Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 819 · 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: tea leaves from tea is done by handpicking. (a) True (b) False
2. 2.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) browning lemon ink (c) melting ice (d) melting butter
3. 3.🧺 Which of these is needed for sprouting seeds? (a) a small bowl (b) a mirror (c) a magnet (d) yeast
4. 4.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) folding paper (c) freezing water (d) melting ice
5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) turmeric powder (d) sugar
6. 6.⚖️ Fair test — do seeds need water to sprout? True or false: the kind of seeds is what we measure. (a) True (b) False
7. 7.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) turmeric powder (c) a dropper or spoon (d) yeast
8. 8.⚖️ Fair test — do seeds need water to sprout? True or false: how many seeds sprout is what we measure. (a) False (b) True
9. 9.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) the filter material (b) the same funnel (c) the same glass (d) how clear the water is
10. 10.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) a friend who is running (d) the youngest child
11. 11.True or false: vinegar is needed for the leafy bag test. (a) True (b) False
12. 12.🔍 Which is the odd one out? (a) dipping the cotton bud (b) ironing the paper (c) cutting the lemon (d) putting the iron away
13. 13.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) dissolving salt (c) baking a cake (d) melting butter
14. 14.True or false: a mirror is needed for the yeast balloon. (a) False (b) True
15. 15.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is the one thing we change. (a) True (b) False
16. 16.🧂 Which of these dissolves in water? (a) sawdust (b) glucose powder (c) cooking oil (d) sand
17. 17.🔍 Which is the odd one out? (a) curd (b) vinegar (c) tamarind water (d) sugar water
18. 18.🫧 Which of these is a base? (a) orange juice (b) curd (c) detergent water (d) lemon juice
19. 19.🧺 Do we need a mirror for the muddy water filter? (a) not needed (b) needed
20. 20.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) both the same (b) the cool cloudy day (c) neither of them (d) the hot sunny day
21. 21.True or false: a battery cell is needed for making butter. (a) True (b) False
22. 22.True or false: an empty bottle is not needed for the fizzy balloon. (a) False (b) True
23. 23.True or false: lemon juice is a base. (a) True (b) False
24. 24.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a funnel (b) a magnet (c) sand and pebbles (d) cotton or cloth
25. 25.🍋 Secret message: who does this step — letting the paper dry? (a) an adult does it (b) a child can do it
26. 26.📘 What do we call plants giving out water vapour from their leaves? (a) germination (b) transpiration (c) digestion (d) reflection
27. 27.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) sunlight (b) a clear plastic bag (c) yeast (d) a potted plant
28. 28.🍋 Secret message: who does this step — putting the iron away? (a) a child can do it (b) an adult does it
29. 29.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
30. 30.True or false: a mirror is needed for the secret lemon message. (a) False (b) True
31. 31.🛟 Which safety rule fits the fizzy balloon experiment? (a) put it in your mouth (b) seal it in a glass jar (c) shake it near your face (d) keep it away from eyes
32. 32.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to colour rice (c) to wash dishes (d) to clean floors
33. 33.True or false: a balloon is not needed for the yeast balloon. (a) True (b) False
34. 34.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a bowl (b) a jar with a tight lid (c) a battery cell (d) fresh cream
35. 35.True or false: bran from wheat flour is done by filtering. (a) True (b) False
36. 36.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the amount poured is kept the same. (a) True (b) False
37. 37.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is kept the same. (a) True (b) False
38. 38.🧂 Which of these does not dissolve in water? (a) sugar (b) glucose powder (c) sawdust (d) food colour
39. 39.🧺 Which of these is needed for the leafy bag test? (a) a clear plastic bag (b) vinegar (c) a battery cell (d) turmeric powder
40. 40.🧈 Which of these is a change that can be undone? (a) baking a cake (b) rusting iron (c) folding paper (d) milk turning to curd

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