Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 861 · 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 change that cannot be undone? (a) melting butter (b) browning lemon ink (c) melting ice (d) freezing water
2. 2.⚖️ 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
3. 3.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) next to the baby (c) in a busy doorway (d) on the edge of a table
4. 4.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
5. 5.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) blue (b) bright red (c) dark green (d) pale yellow
6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) False (b) True
7. 7.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) the youngest child (c) nobody needs to (d) a grown-up
8. 8.True or false: fresh cream is not needed for making butter. (a) False (b) True
9. 9.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) few or no crystals (d) crystals grow faster
10. 10.True or false: glucose powder does not dissolve in water. (a) False (b) True
11. 11.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) dark brown words (b) blue words (c) almost nothing (d) a rainbow
12. 12.True or false: a mirror is not needed for the yeast balloon. (a) False (b) True
13. 13.🫧 Which of these is an acid? (a) soap solution (b) salt water (c) sugar water (d) tamarind water
14. 14.🧺 Do we need a mirror for sprouting seeds? (a) not needed (b) needed
15. 15.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the ironing time (b) the kind of juice (c) the iron setting (d) the same cotton bud
16. 16.🫧 Which of these is a base? (a) sugar water (b) lemon juice (c) vinegar (d) baking soda water
17. 17.True or false: dipping the cotton bud is a job a child can do. (a) True (b) False
18. 18.🛟 Who should use the hot iron in the secret message experiment? (a) any child (b) only an adult (c) whoever is fastest (d) the youngest child
19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the light we look in (b) the turmeric paper (c) the number of drops (d) the liquid we test
20. 20.True or false: a magnet is something yeast does not need. (a) False (b) True
21. 21.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) lemon juice (c) tamarind water (d) plain water
22. 22.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) rusting iron (c) browning lemon ink (d) dissolving salt
23. 23.🛟 What should you do if vinegar splashes in your eye? (a) add baking soda (b) ignore it (c) rub it hard (d) rinse with clean water
24. 24.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is the one thing we change. (a) False (b) True
25. 25.True or false: a comb is not needed for the fizzy balloon. (a) False (b) True
26. 26.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) the amount of vinegar (b) size of the balloon (c) the same bottle (d) the kind of balloon
27. 27.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) sugar (c) dry yeast (d) a battery cell
28. 28.True or false: a mirror is needed for sprouting seeds. (a) True (b) False
29. 29.True or false: sugar water keeps turmeric yellow. (a) False (b) True
30. 30.🔍 Which is the odd one out? (a) ironing the paper (b) writing the message (c) dipping the cotton bud (d) letting the paper dry
31. 31.🔍 Which is the odd one out? (a) tamarind water (b) curd (c) orange juice (d) plain water
32. 32.⚖️ Fair test — do seeds need water to sprout? True or false: how many seeds sprout is what we measure. (a) False (b) True
33. 33.🧺 Do we need baking soda for the fizzy balloon? (a) not needed (b) needed
34. 34.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) an adult with an iron (b) white paper (c) a mirror (d) a small bowl
35. 35.🧺 Do we need sugar for the fizzy balloon? (a) needed (b) not needed
36. 36.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) sunlight (b) a few hours (c) a rubber band (d) a battery cell
37. 37.🫧 Which of these is an acid? (a) vinegar (b) sugar water (c) soap solution (d) plain water
38. 38.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
39. 39.🔍 Which is the odd one out? (a) sugar (b) warmth (c) salt (d) sunlight
40. 40.🔍 Which is the odd one out? (a) rusting iron (b) freezing water (c) cooking an egg (d) baking a cake

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