Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 711 · 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 — does cold cream turn into butter faster than warm cream? True or false: time to make butter is what we measure. (a) False (b) True
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) sunny or shady place (c) the same dish
3. 3.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we measure it (b) we keep it the same (c) we change it
5. 5.🍋 Why does the lemon writing turn brown with heat? (a) the iron is brown (b) paper turns lemony (c) the juice scorches first (d) heat adds colour
6. 6.🍋 Secret message: who does this step — dipping the cotton bud? (a) an adult does it (b) a child can do it
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the kind of salt (b) days to see crystals (c) the amount of water (d) the same dish
8. 8.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) blue (b) dark green (c) bright red (d) pale yellow
9. 9.True or false: a dropper or spoon is not needed for the turmeric test. (a) True (b) False
10. 10.🪴 Which of these is a job of the flower? (a) hold up the leaves (b) carry water upward (c) make seeds (d) take in water from soil
11. 11.🧂 Which of these does not dissolve in water? (a) chalk powder (b) table salt (c) glucose powder (d) sugar
12. 12.🍋 Secret message: who does this step — cutting the lemon? (a) a child can do it (b) an adult does it
13. 13.🌱 Which of these is needed for a seed to sprout? (a) soil (b) sugar (c) sunlight (d) warmth
14. 14.🧺 Which of these is not needed for the leafy bag test? (a) a rubber band (b) a few hours (c) vinegar (d) a clear plastic bag
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) False (b) True
16. 16.True or false: yeast is not needed for the muddy water filter. (a) False (b) True
17. 17.True or false: writing the message is a job for an adult. (a) True (b) False
18. 18.🍞 Which of these is something yeast does not need? (a) warm water (b) a magnet (c) time (d) sugar
19. 19.🪴 Which of these is a job of the roots? (a) make seeds (b) give out water vapour (c) hold up the leaves (d) take in water from soil
20. 20.True or false: melting ice is a change that cannot be undone. (a) False (b) True
21. 21.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
22. 22.🫧 Which of these is a base? (a) vinegar (b) orange juice (c) plain water (d) baking soda water
23. 23.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns red (c) it turns black (d) it turns blue
24. 24.True or false: soap solution is a base. (a) True (b) False
25. 25.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
26. 26.True or false: baking a cake is a change that cannot be undone. (a) True (b) False
27. 27.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
28. 28.True or false: sunlight is something yeast does not need. (a) False (b) True
29. 29.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) vinegar
30. 30.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) warm water (c) a battery cell (d) a comb
31. 31.🔍 Which is the odd one out? (a) rusting iron (b) folding paper (c) freezing water (d) dissolving salt
32. 32.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is what we measure. (a) False (b) True
33. 33.True or false: tea leaves from tea is done by sieving. (a) True (b) False
34. 34.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) freezing water (c) milk turning to curd (d) rusting iron
35. 35.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) the amount poured (b) how clear the water is (c) the same funnel (d) the filter material
36. 36.True or false: vinegar is needed for the leafy bag test. (a) False (b) True
37. 37.🧺 Which of these is not needed for the leafy bag test? (a) a few hours (b) a mirror (c) a potted plant (d) sunlight
38. 38.🧂 Which of these dissolves in water? (a) food colour (b) chalk powder (c) small pebbles (d) sand
39. 39.⚖️ Fair test — do seeds need water to sprout? True or false: the same place is what we measure. (a) False (b) True
40. 40.🎈 Why does the balloon blow up? (a) the bottle shrinks (b) outside air gets in (c) gas is made inside (d) vinegar is hot

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