Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 667 · 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.True or false: tea leaves from tea is done by handpicking. (a) True (b) False
2. 2.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) reddish-brown (c) it turns green (d) it stays yellow
3. 3.🧺 Which of these is not needed for the leafy bag test? (a) sunlight (b) a clear plastic bag (c) a few hours (d) a battery cell
4. 4.True or false: yeast is not needed for the turmeric test. (a) True (b) False
5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) False (b) True
6. 6.True or false: salt from sea water is done by sieving. (a) True (b) False
7. 7.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) folding paper (c) baking a cake (d) melting ice
8. 8.🔮 Predict: you use plain water instead of vinegar. What happens? (a) very little fizzing (b) it turns to honey (c) the balloon bursts (d) a huge eruption
9. 9.🫗 How do we separate chaff from wheat grain? (a) handpicking (b) sieving (c) winnowing (d) evaporating
10. 10.True or false: salt water is a base. (a) False (b) True
11. 11.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the cream temperature”? (a) we change it (b) we measure it (c) we keep it the same
12. 12.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a mirror (b) cold water to rinse (c) a bowl (d) a timer
13. 13.True or false: melting ice is a change that cannot be undone. (a) True (b) False
14. 14.🧺 Which of these is not needed for the leafy bag test? (a) vinegar (b) a rubber band (c) sunlight (d) a clear plastic bag
15. 15.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) the same muddy water (b) the same funnel (c) the same glass (d) how clear the water is
16. 16.🛟 What should you do after touching soil or seeds? (a) lick your fingers (b) rub your eyes (c) skip washing (d) wash your hands
17. 17.🧺 Do we need an empty bottle for the fizzy balloon? (a) not needed (b) needed
18. 18.True or false: cotton wool is needed for sprouting seeds. (a) False (b) True
19. 19.🛟 What should you do if vinegar splashes in your eye? (a) rub it hard (b) ignore it (c) add baking soda (d) rinse with clean water
20. 20.🔍 Which is the odd one out? (a) sugar water (b) detergent water (c) baking soda water (d) soap solution
21. 21.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) size of the balloon (b) spoons of baking soda (c) the same bottle (d) the kind of balloon
22. 22.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the iron setting is the one thing we change. (a) False (b) True
23. 23.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the kind of juice”? (a) we keep it the same (b) we change it (c) we measure it
24. 24.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is what we measure. (a) True (b) False
25. 25.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) the amount of water (c) size of the balloon
26. 26.🧺 Do we need a mirror for sprouting seeds? (a) needed (b) not needed
27. 27.🧈 Before the butter appears, what does the cream turn into? (a) ice (b) thick whipped cream (c) powder (d) clear water
28. 28.🫧 Which of these is neutral? (a) sugar water (b) lemon juice (c) tamarind water (d) vinegar
29. 29.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a dropper or spoon (c) a comb (d) water
30. 30.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) a balloon (c) lemon juice (d) water
31. 31.🍋 What colour does the lemon writing turn when an adult warms it? (a) blue (b) green (c) white (d) brown
32. 32.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a tray for spills (b) baking soda (c) an empty bottle (d) a magnet
33. 33.True or false: salt water is neutral. (a) False (b) True
34. 34.True or false: a comb is not needed for the yeast balloon. (a) False (b) True
35. 35.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a potted plant (b) vinegar (c) a rubber band (d) a clear plastic bag
36. 36.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
37. 37.🔮 Predict: the jar is filled right to the top with cream. What happens? (a) it is much faster (b) it takes much longer (c) it turns pink (d) it makes salt
38. 38.🔍 Which is the odd one out? (a) chalk powder (b) food colour (c) sawdust (d) sand
39. 39.🔍 Which is the odd one out? (a) melting ice (b) melting butter (c) milk turning to curd (d) dissolving salt
40. 40.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) white at once (c) green (d) reddish

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