Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 392 · 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: lemon juice is needed for the secret lemon message. (a) False (b) True
2. 2.🛟 Which safety rule fits the fizzy balloon experiment? (a) keep it away from eyes (b) seal it in a glass jar (c) put it in your mouth (d) shake it near your face
3. 3.True or false: a magnet is something yeast does not need. (a) False (b) True
4. 4.🛟 Why is a plastic jar a good choice for shaking? (a) it is heavier (b) it is hotter (c) it will not break (d) it is magnetic
5. 5.🧺 Do we need a battery cell for the secret lemon message? (a) needed (b) not needed
6. 6.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it floats on top (b) it dissolves (c) it sinks to the bottom (d) it turns to sand
7. 7.🔮 Predict: you use plain water instead of vinegar. What happens? (a) it turns to honey (b) a huge eruption (c) the balloon bursts (d) very little fizzing
8. 8.True or false: tamarind water keeps turmeric yellow. (a) True (b) False
9. 9.🛟 The water for the yeast should be ___. (a) ice cold (b) very salty (c) boiling hot (d) warm, not hot
10. 10.🫧 Is baking soda water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
11. 11.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a battery cell (c) sugar (d) a mirror
12. 12.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) lemon juice (b) turmeric powder (c) an adult with an iron (d) white paper
13. 13.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
14. 14.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the same paper (b) the iron setting (c) how dark the writing is (d) the kind of juice
15. 15.True or false: a funnel or spoon is needed for the fizzy balloon. (a) False (b) True
16. 16.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the mud (b) the water (c) nothing (d) the salt
17. 17.🧺 Which of these is not needed for the secret lemon message? (a) a magnet (b) lemon juice (c) an adult with an iron (d) white paper
18. 18.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) the same jar (b) time to make butter (c) how hard we shake (d) the cream temperature
19. 19.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) hot (b) salty (c) muddier (d) clearer
20. 20.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
21. 21.🧺 Do we need a cotton bud for the secret lemon message? (a) needed (b) not needed
22. 22.🍋 Secret message: who does this step — plugging in the iron? (a) a child can do it (b) an adult does it
23. 23.🔍 Which is the odd one out? (a) air (b) water (c) warmth (d) sunlight
24. 24.🌱 Is soil needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
25. 25.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we keep it the same (b) we measure it (c) we change it
26. 26.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) lemon juice (b) a small bowl (c) a mirror (d) a cotton bud
27. 27.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows very little (c) it grows much faster (d) it bursts at once
28. 28.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is the one thing we change. (a) True (b) False
29. 29.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your school uniform (c) an old shirt or apron (d) your best clothes
30. 30.True or false: a clean glass is needed for the muddy water filter. (a) True (b) False
31. 31.True or false: a mirror is not needed for the fizzy balloon. (a) False (b) True
32. 32.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
33. 33.🔍 Which is the odd one out? (a) milk turning to curd (b) melting butter (c) folding paper (d) dissolving salt
34. 34.True or false: soap solution keeps turmeric yellow. (a) True (b) False
35. 35.🫧 Which of these is a base? (a) salt water (b) orange juice (c) soap solution (d) tamarind water
36. 36.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) a magnet (c) a clean glass (d) cotton or cloth
37. 37.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) freezing water (c) melting ice (d) browning lemon ink
38. 38.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a mirror (b) cotton or cloth (c) sand and pebbles (d) muddy water
39. 39.🧺 Which of these is not needed for the fizzy balloon? (a) a funnel or spoon (b) a magnet (c) baking soda (d) a tray for spills
40. 40.🧺 Which of these is not needed for the fizzy balloon? (a) an empty bottle (b) a balloon (c) a tray for spills (d) a comb

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