Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 721 · 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 something yeast does not need? (a) sugar (b) warm water (c) sunlight (d) time
2. 2.🛟 Why must the jar lid be screwed on tightly? (a) so cream does not spill (b) so air gets out (c) so it turns yellow (d) so it gets hot
3. 3.🛟 What should you do after touching soil or seeds? (a) skip washing (b) lick your fingers (c) rub your eyes (d) wash your hands
4. 4.🪴 Which part of a plant does this job: hold up the leaves? (a) stem (b) roots (c) flower (d) leaves
5. 5.🔍 Which is the odd one out? (a) putting the iron away (b) cutting the lemon (c) dipping the cotton bud (d) ironing the paper
6. 6.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False
7. 7.🫧 Which of these is an acid? (a) soap solution (b) salt water (c) orange juice (d) sugar water
8. 8.🔮 Predict: the adult irons for only one second. What happens? (a) writing turns green (b) it gets darker (c) writing stays faint (d) the paper floats
9. 9.🧺 Do we need yeast for the secret lemon message? (a) needed (b) not needed
10. 10.🫗 Why does filtered muddy water look clearer? (a) the water evaporates (b) the filter traps mud (c) the mud dissolves (d) the filter adds soap
11. 11.True or false: vinegar is something yeast does not need. (a) False (b) True
12. 12.🧈 Why does shaking cream make butter? (a) the lid is warm (b) the jar adds butter (c) fat bits stick together (d) shaking adds salt
13. 13.🔍 Which is the odd one out? (a) warm water (b) sugar (c) salt (d) time
14. 14.🔍 Which is the odd one out? (a) sawdust (b) sugar (c) chalk powder (d) sand
15. 15.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “time to make butter”? (a) we measure it (b) we keep it the same (c) we change it
16. 16.🧺 Which of these is needed for the fizzy balloon? (a) a mirror (b) a comb (c) baking soda (d) a seed
17. 17.⚖️ 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
18. 18.🧺 Do we need cold water to rinse for making butter? (a) needed (b) not needed
19. 19.True or false: turmeric powder is needed for the turmeric test. (a) True (b) False
20. 20.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) moong seeds (b) yeast (c) a few days (d) water
21. 21.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) melting butter (c) milk turning to curd (d) rusting iron
22. 22.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they sprout faster (b) they glow (c) they grow fruit (d) they do not sprout
23. 23.True or false: yeast is needed for sprouting seeds. (a) True (b) False
24. 24.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
25. 25.True or false: writing the message is a job a child can do. (a) True (b) False
26. 26.True or false: a timer is not needed for making butter. (a) True (b) False
27. 27.True or false: cooking oil does not dissolve in water. (a) False (b) True
28. 28.True or false: seeds in the freezer sprouts in a few days. (a) False (b) True
29. 29.🧺 Which of these is needed for making butter? (a) turmeric powder (b) cold water to rinse (c) yeast (d) a battery cell
30. 30.🧺 Which of these is not needed for the secret lemon message? (a) a battery cell (b) a cotton bud (c) a small bowl (d) lemon juice
31. 31.🔍 Which is the odd one out? (a) reading the message (b) cutting the lemon (c) letting the paper dry (d) writing the message
32. 32.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) dry yeast (c) a magnet (d) turmeric powder
33. 33.🧺 Which of these is needed for the fizzy balloon? (a) sugar (b) a battery cell (c) a seed (d) vinegar
34. 34.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap is an acid (c) soap water is a base (d) soap is hot
35. 35.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is the one thing we change? (a) size of the balloon (b) the water temperature (c) the amount of yeast (d) the same bottles
36. 36.🧺 Do we need turmeric powder for making butter? (a) not needed (b) needed
37. 37.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) the same bowls (b) how many seeds sprout (c) wet or dry cotton (d) the kind of seeds
38. 38.🫧 Which of these is neutral? (a) vinegar (b) tamarind water (c) plain water (d) soap solution
39. 39.🧺 Which of these is needed for the fizzy balloon? (a) a balloon (b) a comb (c) a mirror (d) a magnet
40. 40.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it disappears (b) it turns darker red (c) it turns yellow again (d) it turns blue

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