Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 792 · 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 not needed for making butter? (a) fresh cream (b) a jar with a tight lid (c) a mirror (d) a timer
2. 2.🧺 Which of these is not needed for the fizzy balloon? (a) a balloon (b) a funnel or spoon (c) an empty bottle (d) a mirror
3. 3.🫗 Why does filtered muddy water look clearer? (a) the water evaporates (b) the filter traps mud (c) the mud dissolves (d) the filter adds soap
4. 4.🌱 Why do the seeds on dry cotton not sprout? (a) they have no salt (b) they are too wet (c) they have no water (d) they have no soil
5. 5.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) lemon juice (b) a cotton bud (c) a small bowl (d) a magnet
6. 6.🔍 Which is the odd one out? (a) melting ice (b) rusting iron (c) freezing water (d) folding paper
7. 7.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) plain water (c) detergent water (d) soap solution
8. 8.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) turmeric powder (c) a dropper or spoon (d) yeast
9. 9.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) an adult with an iron (c) a cotton bud (d) turmeric powder
10. 10.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the amount of vinegar is kept the same. (a) True (b) False
11. 11.True or false: small stones from dal is done by handpicking. (a) True (b) False
12. 12.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: size of the balloon is kept the same. (a) True (b) False
13. 13.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
14. 14.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) bigger crystals (c) smaller crystals (d) liquid crystals
15. 15.🫧 Is vinegar an acid, a base or neutral? (a) a base (b) an acid (c) neutral
16. 16.🪴 Which of these is a job of the leaves? (a) hold up the leaves (b) give out water vapour (c) hold the plant in soil (d) carry water upward
17. 17.🌱 Which of these sprouts in a few days? (a) boiled seeds (b) seeds on dry cotton (c) seeds on wet cotton (d) seeds in the freezer
18. 18.🛟 How should the plastic bag be tied around the branch? (a) with sharp wire (b) gently, not too tight (c) with a hot glue gun (d) as tight as possible
19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) True (b) False
20. 20.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is the one thing we change? (a) the amount of yeast (b) the amount of sugar (c) the water temperature (d) the amount of water
21. 21.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a spoon (c) warm water (d) a magnet
22. 22.🫗 How do we separate husk from rice grain? (a) evaporating (b) sieving (c) handpicking (d) winnowing
23. 23.🫧 Is curd an acid, a base or neutral? (a) an acid (b) neutral (c) a base
24. 24.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we measure it (b) we change it (c) we keep it the same
25. 25.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
26. 26.True or false: bad grains from rice is done by handpicking. (a) False (b) True
27. 27.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: amount of water drops is kept the same. (a) True (b) False
28. 28.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a timer (b) yeast (c) fresh cream (d) a bowl
29. 29.🧺 Do we need a mirror for making butter? (a) not needed (b) needed
30. 30.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) a battery cell (d) a balloon
31. 31.🧺 Do we need yeast for the leafy bag test? (a) not needed (b) needed
32. 32.⚖️ 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
33. 33.True or false: dipping the cotton bud is a job for an adult. (a) False (b) True
34. 34.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
35. 35.🌱 Will these sprout: wet seeds by a window? (a) does not sprout (b) sprouts
36. 36.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) next to the baby (c) safe from small children (d) on the edge of a table
37. 37.🧈 Which tool is used in many Indian homes to churn curd into butter? (a) a sieve (b) a mathani (churner) (c) a pressure cooker (d) a rolling pin
38. 38.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it bursts at once (c) it turns yellow (d) it grows much faster
39. 39.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) it turns blue (b) more butter forms (c) it turns to cheese (d) no butter forms
40. 40.True or false: sugar water keeps turmeric yellow. (a) True (b) False

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