Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 952 · 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 turns turmeric reddish-brown? (a) lemon juice (b) detergent water (c) plain water (d) vinegar
2. 2.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) helium (b) carbon dioxide (c) oxygen (d) hydrogen
3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) yeast (c) warm water (d) a piece of string
4. 4.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is kept the same. (a) True (b) False
5. 5.True or false: a mirror is not needed for growing salt crystals. (a) False (b) True
6. 6.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
7. 7.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
8. 8.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) False (b) True
9. 9.⚖️ 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 measure it (c) we keep it the same
10. 10.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) it turns to butter (c) sugar crystals form (d) salt crystals form
11. 11.True or false: a few days is needed for sprouting seeds. (a) True (b) False
12. 12.🛟 What should you do after touching soil or seeds? (a) wash your hands (b) lick your fingers (c) skip washing (d) rub your eyes
13. 13.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) lemon juice (c) soap solution (d) detergent water
14. 14.True or false: browning lemon ink is a change that cannot be undone. (a) False (b) True
15. 15.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) turmeric powder (b) a few hours (c) a rubber band (d) sunlight
16. 16.⚖️ 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 muddy water (c) the amount poured (d) how clear the water is
17. 17.⚖️ 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) False (b) True
18. 18.🛟 Who should use the hot iron in the secret message experiment? (a) only an adult (b) whoever is fastest (c) any child (d) the youngest child
19. 19.🧺 Which of these is needed for the secret lemon message? (a) turmeric powder (b) a balloon (c) a battery cell (d) lemon juice
20. 20.🧺 Do we need a clean glass for the muddy water filter? (a) needed (b) not needed
21. 21.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
22. 22.🧺 Which of these is needed for the leafy bag test? (a) a battery cell (b) vinegar (c) a rubber band (d) a mirror
23. 23.🧺 Do we need yeast for the secret lemon message? (a) not needed (b) needed
24. 24.True or false: salt is needed for a seed to sprout. (a) False (b) True
25. 25.True or false: small stones from dal is done by evaporating. (a) True (b) False
26. 26.True or false: warm water is something yeast does not need. (a) True (b) False
27. 27.⚖️ Fair test — do seeds need water to sprout? True or false: wet or dry cotton is kept the same. (a) True (b) False
28. 28.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
29. 29.⚖️ 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) True (b) False
30. 30.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) the cream temperature (b) the same jar (c) the amount of cream (d) time to make butter
31. 31.True or false: yeast is needed for the secret lemon message. (a) False (b) True
32. 32.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is kept the same? (a) amount of water drops (b) sun or shade (c) the time we wait
33. 33.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the cream temperature”? (a) we change it (b) we keep it the same (c) we measure it
34. 34.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the same funnel (b) how clear the water is (c) the same muddy water (d) the filter material
35. 35.🧺 Which of these is needed for the secret lemon message? (a) a mirror (b) turmeric powder (c) yeast (d) a cotton bud
36. 36.True or false: a comb is not needed for the fizzy balloon. (a) False (b) True
37. 37.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) yeast (b) a timer (c) a jar with a tight lid (d) fresh cream
38. 38.True or false: plain water is neutral. (a) False (b) True
39. 39.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a mirror (c) turmeric powder (d) lemon juice
40. 40.🧺 Which of these is not needed for the fizzy balloon? (a) vinegar (b) sugar (c) baking soda (d) an empty bottle

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