Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 171 · 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.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) sugar crystals form (c) it turns to oil (d) it turns to butter
2. 2.🌱 Will these sprout: boiled seeds? (a) sprouts (b) does not sprout
3. 3.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) the dish melts (c) salt eats water (d) water evaporates
4. 4.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) a small bowl (c) a magnet (d) a cotton bud
5. 5.🧺 Do we need a magnet for the fizzy balloon? (a) not needed (b) needed
6. 6.True or false: baking soda water turns turmeric reddish-brown. (a) False (b) True
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) True (b) False
8. 8.📘 Is the fizzing a sign that a new substance is made? (a) yes, a new gas forms (b) it is only dissolving (c) no, nothing changes (d) it is only melting
9. 9.🧈 Which of these is a change that can be undone? (a) baking a cake (b) cooking an egg (c) browning lemon ink (d) melting ice
10. 10.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the same bottles (b) the water temperature (c) size of the balloon
11. 11.🔍 Which is the odd one out? (a) dissolving salt (b) melting butter (c) melting ice (d) rusting iron
12. 12.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we keep it the same (b) we measure it (c) we change it
13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
14. 14.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) detergent water (d) salt water
15. 15.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the same bottle”? (a) we measure it (b) we keep it the same (c) we change it
16. 16.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) time to make butter (b) the amount of cream (c) the cream temperature (d) how hard we shake
17. 17.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same cotton bud”? (a) we measure it (b) we change it (c) we keep it the same
18. 18.🫧 Which of these is a base? (a) salt water (b) sugar water (c) orange juice (d) baking soda water
19. 19.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) dark brown words (b) a rainbow (c) blue words (d) almost nothing
20. 20.🫗 Why does filtered muddy water look clearer? (a) the water evaporates (b) the mud dissolves (c) the filter adds soap (d) the filter traps mud
21. 21.True or false: food colour does not dissolve in water. (a) True (b) False
22. 22.🧺 Do we need a battery cell for the fizzy balloon? (a) not needed (b) needed
23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is the one thing we change. (a) False (b) True
24. 24.True or false: sugar water is neutral. (a) True (b) False
25. 25.🔍 Which is the odd one out? (a) dissolving salt (b) milk turning to curd (c) folding paper (d) freezing water
26. 26.True or false: a comb is not needed for the fizzy balloon. (a) True (b) False
27. 27.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the iron setting (b) the kind of juice (c) how dark the writing is
28. 28.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
29. 29.🔍 Which is the odd one out? (a) small pebbles (b) baking soda (c) table salt (d) sugar
30. 30.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) your school uniform (c) an old shirt or apron (d) a white party dress
31. 31.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a balloon (c) turmeric powder (d) a paper clip
32. 32.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we keep it the same (b) we change it (c) we measure it
33. 33.True or false: wet seeds in the dark sprouts in a few days. (a) False (b) True
34. 34.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns blue (c) reddish-brown (d) it turns green
35. 35.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we keep it the same (b) we change it (c) we measure it
36. 36.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a comb (c) soap solution (d) turmeric powder
37. 37.True or false: a potted plant is not needed for the leafy bag test. (a) False (b) True
38. 38.🧺 Which of these is not needed for the fizzy balloon? (a) baking soda (b) a seed (c) a balloon (d) vinegar
39. 39.🔍 Which is the odd one out? (a) milk turning to curd (b) cooking an egg (c) rusting iron (d) folding paper
40. 40.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) soap solution (c) lemon juice (d) a magnet

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