Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 574 · 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.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the iron setting is kept the same. (a) True (b) False
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is what we measure. (a) True (b) False
3. 3.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) it turns to cheese (b) no butter forms (c) more butter forms (d) it turns blue
4. 4.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) hydrogen (b) helium (c) oxygen (d) carbon dioxide
5. 5.🧺 Which of these is not needed for the fizzy balloon? (a) a funnel or spoon (b) baking soda (c) a magnet (d) vinegar
6. 6.⚖️ Fair test — do seeds need water to sprout? What do we do with “the kind of seeds”? (a) we change it (b) we measure it (c) we keep it the same
7. 7.True or false: a timer is needed for making butter. (a) True (b) False
8. 8.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) the number of seeds (b) how many seeds sprout (c) wet or dry cotton (d) the same bowls
9. 9.True or false: a funnel is not needed for the muddy water filter. (a) False (b) True
10. 10.🧺 Which of these is not needed for the leafy bag test? (a) a clear plastic bag (b) a potted plant (c) sunlight (d) a mirror
11. 11.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
12. 12.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the kind of juice (b) how dark the writing is (c) the same cotton bud
13. 13.True or false: plain water is neutral. (a) True (b) False
14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we keep it the same (c) we measure it
15. 15.🍞 Why do we add sugar to the yeast? (a) to make it heavy (b) it is food for yeast (c) to colour it (d) to make it sweet
16. 16.True or false: sugar is not needed for the fizzy balloon. (a) True (b) False
17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the colour we see (c) the turmeric paper
18. 18.🍋 What colour does the lemon writing turn when an adult warms it? (a) blue (b) white (c) brown (d) green
19. 19.🪴 Which part of a plant does this job: hold up the leaves? (a) stem (b) roots (c) flower (d) leaves
20. 20.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a battery cell (c) a small bottle (d) warm water
21. 21.🧺 Do we need a battery cell for making butter? (a) needed (b) not needed
22. 22.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) the amount of cream (b) time to make butter (c) how hard we shake (d) the cream temperature
23. 23.🧺 Do we need a mirror for making butter? (a) needed (b) not needed
24. 24.⚖️ Fair test — do seeds need water to sprout? True or false: the same bowls is the one thing we change. (a) True (b) False
25. 25.True or false: letting the paper dry is a job a child can do. (a) True (b) False
26. 26.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) lemon juice (c) a mirror (d) a magnet
27. 27.🫧 Which of these is an acid? (a) sugar water (b) orange juice (c) baking soda water (d) plain water
28. 28.🛟 Who should use the hot iron in the secret message experiment? (a) only an adult (b) the youngest child (c) whoever is fastest (d) any child
29. 29.True or false: sugar does not dissolve in water. (a) True (b) False
30. 30.True or false: yeast is needed for growing salt crystals. (a) False (b) True
31. 31.🌱 Will these sprout: seeds on wet cotton? (a) sprouts (b) does not sprout
32. 32.🛟 What should you do after touching soil or seeds? (a) rub your eyes (b) skip washing (c) lick your fingers (d) wash your hands
33. 33.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) white paper strips (c) a dropper or spoon (d) a mirror
34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the colour we see (c) the light we look in
35. 35.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) spoons of baking soda (b) size of the balloon (c) the amount of vinegar (d) the kind of balloon
36. 36.True or false: a clear plastic bag is not needed for the leafy bag test. (a) False (b) True
37. 37.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) very salty (d) warm, not hot
38. 38.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) a magnet (c) a small bowl (d) lemon juice
39. 39.True or false: yeast is not needed for making butter. (a) True (b) False
40. 40.🍋 Secret message: who does this step — dipping the cotton bud? (a) an adult does it (b) a child can do it

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