Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 330 · 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 more baking soda blow the balloon up bigger? True or false: the amount of vinegar is kept the same. (a) False (b) True
2. 2.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it turns blue (b) it flowers more (c) it wilts and droops (d) it grows faster
3. 3.🧺 Which of these is needed for the leafy bag test? (a) sunlight (b) a magnet (c) a mirror (d) turmeric powder
4. 4.True or false: turmeric powder is not needed for sprouting seeds. (a) False (b) True
5. 5.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we change it (b) we keep it the same (c) we measure it
6. 6.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
7. 7.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) turmeric powder (b) a bowl (c) a timer (d) a jar with a tight lid
8. 8.🌱 Which of these does not sprout? (a) wet seeds by a window (b) seeds on wet cotton (c) boiled seeds (d) wet seeds in the dark
9. 9.True or false: yeast is not needed for the muddy water filter. (a) False (b) True
10. 10.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
11. 11.🛟 Which safety rule fits the fizzy balloon experiment? (a) keep it away from eyes (b) seal it in a glass jar (c) put it in your mouth (d) shake it near your face
12. 12.🧺 Which of these is not needed for the turmeric test? (a) water (b) a battery cell (c) soap solution (d) lemon juice
13. 13.True or false: chaff from wheat grain is done by evaporating. (a) True (b) False
14. 14.🔍 Which is the odd one out? (a) lemon juice (b) baking soda water (c) salt water (d) tamarind water
15. 15.True or false: soap solution is not needed for the turmeric test. (a) False (b) True
16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we keep it the same (b) we change it (c) we measure it
17. 17.⚖️ 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
18. 18.🛟 What should you do if vinegar splashes in your eye? (a) add baking soda (b) rub it hard (c) rinse with clean water (d) ignore it
19. 19.⚖️ 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) the amount of yeast (b) the amount of sugar (c) the water temperature (d) size of the balloon
20. 20.🔍 Which is the odd one out? (a) salt water (b) sugar water (c) detergent water (d) vinegar
21. 21.🍞 Which of these is something yeast does not need? (a) time (b) sunlight (c) warm water (d) sugar
22. 22.🧺 Do we need sugar for the fizzy balloon? (a) needed (b) not needed
23. 23.🔍 Which is the odd one out? (a) writing the message (b) cutting the lemon (c) letting the paper dry (d) reading the message
24. 24.🧈 What is the watery liquid left after the butter forms? (a) honey (b) buttermilk (c) oil (d) vinegar
25. 25.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap is an acid (c) soap is hot (d) soap water is a base
26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is the one thing we change. (a) False (b) True
27. 27.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) wet or dry cotton (b) the number of seeds (c) how many seeds sprout (d) the same place
28. 28.True or false: lemon juice is not needed for the secret lemon message. (a) True (b) False
29. 29.🛟 What should you do after handling muddy water? (a) wipe hands on face (b) lick your fingers (c) wash hands afterwards (d) nothing is needed
30. 30.🧺 Do we need a mirror for sprouting seeds? (a) not needed (b) needed
31. 31.🫗 Which of these is done by winnowing? (a) mud from water (b) small stones from dal (c) salt from sea water (d) husk from rice grain
32. 32.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
33. 33.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the size of the plant is kept the same. (a) False (b) True
34. 34.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) both stay behind (b) leaves pass through (c) tea stays behind (d) leaves stay behind
35. 35.True or false: a mirror is not needed for the leafy bag test. (a) False (b) True
36. 36.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False
37. 37.🔍 Which is the odd one out? (a) reading the message (b) ironing the paper (c) dipping the cotton bud (d) letting the paper dry
38. 38.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a piece of string (c) warm water (d) a mirror
39. 39.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) a comb (c) a tray for spills (d) vinegar
40. 40.🔮 Can the brown writing go back to being invisible? (a) yes, in the dark (b) no, it stays brown (c) yes, if cooled (d) yes, if shaken

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