Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 220 · 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 neutral? (a) baking soda water (b) plain water (c) lemon juice (d) tamarind water
2. 2.🔍 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
3. 3.🛟 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
4. 4.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) baking a cake (c) freezing water (d) melting butter
5. 5.True or false: hold up the leaves is a job of the roots. (a) True (b) False
6. 6.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) a rubber band (c) a few hours (d) a mirror
7. 7.True or false: hold the plant in soil is a job of the leaves. (a) True (b) False
8. 8.True or false: baking soda water is an acid. (a) False (b) True
9. 9.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
10. 10.True or false: rusting iron is a change that can be undone. (a) True (b) False
11. 11.🔍 Which is the odd one out? (a) soap solution (b) plain water (c) salt water (d) sugar water
12. 12.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) turmeric powder (d) warm water
13. 13.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) lemon juice (c) an adult with an iron (d) a balloon
14. 14.🍋 Which of these steps is a job for an adult? (a) reading the message (b) writing the message (c) letting the paper dry (d) cutting the lemon
15. 15.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
16. 16.True or false: tamarind water keeps turmeric yellow. (a) False (b) True
17. 17.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the time we wait is the one thing we change. (a) False (b) True
18. 18.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the amount of cream is the one thing we change. (a) True (b) False
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we keep it the same (b) we change it (c) we measure it
20. 20.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we keep it the same (c) we change it
22. 22.🔍 Which is the odd one out? (a) detergent water (b) vinegar (c) baking soda water (d) soap solution
23. 23.🔍 Which is the odd one out? (a) lemon juice (b) vinegar (c) sugar water (d) baking soda water
24. 24.🧺 Do we need an adult with an iron for the secret lemon message? (a) not needed (b) needed
25. 25.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) yes, they sprout (b) they turn to stones (c) they melt (d) no, never
26. 26.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a clean glass (b) a mirror (c) muddy water (d) cotton or cloth
27. 27.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it wilts and droops (b) it turns blue (c) it flowers more (d) it grows faster
28. 28.🫧 Which of these is an acid? (a) orange juice (b) baking soda water (c) salt water (d) sugar water
29. 29.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) reddish-brown (c) it stays white (d) bright blue
30. 30.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we change it (b) we measure it (c) we keep it the same
31. 31.True or false: a mirror is needed for making butter. (a) True (b) False
32. 32.True or false: putting the iron away is a job for an adult. (a) False (b) True
33. 33.True or false: bran from wheat flour is done by sieving. (a) True (b) False
34. 34.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we keep it the same (b) we change it (c) we measure it
35. 35.True or false: dipping the cotton bud is a job for an adult. (a) True (b) False
36. 36.True or false: a balloon is needed for sprouting seeds. (a) True (b) False
37. 37.🧺 Do we need a magnet for the turmeric test? (a) needed (b) not needed
38. 38.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the same jar”? (a) we measure it (b) we change it (c) we keep it the same
39. 39.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “how dark the writing is”? (a) we keep it the same (b) we measure it (c) we change it
40. 40.🪴 Which of these is a job of the leaves? (a) hold the plant in soil (b) make seeds (c) carry water upward (d) give out water vapour

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