Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 917 · 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.🧺 Do we need lemon juice for the secret lemon message? (a) needed (b) not needed
2. 2.True or false: a magnet is not needed for the turmeric test. (a) False (b) True
3. 3.🪴 Which of these is a job of the roots? (a) hold the plant in soil (b) carry water upward (c) give out water vapour (d) make food in sunlight
4. 4.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a battery cell (c) salt (d) a shallow dish
5. 5.🧺 Which of these is needed for the fizzy balloon? (a) sugar (b) a seed (c) baking soda (d) a battery cell
6. 6.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is kept the same. (a) False (b) True
7. 7.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) neutral (c) a base
8. 8.True or false: seeds on wet cotton sprouts in a few days. (a) False (b) True
9. 9.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
10. 10.🫧 Which of these is neutral? (a) vinegar (b) curd (c) sugar water (d) tamarind water
11. 11.True or false: wet seeds by a window sprouts in a few days. (a) False (b) True
12. 12.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the same cotton bud (b) the kind of juice (c) the same paper (d) how dark the writing is
13. 13.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we measure it (b) we change it (c) we keep it the same
14. 14.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is the one thing we change. (a) True (b) False
15. 15.🧺 Do we need a timer for making butter? (a) needed (b) not needed
16. 16.🧺 Which of these is not needed for the leafy bag test? (a) sunlight (b) a clear plastic bag (c) a few hours (d) a magnet
17. 17.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we keep it the same (b) we measure it (c) we change it
18. 18.⚖️ 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) how hard we shake (c) the same jar (d) time to make butter
19. 19.🔍 Which is the odd one out? (a) ironing the paper (b) writing the message (c) putting the iron away (d) cutting the lemon
20. 20.🫧 Which of these is a base? (a) salt water (b) lemon juice (c) baking soda water (d) curd
21. 21.True or false: vinegar is not needed for the fizzy balloon. (a) True (b) False
22. 22.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) how clear the water is (b) the amount poured (c) the filter material (d) the same glass
23. 23.🔮 Predict: the jar is filled right to the top with cream. What happens? (a) it takes much longer (b) it turns pink (c) it makes salt (d) it is much faster
24. 24.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we keep it the same (b) we change it (c) we measure it
25. 25.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a battery cell (b) an adult with an iron (c) a small bowl (d) lemon juice
26. 26.🛟 Why is a plastic jar a good choice for shaking? (a) it is magnetic (b) it is heavier (c) it is hotter (d) it will not break
27. 27.🍞 Which of these is something yeast needs? (a) salt (b) sunlight (c) a magnet (d) time
28. 28.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) cotton wool (b) yeast (c) moong seeds (d) a small bowl
29. 29.True or false: baking soda does not dissolve in water. (a) True (b) False
30. 30.True or false: tamarind water is an acid. (a) True (b) False
31. 31.🌱 Which of these sprouts in a few days? (a) seeds in the freezer (b) seeds on dry cotton (c) boiled seeds (d) wet seeds by a window
32. 32.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) melting butter (c) freezing water (d) dissolving salt
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) a mirror (d) salt
34. 34.🌱 Which of these is needed for a seed to sprout? (a) sunlight (b) warmth (c) sugar (d) soil
35. 35.True or false: a mirror is not needed for the yeast balloon. (a) False (b) True
36. 36.🧈 Before the butter appears, what does the cream turn into? (a) ice (b) clear water (c) powder (d) thick whipped cream
37. 37.🪴 Which part of a plant does this job: carry water upward? (a) leaves (b) flower (c) stem (d) roots
38. 38.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) saturated (c) frozen (d) empty
39. 39.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the kind of plant is kept the same. (a) True (b) False
40. 40.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) feed them to pets (b) eat a few to check (c) throw them at friends (d) never put seeds in mouth

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