Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 25 · 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.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap water is a base (c) soap is an acid (d) soap is magnetic
2. 2.🔮 Predict: you use plain water instead of vinegar. What happens? (a) it turns to honey (b) very little fizzing (c) the balloon bursts (d) a huge eruption
3. 3.🧺 Which of these is not needed for sprouting seeds? (a) a small bowl (b) moong seeds (c) a few days (d) a battery cell
4. 4.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) a magnet (c) lemon juice (d) water
5. 5.True or false: letting the paper dry is a job for an adult. (a) True (b) False
6. 6.🧺 Do we need fresh cream for making butter? (a) needed (b) not needed
7. 7.True or false: a battery cell is not needed for the yeast balloon. (a) True (b) False
8. 8.True or false: yeast is needed for the secret lemon message. (a) False (b) True
9. 9.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a potted plant (b) a clear plastic bag (c) a mirror (d) a rubber band
10. 10.🔮 Predict: the jar is filled right to the top with cream. What happens? (a) it is much faster (b) it makes salt (c) it turns pink (d) it takes much longer
11. 11.🧺 Which of these is needed for the secret lemon message? (a) a mirror (b) a magnet (c) an adult with an iron (d) turmeric powder
12. 12.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) salty (b) clearer (c) muddier (d) hot
13. 13.🧺 Do we need a battery cell for the leafy bag test? (a) not needed (b) needed
14. 14.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) vinegar (d) baking soda water
15. 15.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
16. 16.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the amount of cream”? (a) we change it (b) we measure it (c) we keep it the same
17. 17.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a dropper or spoon (c) lemon juice (d) a magnet
18. 18.🛟 What should you do if vinegar splashes in your eye? (a) rub it hard (b) add baking soda (c) rinse with clean water (d) ignore it
19. 19.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
20. 20.🫧 Which of these is neutral? (a) soap solution (b) detergent water (c) curd (d) salt water
21. 21.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) keep it for a month (c) put it in your mouth (d) pour it down the sink
22. 22.🫗 Which of these is done by evaporating? (a) small stones from dal (b) bran from wheat flour (c) sugar from sugar water (d) mud from water
23. 23.True or false: chaff from wheat grain is done by filtering. (a) True (b) False
24. 24.🫧 Which of these is an acid? (a) soap solution (b) plain water (c) baking soda water (d) lemon juice
25. 25.True or false: a battery cell is needed for making butter. (a) True (b) False
26. 26.🧺 Which of these is needed for the muddy water filter? (a) yeast (b) a funnel (c) a magnet (d) a balloon
27. 27.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is kept the same. (a) False (b) True
28. 28.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: how hard we shake is the one thing we change. (a) False (b) True
29. 29.True or false: a magnet is needed for the leafy bag test. (a) True (b) False
30. 30.🛟 Which safety rule fits the fizzy balloon experiment? (a) put it in your mouth (b) seal it in a glass jar (c) keep it away from eyes (d) shake it near your face
31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we change it (b) we measure it (c) we keep it the same
32. 32.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) time to make butter (b) the cream temperature (c) how hard we shake
33. 33.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a jar with a tight lid (b) a balloon (c) a timer (d) fresh cream
34. 34.🧺 Which of these is needed for sprouting seeds? (a) turmeric powder (b) yeast (c) a magnet (d) a small bowl
35. 35.🌱 Which of these sprouts in a few days? (a) seeds in the freezer (b) boiled seeds (c) seeds on wet cotton (d) seeds on dry cotton
36. 36.🧺 Do we need a mirror for the fizzy balloon? (a) needed (b) not needed
37. 37.🧺 Which of these is needed for the secret lemon message? (a) a balloon (b) a magnet (c) turmeric powder (d) white paper
38. 38.True or false: baking soda dissolves in water. (a) False (b) True
39. 39.True or false: detergent water is an acid. (a) True (b) False
40. 40.🫧 Which of these is an acid? (a) sugar water (b) vinegar (c) salt water (d) plain water

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