Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 725 · 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 needed for the yeast balloon? (a) a comb (b) a battery cell (c) turmeric powder (d) sugar
2. 2.🍞 Which of these is something yeast needs? (a) sunlight (b) salt (c) vinegar (d) time
3. 3.🔮 Predict: the adult irons for only one second. What happens? (a) it gets darker (b) the paper floats (c) writing stays faint (d) writing turns green
4. 4.🧺 Do we need muddy water for the muddy water filter? (a) needed (b) not needed
5. 5.🧺 Do we need a balloon for the secret lemon message? (a) needed (b) not needed
6. 6.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) how hard we shake (b) the same jar (c) the cream temperature (d) time to make butter
7. 7.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) fresh cream (b) a jar with a tight lid (c) a bowl (d) yeast
8. 8.🧺 Which of these is needed for making butter? (a) a magnet (b) a mirror (c) a balloon (d) a jar with a tight lid
9. 9.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) hot (b) muddier (c) clearer (d) salty
10. 10.True or false: freezing water is a change that cannot be undone. (a) False (b) True
11. 11.🧺 Which of these is not needed for making butter? (a) a jar with a tight lid (b) a bowl (c) a timer (d) a battery cell
12. 12.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “how dark the writing is”? (a) we change it (b) we keep it the same (c) we measure it
13. 13.🛟 How should the plastic bag be tied around the branch? (a) as tight as possible (b) with sharp wire (c) with a hot glue gun (d) gently, not too tight
14. 14.🛟 Why must a plastic bag never go over anyone’s head? (a) it changes colour (b) it gets wet (c) it is too big (d) it can block breathing
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we keep it the same (b) we change it (c) we measure it
16. 16.True or false: turmeric powder is needed for making butter. (a) False (b) True
17. 17.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) seal it in a glass jar (c) keep it away from eyes (d) put it in your mouth
18. 18.🫗 Is filtered pond water safe to drink? (a) yes, if it is clear (b) no, germs may stay (c) yes, if it is cold (d) yes, always
19. 19.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) more butter forms (b) no butter forms (c) it turns blue (d) it turns to cheese
20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the number of drops (c) the colour we see
21. 21.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) cold water to rinse (b) a timer (c) fresh cream (d) a balloon
22. 22.🫗 Which of these is done by filtering? (a) chaff from wheat grain (b) bad grains from rice (c) sugar from sugar water (d) mud from water
23. 23.🔍 Which is the odd one out? (a) putting the iron away (b) writing the message (c) ironing the paper (d) cutting the lemon
24. 24.True or false: soap solution is not needed for the turmeric test. (a) False (b) True
25. 25.🪴 Which part of a plant does this job: take in water from soil? (a) leaves (b) flower (c) roots (d) stem
26. 26.🍞 Which of these is something yeast needs? (a) a magnet (b) vinegar (c) sunlight (d) warm water
27. 27.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a bowl (b) fresh cream (c) a timer (d) a battery cell
28. 28.🌱 Will these sprout: seeds in the freezer? (a) does not sprout (b) sprouts
29. 29.🧺 Which of these is not needed for the muddy water filter? (a) a magnet (b) cotton or cloth (c) a clean glass (d) muddy water
30. 30.True or false: husk from rice grain is done by filtering. (a) True (b) False
31. 31.🧺 Do we need an empty bottle for the fizzy balloon? (a) not needed (b) needed
32. 32.True or false: soap solution turns turmeric reddish-brown. (a) False (b) True
33. 33.True or false: a cotton bud is needed for the secret lemon message. (a) True (b) False
34. 34.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a comb (c) turmeric powder (d) water
35. 35.🧺 Do we need a magnet for the leafy bag test? (a) needed (b) not needed
36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) False (b) True
37. 37.🔮 Can the brown writing go back to being invisible? (a) yes, if cooled (b) yes, if shaken (c) no, it stays brown (d) yes, in the dark
38. 38.🫗 Which of these is done by handpicking? (a) salt from sea water (b) small stones from dal (c) husk from rice grain (d) sugar from sugar water
39. 39.🍋 Secret message: who does this step — reading the message? (a) a child can do it (b) an adult does it
40. 40.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we change it (b) we keep it the same (c) we measure it

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