Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 126 · 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: a battery cell is not needed for the secret lemon message. (a) True (b) False
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.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) how dark the writing is (b) the kind of juice (c) the iron setting (d) the same cotton bud
4. 4.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) it turns to cheese (b) it turns blue (c) more butter forms (d) no butter forms
5. 5.True or false: lemon juice is an acid. (a) True (b) False
6. 6.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) yeast (c) a rubber band (d) a potted plant
7. 7.🔍 Which is the odd one out? (a) dissolving salt (b) freezing water (c) melting butter (d) rusting iron
8. 8.🌱 Which of these does not sprout? (a) wet seeds in the dark (b) boiled seeds (c) wet seeds by a window (d) seeds on wet cotton
9. 9.🛟 Which safety rule fits the fizzy balloon experiment? (a) put it in your mouth (b) keep it away from eyes (c) shake it near your face (d) seal it in a glass jar
10. 10.⚖️ Fair test — do seeds need water to sprout? True or false: the kind of seeds is kept the same. (a) False (b) True
11. 11.🧺 Which of these is needed for the secret lemon message? (a) a magnet (b) lemon juice (c) a battery cell (d) a balloon
12. 12.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
13. 13.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the same bottles (b) the amount of sugar (c) the amount of yeast (d) size of the balloon
14. 14.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) a magnet (c) a dropper or spoon (d) lemon juice
15. 15.🫧 Which of these is an acid? (a) plain water (b) salt water (c) sugar water (d) orange juice
16. 16.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) spoons of baking soda (b) the amount of vinegar (c) size of the balloon (d) the same bottle
17. 17.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) an empty bottle (b) baking soda (c) a funnel or spoon (d) sugar
18. 18.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the time we wait is kept the same. (a) False (b) True
19. 19.🪴 Which part of a plant does this job: make food in sunlight? (a) leaves (b) stem (c) roots (d) flower
20. 20.🔍 Which is the odd one out? (a) cutting the lemon (b) reading the message (c) plugging in the iron (d) putting the iron away
21. 21.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we change it (b) we keep it the same (c) we measure it
22. 22.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) an old shirt or apron (c) your school uniform (d) a white party dress
23. 23.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the time we wait is the one thing we change. (a) False (b) True
24. 24.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a battery cell (c) sugar (d) a paper clip
25. 25.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) carbon dioxide (b) hydrogen (c) helium (d) oxygen
26. 26.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) lemon juice (b) a cotton bud (c) a balloon (d) white paper
27. 27.🌱 Will these sprout: wet seeds by a window? (a) sprouts (b) does not sprout
28. 28.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of yeast”? (a) we keep it the same (b) we change it (c) we measure it
29. 29.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a tray for spills (b) a funnel or spoon (c) vinegar (d) a mirror
30. 30.🫧 Is baking soda water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
31. 31.True or false: a battery cell is needed for the muddy water filter. (a) True (b) False
32. 32.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the ironing time is kept the same. (a) False (b) True
33. 33.🍋 Secret message: who does this step — putting the iron away? (a) an adult does it (b) a child can do it
34. 34.🧺 Which of these is not needed for the fizzy balloon? (a) baking soda (b) an empty bottle (c) a mirror (d) vinegar
35. 35.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) the kind of balloon (b) size of the balloon (c) spoons of baking soda
36. 36.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
37. 37.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) tea stays behind (b) leaves stay behind (c) leaves pass through (d) both stay behind
38. 38.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to clean floors (c) to colour rice (d) to make bread rise
39. 39.True or false: a magnet is needed for sprouting seeds. (a) True (b) False
40. 40.🧺 Do we need a mirror for the fizzy balloon? (a) not needed (b) needed

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