Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 691 · 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 an acid? (a) sugar water (b) salt water (c) tamarind water (d) soap solution
2. 2.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) both stay behind (b) tea stays behind (c) leaves stay behind (d) leaves pass through
3. 3.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) neutral (c) an acid
4. 4.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) green (c) reddish-brown (d) it stays white
5. 5.True or false: a potted plant is not needed for the leafy bag test. (a) False (b) True
6. 6.🧺 Which of these is not needed for the secret lemon message? (a) a small bowl (b) a cotton bud (c) an adult with an iron (d) yeast
7. 7.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) the same bottle (b) spoons of baking soda (c) size of the balloon (d) the amount of vinegar
8. 8.⚖️ Fair test — do seeds need water to sprout? True or false: the number of seeds is kept the same. (a) False (b) True
9. 9.🔮 Predict: you use plain water instead of vinegar. What happens? (a) it turns to honey (b) the balloon bursts (c) very little fizzing (d) a huge eruption
10. 10.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we change it (b) we keep it the same (c) we measure it
11. 11.🛟 Which safety rule fits the fizzy balloon experiment? (a) seal it in a glass jar (b) put it in your mouth (c) keep it away from eyes (d) shake it near your face
12. 12.True or false: soap solution keeps turmeric yellow. (a) True (b) False
13. 13.True or false: curd is an acid. (a) True (b) False
14. 14.📘 What do we call plants giving out water vapour from their leaves? (a) transpiration (b) digestion (c) germination (d) reflection
15. 15.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
16. 16.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) salt water (c) plain water (d) detergent water
17. 17.🌱 Is salt needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
18. 18.🛟 Why must a plastic bag never go over anyone’s head? (a) it changes colour (b) it gets wet (c) it can block breathing (d) it is too big
19. 19.True or false: salt from sea water is done by evaporating. (a) True (b) False
20. 20.🧈 Which of these is a change that can be undone? (a) rusting iron (b) melting butter (c) cooking an egg (d) baking a cake
21. 21.🌱 Which of these sprouts in a few days? (a) wet seeds in the dark (b) boiled seeds (c) seeds on dry cotton (d) seeds in the freezer
22. 22.🧺 Which of these is not needed for the leafy bag test? (a) a battery cell (b) a clear plastic bag (c) a potted plant (d) sunlight
23. 23.True or false: white paper is not needed for the secret lemon message. (a) True (b) False
24. 24.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
25. 25.⚖️ 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
26. 26.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a tray for spills (b) a comb (c) a funnel or spoon (d) baking soda
27. 27.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the water temperature (b) the amount of yeast (c) the same bottles (d) size of the balloon
28. 28.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is kept the same. (a) False (b) True
29. 29.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) throw them at friends (b) never put seeds in mouth (c) feed them to pets (d) eat a few to check
30. 30.🔍 Which is the odd one out? (a) water (b) warmth (c) air (d) sunlight
31. 31.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same funnel is kept the same. (a) True (b) False
32. 32.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the iron setting is the one thing we change. (a) False (b) True
33. 33.🧺 Which of these is needed for the leafy bag test? (a) yeast (b) a magnet (c) sunlight (d) a mirror
34. 34.🌱 Will these sprout: seeds on dry cotton? (a) does not sprout (b) sprouts
35. 35.🧺 Do we need a balloon for the secret lemon message? (a) not needed (b) needed
36. 36.🧺 Do we need a balloon for making butter? (a) not needed (b) needed
37. 37.True or false: wet seeds by a window sprouts in a few days. (a) False (b) True
38. 38.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) the same bowls (b) how many seeds sprout (c) wet or dry cotton
39. 39.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
40. 40.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: size of the balloon is the one thing we change. (a) True (b) False

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