Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 802 · 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: turmeric powder is needed for the leafy bag test. (a) False (b) True
2. 2.🔍 Which is the odd one out? (a) melting ice (b) milk turning to curd (c) rusting iron (d) browning lemon ink
3. 3.🔍 Which is the odd one out? (a) plain water (b) salt water (c) sugar water (d) vinegar
4. 4.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the kind of balloon (b) the amount of vinegar (c) the same bottle (d) spoons of baking soda
5. 5.🛟 How should the plastic bag be tied around the branch? (a) gently, not too tight (b) with sharp wire (c) as tight as possible (d) with a hot glue gun
6. 6.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) baking soda (c) an empty bottle (d) a seed
7. 7.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
8. 8.True or false: mud from water is done by winnowing. (a) True (b) False
9. 9.🍋 Secret message: who does this step — putting the iron away? (a) an adult does it (b) a child can do it
10. 10.🛟 The water for the yeast should be ___. (a) warm, not hot (b) ice cold (c) very salty (d) boiling hot
11. 11.📘 What do we call plants giving out water vapour from their leaves? (a) transpiration (b) digestion (c) reflection (d) germination
12. 12.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) freezing water (c) rusting iron (d) milk turning to curd
13. 13.🛟 Why must a plastic bag never go over anyone’s head? (a) it changes colour (b) it is too big (c) it can block breathing (d) it gets wet
14. 14.🔮 Predict: you use plain water instead of vinegar. What happens? (a) very little fizzing (b) a huge eruption (c) the balloon bursts (d) it turns to honey
15. 15.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) how many seeds sprout (b) the number of seeds (c) wet or dry cotton
16. 16.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) neutral (c) a base
17. 17.🍞 Which of these is something yeast does not need? (a) time (b) salt (c) sugar (d) warm water
18. 18.🔍 Which is the odd one out? (a) salt (b) sugar (c) water (d) soil
19. 19.🧺 Which of these is needed for the yeast balloon? (a) a balloon (b) a comb (c) turmeric powder (d) a magnet
20. 20.True or false: salt is needed for growing salt crystals. (a) False (b) True
21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we change it (c) we measure it
22. 22.🔍 Which is the odd one out? (a) air (b) sugar (c) sunlight (d) salt
23. 23.True or false: a mirror is needed for the secret lemon message. (a) True (b) False
24. 24.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) lemon juice (c) a magnet (d) turmeric powder
25. 25.🍋 Which of these steps is a job for an adult? (a) dipping the cotton bud (b) reading the message (c) putting the iron away (d) writing the message
26. 26.🔮 Can the brown writing go back to being invisible? (a) no, it stays brown (b) yes, if cooled (c) yes, if shaken (d) yes, in the dark
27. 27.🔮 The fizzing stops after a while. Why? (a) the bottle got tired (b) an ingredient ran out (c) the gas froze (d) the balloon got cold
28. 28.🔍 Which is the odd one out? (a) plugging in the iron (b) writing the message (c) letting the paper dry (d) reading the message
29. 29.📘 Leaves have tiny holes that let out water vapour. What are they called? (a) roots (b) stomata (c) veins (d) petals
30. 30.True or false: a timer is needed for making butter. (a) False (b) True
31. 31.🧺 Which of these is not needed for the fizzy balloon? (a) a magnet (b) a balloon (c) baking soda (d) vinegar
32. 32.True or false: a magnet is needed for making butter. (a) True (b) False
33. 33.🛟 What should you do after touching soil or seeds? (a) skip washing (b) rub your eyes (c) lick your fingers (d) wash your hands
34. 34.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) a small bowl (c) a cotton bud (d) turmeric powder
35. 35.🧺 Do we need a jar with a tight lid for making butter? (a) not needed (b) needed
36. 36.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) a rainbow (b) almost nothing (c) dark brown words (d) blue words
37. 37.🛟 Why should you never drink water just because it looks clear? (a) clear water is sweet (b) clear water is salty (c) germs are invisible (d) clear water is hot
38. 38.🔍 Which is the odd one out? (a) soap solution (b) plain water (c) detergent water (d) baking soda water
39. 39.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) lick your fingers (b) wash your hands (c) rub your eyes (d) skip washing
40. 40.🛟 Who should use the hot iron in the secret message experiment? (a) the youngest child (b) only an adult (c) whoever is fastest (d) any child

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