Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 965 · 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 turns turmeric reddish-brown? (a) plain water (b) baking soda water (c) tamarind water (d) sugar water
2. 2.🧺 Which of these is needed for making butter? (a) a magnet (b) a mirror (c) cold water to rinse (d) yeast
3. 3.🔍 Which is the odd one out? (a) letting the paper dry (b) plugging in the iron (c) dipping the cotton bud (d) reading the message
4. 4.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they grow fruit (b) they glow (c) they do not sprout (d) they sprout faster
5. 5.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
6. 6.True or false: orange juice is a base. (a) True (b) False
7. 7.🛟 Which safety rule fits the fizzy balloon experiment? (a) seal it in a glass jar (b) keep it away from eyes (c) put it in your mouth (d) shake it near your face
8. 8.🧺 Which of these is needed for the fizzy balloon? (a) a seed (b) sugar (c) a tray for spills (d) a magnet
9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
10. 10.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
11. 11.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is kept the same. (a) True (b) False
12. 12.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) how many seeds sprout (b) the kind of seeds (c) wet or dry cotton
13. 13.⚖️ 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) False (b) True
14. 14.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is what we measure. (a) False (b) True
15. 15.True or false: a balloon is not needed for the muddy water filter. (a) False (b) True
16. 16.True or false: a magnet is not needed for the secret lemon message. (a) True (b) False
17. 17.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) a seed (c) an empty bottle (d) a balloon
18. 18.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we keep it the same (b) we change it (c) we measure it
19. 19.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
20. 20.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we keep it the same (b) we measure it (c) we change it
21. 21.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) turmeric powder (b) a bowl (c) fresh cream (d) cold water to rinse
22. 22.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a battery cell (b) soap solution (c) turmeric powder (d) lemon juice
23. 23.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same muddy water”? (a) we keep it the same (b) we measure it (c) we change it
24. 24.🫧 Is orange juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
25. 25.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a comb (c) sugar (d) dry yeast
26. 26.🌱 Will these sprout: wet seeds in the dark? (a) does not sprout (b) sprouts
27. 27.🧈 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
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) the kind of salt (c) sunny or shady place
29. 29.🧺 Do we need a magnet for the muddy water filter? (a) not needed (b) needed
30. 30.True or false: seeds in the freezer sprouts in a few days. (a) True (b) False
31. 31.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the same bottle”? (a) we change it (b) we measure it (c) we keep it the same
32. 32.True or false: make food in sunlight is a job of the flower. (a) True (b) False
33. 33.⚖️ Fair test — do seeds need water to sprout? True or false: the kind of seeds is the one thing we change. (a) False (b) True
34. 34.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is kept the same. (a) False (b) True
35. 35.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) True (b) False
36. 36.🌱 Is air needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
37. 37.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is kept the same. (a) True (b) False
38. 38.🫗 How do we separate bad grains from rice? (a) handpicking (b) evaporating (c) filtering (d) winnowing
39. 39.⚖️ 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 change it (c) we measure it
40. 40.🌱 Where does a sprouting seed get its first food from? (a) the cotton wool (b) food stored in the seed (c) the air (d) the sunlight only

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