Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 960 · 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.🧺 Do we need turmeric powder for the secret lemon message? (a) needed (b) not needed
2. 2.🧈 Which of these is a change that can be undone? (a) melting butter (b) cooking an egg (c) baking a cake (d) rusting iron
3. 3.🧺 Do we need a magnet for sprouting seeds? (a) needed (b) not needed
4. 4.True or false: vinegar keeps turmeric yellow. (a) True (b) False
5. 5.🛟 Why must a plastic bag never go over anyone’s head? (a) it is too big (b) it gets wet (c) it can block breathing (d) it changes colour
6. 6.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it wilts and droops (b) it flowers more (c) it grows faster (d) it turns blue
7. 7.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) how dark the writing is (b) the kind of juice (c) the same cotton bud
8. 8.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the kind of salt (b) sunny or shady place (c) days to see crystals
9. 9.🧈 Before the butter appears, what does the cream turn into? (a) clear water (b) ice (c) powder (d) thick whipped cream
10. 10.True or false: turmeric powder is needed for making butter. (a) True (b) False
11. 11.🫗 Which of these is done by evaporating? (a) salt from sea water (b) bran from wheat flour (c) mud from water (d) gravel from fine sand
12. 12.📘 What is yeast? (a) a kind of salt (b) a kind of stone (c) a kind of sugar (d) a tiny living fungus
13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we measure it (b) we change it (c) we keep it the same
14. 14.🫧 Which of these is a base? (a) curd (b) tamarind water (c) orange juice (d) soap solution
15. 15.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) very salty (d) warm, not hot
16. 16.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a funnel or spoon (b) baking soda (c) a tray for spills (d) a mirror
17. 17.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) sunlight (b) a potted plant (c) vinegar (d) a rubber band
18. 18.True or false: cotton wool is needed for sprouting seeds. (a) True (b) False
19. 19.True or false: ironing the paper is a job a child can do. (a) True (b) False
20. 20.🧺 Do we need a balloon for sprouting seeds? (a) not needed (b) needed
21. 21.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) sugar (c) a comb (d) a mirror
22. 22.🔍 Which is the odd one out? (a) rusting iron (b) browning lemon ink (c) baking a cake (d) dissolving salt
23. 23.True or false: warm water is needed for the yeast balloon. (a) False (b) True
24. 24.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “how clear the water is”? (a) we keep it the same (b) we measure it (c) we change it
25. 25.🧺 Which of these is needed for sprouting seeds? (a) a magnet (b) moong seeds (c) a balloon (d) a mirror
26. 26.🔮 Can the brown writing go back to being invisible? (a) yes, in the dark (b) yes, if shaken (c) yes, if cooled (d) no, it stays brown
27. 27.🔍 Which is the odd one out? (a) detergent water (b) curd (c) orange juice (d) lemon juice
28. 28.⚖️ Fair test — do seeds need water to sprout? True or false: wet or dry cotton is the one thing we change. (a) False (b) True
29. 29.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) vinegar (d) time
30. 30.True or false: a tray for spills is not needed for the fizzy balloon. (a) False (b) True
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) a mirror (d) a spoon
32. 32.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) the filter material (b) how clear the water is (c) the same funnel
33. 33.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) throw them at friends (b) feed them to pets (c) never put seeds in mouth (d) eat a few to check
34. 34.⚖️ 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
35. 35.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a small bottle (c) dry yeast (d) a battery cell
36. 36.🫧 Is salt water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
37. 37.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) baking soda water (d) lemon juice
38. 38.🪴 Which of these is a job of the roots? (a) make seeds (b) give out water vapour (c) take in water from soil (d) carry water upward
39. 39.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is kept the same? (a) amount of water drops (b) sun or shade (c) the kind of plant
40. 40.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) the filter material (b) how clear the water is (c) the amount poured

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