Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 553 · 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 cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) the cream temperature (b) time to make butter (c) how hard we shake
2. 2.🍋 Why does the lemon writing turn brown with heat? (a) the iron is brown (b) paper turns lemony (c) heat adds colour (d) the juice scorches first
3. 3.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the amount of vinegar is kept the same. (a) True (b) False
4. 4.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) lemon juice (b) a cotton bud (c) a balloon (d) white paper
5. 5.⚖️ 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
6. 6.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
7. 7.🧺 Do we need a battery cell for sprouting seeds? (a) needed (b) not needed
8. 8.🌱 Which of these is needed for a seed to sprout? (a) water (b) salt (c) soil (d) sunlight
9. 9.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) dry yeast (c) a magnet (d) a balloon
10. 10.True or false: a mirror is needed for the turmeric test. (a) False (b) True
11. 11.True or false: reading the message is a job a child can do. (a) False (b) True
12. 12.🪴 Which of these is a job of the roots? (a) take in water from soil (b) give out water vapour (c) make food in sunlight (d) make seeds
13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a battery cell (c) sugar (d) warm water
14. 14.🧺 Which of these is needed for the fizzy balloon? (a) a magnet (b) a funnel or spoon (c) a comb (d) a battery cell
15. 15.True or false: plain water turns turmeric reddish-brown. (a) True (b) False
16. 16.🛟 What should you do after handling muddy water? (a) lick your fingers (b) nothing is needed (c) wash hands afterwards (d) wipe hands on face
17. 17.True or false: a mirror is not needed for the fizzy balloon. (a) False (b) True
18. 18.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “how dark the writing is”? (a) we measure it (b) we change it (c) we keep it the same
19. 19.🔮 Can the brown writing go back to being invisible? (a) yes, if shaken (b) no, it stays brown (c) yes, in the dark (d) yes, if cooled
20. 20.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) put it in your mouth (c) seal it in a glass jar (d) keep it away from eyes
21. 21.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the size of the plant”? (a) we measure it (b) we keep it the same (c) we change it
22. 22.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it stays yellow (b) it turns blue (c) it turns red (d) it turns black
23. 23.True or false: a clean glass is not needed for the muddy water filter. (a) True (b) False
24. 24.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) plain water (c) sugar water (d) detergent water
25. 25.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
26. 26.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we keep it the same (b) we change it (c) we measure it
27. 27.🛟 Why should you never drink water just because it looks clear? (a) clear water is hot (b) clear water is salty (c) germs are invisible (d) clear water is sweet
28. 28.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) an empty bottle (b) a tray for spills (c) sugar (d) baking soda
29. 29.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
30. 30.🍋 Secret message: who does this step — plugging in the iron? (a) an adult does it (b) a child can do it
31. 31.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same glass is the one thing we change. (a) False (b) True
32. 32.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) the same bowls (b) wet or dry cotton (c) the kind of seeds (d) the number of seeds
33. 33.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) milk turning to curd (c) folding paper (d) baking a cake
34. 34.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a rubber band (b) a potted plant (c) a clear plastic bag (d) turmeric powder
35. 35.True or false: sawdust does not dissolve in water. (a) False (b) True
36. 36.🍋 Secret message: who does this step — letting the paper dry? (a) an adult does it (b) a child can do it
37. 37.🧈 What is the watery liquid left after the butter forms? (a) buttermilk (b) oil (c) honey (d) vinegar
38. 38.🟡 Which of these turns turmeric paper reddish-brown? (a) lemon juice (b) soap solution (c) vinegar (d) sugar water
39. 39.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
40. 40.True or false: sugar is something yeast does not need. (a) True (b) False

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