Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 676 · 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.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the turmeric paper (b) the liquid we test (c) the number of drops (d) the colour we see
2. 2.🍋 Why does the lemon writing turn brown with heat? (a) the juice scorches first (b) paper turns lemony (c) heat adds colour (d) the iron is brown
3. 3.True or false: air is not needed for a seed to sprout. (a) True (b) False
4. 4.True or false: a timer is needed for making butter. (a) False (b) True
5. 5.🔍 Which is the odd one out? (a) vinegar (b) soap solution (c) detergent water (d) baking soda water
6. 6.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) the cream temperature (b) time to make butter (c) the amount of cream
7. 7.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same cotton bud is kept the same. (a) True (b) False
8. 8.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same muddy water”? (a) we measure it (b) we keep it the same (c) we change it
9. 9.🔍 Which is the odd one out? (a) soap solution (b) salt water (c) baking soda water (d) detergent water
10. 10.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) warm water (c) a shallow dish (d) a battery cell
11. 11.🛟 Why must the jar lid be screwed on tightly? (a) so air gets out (b) so it turns yellow (c) so cream does not spill (d) so it gets hot
12. 12.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
13. 13.🧺 Do we need white paper for the secret lemon message? (a) not needed (b) needed
14. 14.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) baking soda water (d) sugar water
15. 15.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: how clear the water is is the one thing we change. (a) True (b) False
16. 16.🔍 Which is the odd one out? (a) salt water (b) sugar water (c) plain water (d) soap solution
17. 17.🌱 Which of these does not sprout? (a) seeds on wet cotton (b) wet seeds in the dark (c) wet seeds by a window (d) seeds in the freezer
18. 18.⚖️ 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 keep it the same (c) we measure it
19. 19.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) an adult with an iron (b) white paper (c) a cotton bud (d) a mirror
20. 20.True or false: a clear plastic bag is not needed for the leafy bag test. (a) False (b) True
21. 21.🍞 Which of these is something yeast needs? (a) sunlight (b) vinegar (c) warm water (d) salt
22. 22.🫗 Which of these is done by handpicking? (a) salt from sea water (b) bad grains from rice (c) gravel from fine sand (d) bran from wheat flour
23. 23.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
24. 24.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the kind of juice”? (a) we measure it (b) we keep it the same (c) we change it
25. 25.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a mirror (b) water (c) white paper strips (d) turmeric powder
26. 26.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
27. 27.🧺 Do we need sugar for the fizzy balloon? (a) not needed (b) needed
28. 28.🛟 Why must children keep their fingers away from the iron? (a) it is sticky (b) it can burn skin (c) it is cold (d) it is magnetic
29. 29.True or false: mud from water is done by sieving. (a) False (b) True
30. 30.🛟 Why must a plastic bag never go over anyone’s head? (a) it gets wet (b) it changes colour (c) it is too big (d) it can block breathing
31. 31.🔍 Which is the odd one out? (a) plain water (b) baking soda water (c) detergent water (d) soap solution
32. 32.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) salt (c) a battery cell (d) a mirror
33. 33.🧺 Which of these is not needed for the secret lemon message? (a) a battery cell (b) an adult with an iron (c) white paper (d) a small bowl
34. 34.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) a battery cell (c) a balloon (d) baking soda
35. 35.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) it turns to sand (b) yes, all of it (c) it turns to sugar (d) no, salt passes through
36. 36.🫗 Which of these is done by winnowing? (a) husk from rice grain (b) mud from water (c) small stones from dal (d) tea leaves from tea
37. 37.🪴 Which part of a plant does this job: give out water vapour? (a) roots (b) stem (c) flower (d) leaves
38. 38.True or false: a paper clip is not needed for the yeast balloon. (a) False (b) True
39. 39.🧺 Which of these is not needed for the leafy bag test? (a) turmeric powder (b) a potted plant (c) a few hours (d) a rubber band
40. 40.True or false: a magnet is not needed for the leafy bag test. (a) False (b) True

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