Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 752 · 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 a paper clip for the yeast balloon? (a) needed (b) not needed
2. 2.True or false: bad grains from rice is done by sieving. (a) False (b) True
3. 3.🧺 Which of these is not needed for the leafy bag test? (a) a rubber band (b) a clear plastic bag (c) turmeric powder (d) a few hours
4. 4.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) crystals grow faster (d) few or no crystals
5. 5.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the kind of juice”? (a) we change it (b) we keep it the same (c) we measure it
6. 6.True or false: a few days is needed for sprouting seeds. (a) False (b) True
7. 7.🔍 Which is the odd one out? (a) salt (b) soil (c) air (d) sugar
8. 8.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
9. 9.True or false: a mirror is needed for the leafy bag test. (a) False (b) True
10. 10.🎈 Why does the balloon blow up? (a) gas is made inside (b) vinegar is hot (c) the bottle shrinks (d) outside air gets in
11. 11.🧺 Which of these is needed for the secret lemon message? (a) a balloon (b) a battery cell (c) a cotton bud (d) turmeric powder
12. 12.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the same jar is what we measure. (a) True (b) False
13. 13.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) reddish-brown (c) it turns green (d) it turns blue
14. 14.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) fresh cream (b) a timer (c) turmeric powder (d) a jar with a tight lid
15. 15.True or false: detergent water is neutral. (a) False (b) True
16. 16.🛟 Who should use the hot iron in the secret message experiment? (a) whoever is fastest (b) any child (c) the youngest child (d) only an adult
17. 17.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) a small bottle (c) warm water (d) sugar
18. 18.True or false: a tray for spills is not needed for the fizzy balloon. (a) False (b) True
19. 19.🫗 Which of these is done by evaporating? (a) bad grains from rice (b) chaff from wheat grain (c) mud from water (d) salt from sea water
20. 20.True or false: a potted plant is needed for the leafy bag test. (a) True (b) False
21. 21.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the kind of juice (b) the iron setting (c) how dark the writing is
22. 22.🧺 Do we need an adult with an iron for the secret lemon message? (a) not needed (b) needed
23. 23.⚖️ 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 change it (c) we measure it
24. 24.🔍 Which is the odd one out? (a) reading the message (b) plugging in the iron (c) letting the paper dry (d) writing the message
25. 25.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is kept the same. (a) False (b) True
26. 26.🛟 What should you do after touching soil or seeds? (a) skip washing (b) rub your eyes (c) wash your hands (d) lick your fingers
27. 27.🌱 Which of these does not sprout? (a) wet seeds by a window (b) wet seeds in the dark (c) seeds on wet cotton (d) seeds in the freezer
28. 28.🧺 Which of these is not needed for sprouting seeds? (a) a battery cell (b) moong seeds (c) water (d) cotton wool
29. 29.📘 The browning of lemon juice with heat is a ___ change. (a) physical (b) magnetic (c) chemical (d) musical
30. 30.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the amount poured is kept the same. (a) True (b) False
31. 31.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the size of the plant”? (a) we keep it the same (b) we measure it (c) we change it
32. 32.True or false: yeast is not needed for the secret lemon message. (a) False (b) True
33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) False (b) True
34. 34.True or false: lemon juice is not needed for the turmeric test. (a) True (b) False
35. 35.True or false: mud from water is done by sieving. (a) False (b) True
36. 36.🫗 Which of these is done by evaporating? (a) tea leaves from tea (b) mud from water (c) sugar from sugar water (d) husk from rice grain
37. 37.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) blue words (b) dark brown words (c) a rainbow (d) almost nothing
38. 38.🧺 Which of these is needed for making butter? (a) yeast (b) a magnet (c) a balloon (d) a jar with a tight lid
39. 39.True or false: turmeric powder is not needed for the turmeric test. (a) False (b) True
40. 40.True or false: a battery cell is not needed for the secret lemon message. (a) True (b) False

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