Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 977 · 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 turns turmeric reddish-brown. (a) False (b) True
2. 2.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it turns yellow (c) it bursts at once (d) it grows much faster
3. 3.🛟 What should you do after handling muddy water? (a) wipe hands on face (b) lick your fingers (c) nothing is needed (d) wash hands afterwards
4. 4.🛟 What should you do after touching soil or seeds? (a) rub your eyes (b) wash your hands (c) skip washing (d) lick your fingers
5. 5.True or false: a balloon is not needed for the fizzy balloon. (a) True (b) False
6. 6.True or false: cooking oil dissolves in water. (a) True (b) False
7. 7.🔮 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
8. 8.🌱 Which of these does not sprout? (a) seeds on wet cotton (b) seeds in the freezer (c) wet seeds by a window (d) wet seeds in the dark
9. 9.True or false: salt water turns turmeric reddish-brown. (a) False (b) True
10. 10.True or false: seeds on dry cotton sprouts in a few days. (a) False (b) True
11. 11.True or false: yeast is not needed for making butter. (a) False (b) True
12. 12.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) neutral (c) a base
13. 13.True or false: yeast is needed for the muddy water filter. (a) True (b) False
14. 14.🟡 Which of these turns turmeric paper reddish-brown? (a) lemon juice (b) sugar water (c) soap solution (d) vinegar
15. 15.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we keep it the same (b) we measure it (c) we change it
16. 16.🫗 Why does filtered muddy water look clearer? (a) the mud dissolves (b) the filter adds soap (c) the water evaporates (d) the filter traps mud
17. 17.🛟 Who should use the hot iron in the secret message experiment? (a) any child (b) whoever is fastest (c) only an adult (d) the youngest child
18. 18.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the time we wait is the one thing we change. (a) False (b) True
19. 19.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
20. 20.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the amount of vinegar (b) the kind of balloon (c) size of the balloon (d) spoons of baking soda
21. 21.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we keep it the same (b) we measure it (c) we change it
22. 22.True or false: soap solution keeps turmeric yellow. (a) True (b) False
23. 23.True or false: dissolving salt is a change that can be undone. (a) True (b) False
24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we measure it (c) we change it
25. 25.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) a tray for spills (c) a seed (d) vinegar
26. 26.🛟 Which safety rule fits the fizzy balloon experiment? (a) keep it away from eyes (b) seal it in a glass jar (c) shake it near your face (d) put it in your mouth
27. 27.🍋 What colour does the lemon writing turn when an adult warms it? (a) brown (b) green (c) white (d) blue
28. 28.🔍 Which is the odd one out? (a) time (b) a magnet (c) salt (d) sunlight
29. 29.🛟 The water for the yeast should be ___. (a) warm, not hot (b) ice cold (c) boiling hot (d) very salty
30. 30.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we measure it (b) we change it (c) we keep it the same
31. 31.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) an empty bottle (c) a comb (d) a balloon
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a spoon (c) salt (d) warm water
33. 33.🛟 What should you do if vinegar splashes in your eye? (a) rub it hard (b) rinse with clean water (c) add baking soda (d) ignore it
34. 34.⚖️ 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
35. 35.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) mix bathroom cleaners (c) sip each liquid (d) sniff each bottle hard
36. 36.⚖️ Fair test — do seeds need water to sprout? True or false: how many seeds sprout is kept the same. (a) False (b) True
37. 37.🧈 Which tool is used in many Indian homes to churn curd into butter? (a) a sieve (b) a rolling pin (c) a mathani (churner) (d) a pressure cooker
38. 38.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
39. 39.True or false: melting ice is a change that can be undone. (a) True (b) False
40. 40.True or false: time is something yeast does not need. (a) True (b) False

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