 40.🔍 Which is the odd one out? (a) food colour (b) table salt (c) sugar (d) cooking oil

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