Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 369 · 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 a base? (a) orange juice (b) tamarind water (c) plain water (d) baking soda water
2. 2.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a mirror (b) lemon juice (c) an adult with an iron (d) a cotton bud
3. 3.🧺 Do we need sunlight for the leafy bag test? (a) needed (b) not needed
4. 4.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a tray for spills (b) vinegar (c) a battery cell (d) a funnel or spoon
5. 5.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it floats on top (b) it dissolves (c) it turns to sand (d) it sinks to the bottom
6. 6.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the amount of yeast (c) the water temperature
7. 7.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a magnet (b) a funnel or spoon (c) vinegar (d) a balloon
8. 8.🔍 What do you see after shaking cream in a jar for a long time? (a) bubbles of gas (b) lumps of butter (c) clear water only (d) sugar crystals
9. 9.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: how clear the water is is the one thing we change. (a) False (b) True
10. 10.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
11. 11.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same cotton bud is what we measure. (a) False (b) True
12. 12.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it turns blue (b) it wilts and droops (c) it flowers more (d) it grows faster
13. 13.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it shrinks (b) it turns blue (c) there is no change (d) it grows bigger
14. 14.🛟 Which safety rule fits the fizzy balloon experiment? (a) put it in your mouth (b) keep it away from eyes (c) seal it in a glass jar (d) shake it near your face
15. 15.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
16. 16.True or false: a rubber band is needed for the leafy bag test. (a) True (b) False
17. 17.🪴 Which of these is a job of the stem? (a) give out water vapour (b) take in water from soil (c) hold the plant in soil (d) carry water upward
18. 18.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is what we measure. (a) True (b) False
19. 19.🔮 The fizzing stops after a while. Why? (a) the bottle got tired (b) the balloon got cold (c) an ingredient ran out (d) the gas froze
20. 20.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) keep it for a month (c) put it in your mouth (d) pour it down the sink
21. 21.🍋 Which of these steps is a job for an adult? (a) putting the iron away (b) writing the message (c) dipping the cotton bud (d) letting the paper dry
22. 22.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) vinegar (c) lemon juice (d) soap solution
23. 23.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it fizzes (c) it turns sweet (d) crystals grow faster
24. 24.🛟 How should the plastic bag be tied around the branch? (a) with a hot glue gun (b) gently, not too tight (c) with sharp wire (d) as tight as possible
25. 25.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
26. 26.True or false: sugar is needed for the yeast balloon. (a) True (b) False
27. 27.🍋 What colour does the lemon writing turn when an adult warms it? (a) blue (b) brown (c) white (d) green
28. 28.⚖️ Fair test — do seeds need water to sprout? True or false: how many seeds sprout is the one thing we change. (a) True (b) False
29. 29.True or false: moong seeds is not needed for sprouting seeds. (a) True (b) False
30. 30.🧂 Which of these dissolves in water? (a) sawdust (b) sand (c) sugar (d) chalk powder
31. 31.🧺 Which of these is not needed for the secret lemon message? (a) a battery cell (b) an adult with an iron (c) a cotton bud (d) lemon juice
32. 32.🔍 Which is the odd one out? (a) plugging in the iron (b) letting the paper dry (c) putting the iron away (d) cutting the lemon
33. 33.🔍 Which is the odd one out? (a) glucose powder (b) sugar (c) baking soda (d) sand
34. 34.🧺 Do we need a rubber band for the leafy bag test? (a) not needed (b) needed
35. 35.🫧 Is tamarind water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
36. 36.🍋 Which of these steps is a job for an adult? (a) letting the paper dry (b) plugging in the iron (c) dipping the cotton bud (d) writing the message
37. 37.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) turmeric powder (b) a rubber band (c) a clear plastic bag (d) sunlight
38. 38.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) rusting iron (c) folding paper (d) dissolving salt
39. 39.🛟 What should you do if vinegar splashes in your eye? (a) rub it hard (b) add baking soda (c) ignore it (d) rinse with clean water
40. 40.True or false: a clear plastic bag is not needed for the leafy bag test. (a) True (b) False

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