Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 86 · 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.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
2. 2.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) saturated (c) empty (d) frozen
3. 3.⚖️ Fair test — do seeds need water to sprout? What do we do with “the kind of seeds”? (a) we change it (b) we keep it the same (c) we measure it
4. 4.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “size of the balloon”? (a) we measure it (b) we keep it the same (c) we change it
5. 5.🫧 Which of these is neutral? (a) vinegar (b) lemon juice (c) sugar water (d) tamarind water
6. 6.🛟 Why should you never drink water just because it looks clear? (a) clear water is sweet (b) clear water is salty (c) clear water is hot (d) germs are invisible
7. 7.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the cream temperature”? (a) we keep it the same (b) we change it (c) we measure it
8. 8.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
9. 9.🫧 Is baking soda water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
10. 10.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) seal it in a glass jar (c) put it in your mouth (d) keep it away from eyes
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we change it (b) we measure it (c) we keep it the same
12. 12.🧺 Which of these is needed for the secret lemon message? (a) turmeric powder (b) a balloon (c) yeast (d) white paper
13. 13.🧺 Which of these is not needed for the secret lemon message? (a) a small bowl (b) a mirror (c) lemon juice (d) a cotton bud
14. 14.🧺 Which of these is not needed for the leafy bag test? (a) a mirror (b) a clear plastic bag (c) sunlight (d) a rubber band
15. 15.True or false: salt water is a base. (a) False (b) True
16. 16.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny stars (c) tiny triangles (d) tiny spheres
17. 17.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) soap solution (d) salt water
18. 18.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a friend who is running (c) the youngest child (d) a grown-up
19. 19.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same muddy water”? (a) we measure it (b) we change it (c) we keep it the same
20. 20.🌱 Is air needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
21. 21.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the iron setting is what we measure. (a) True (b) False
22. 22.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
23. 23.🧺 Which of these is needed for the leafy bag test? (a) a magnet (b) a potted plant (c) a mirror (d) yeast
24. 24.📘 What do we call something that changes colour to show an acid or a base? (a) an indicator (b) a pulley (c) a prism (d) a magnet
25. 25.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a magnet (c) turmeric powder (d) a dropper or spoon
26. 26.⚖️ 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
27. 27.True or false: dissolving salt is a change that can be undone. (a) True (b) False
28. 28.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) green (c) white at once (d) reddish
29. 29.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) both the same (b) the hot sunny day (c) neither of them (d) the cool cloudy day
30. 30.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) helium (b) hydrogen (c) carbon dioxide (d) oxygen
31. 31.True or false: give out water vapour is a job of the flower. (a) True (b) False
32. 32.🫧 Which of these is a base? (a) orange juice (b) curd (c) soap solution (d) plain water
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) True (b) False
34. 34.True or false: a mirror is not needed for making butter. (a) True (b) False
35. 35.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
36. 36.🧂 Which of these dissolves in water? (a) sugar (b) chalk powder (c) cooking oil (d) sand
37. 37.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
38. 38.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “amount of water drops”? (a) we change it (b) we measure it (c) we keep it the same
39. 39.🔮 Can the brown writing go back to being invisible? (a) yes, in the dark (b) no, it stays brown (c) yes, if cooled (d) yes, if shaken
40. 40.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we change it (b) we measure it (c) we keep it the same

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