Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 495 · 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) salt water (c) sugar water (d) soap solution
2. 2.🛟 How should the plastic bag be tied around the branch? (a) with a hot glue gun (b) gently, not too tight (c) as tight as possible (d) with sharp wire
3. 3.True or false: dipping the cotton bud is a job a child can do. (a) True (b) False
4. 4.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) dark brown words (b) almost nothing (c) blue words (d) a rainbow
5. 5.True or false: turmeric powder is needed for the muddy water filter. (a) True (b) False
6. 6.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is the one thing we change? (a) the water temperature (b) the amount of yeast (c) size of the balloon (d) the amount of sugar
7. 7.True or false: husk from rice grain is done by winnowing. (a) False (b) True
8. 8.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the same bottle”? (a) we measure it (b) we keep it the same (c) we change it
9. 9.🔮 Predict: the jar is filled right to the top with cream. What happens? (a) it turns pink (b) it takes much longer (c) it is much faster (d) it makes salt
10. 10.🌱 Which of these is not needed for a seed to sprout? (a) water (b) air (c) warmth (d) salt
11. 11.True or false: a magnet is needed for making butter. (a) True (b) False
12. 12.True or false: chaff from wheat grain is done by handpicking. (a) True (b) False
13. 13.🍋 Which of these steps is a job a child can do? (a) plugging in the iron (b) putting the iron away (c) letting the paper dry (d) ironing the paper
14. 14.🔍 Which is the odd one out? (a) lemon juice (b) tamarind water (c) plain water (d) baking soda water
15. 15.🛟 What should you do after touching soil or seeds? (a) skip washing (b) wash your hands (c) lick your fingers (d) rub your eyes
16. 16.True or false: plain water is neutral. (a) False (b) True
17. 17.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) how dark the writing is (b) the kind of juice (c) the same cotton bud (d) the iron setting
18. 18.True or false: muddy water is needed for the muddy water filter. (a) False (b) True
19. 19.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
20. 20.🧺 Which of these is needed for sprouting seeds? (a) a magnet (b) a mirror (c) a small bowl (d) a battery cell
21. 21.True or false: vinegar is needed for the leafy bag test. (a) True (b) False
22. 22.🍋 Secret message: who does this step — reading the message? (a) an adult does it (b) a child can do it
23. 23.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) lemon juice (b) a cotton bud (c) white paper (d) a battery cell
24. 24.🫧 Is baking soda water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
25. 25.🛟 Why should you never drink water just because it looks clear? (a) clear water is hot (b) clear water is salty (c) clear water is sweet (d) germs are invisible
26. 26.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) a mirror (d) a small bottle
27. 27.🛟 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) never put seeds in mouth (d) throw them at friends
28. 28.🛟 Why must the jar lid be screwed on tightly? (a) so air gets out (b) so it gets hot (c) so cream does not spill (d) so it turns yellow
29. 29.True or false: vinegar is needed for the fizzy balloon. (a) False (b) True
30. 30.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
31. 31.🫧 Which of these is neutral? (a) detergent water (b) lemon juice (c) sugar water (d) soap solution
32. 32.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a balloon (c) white paper strips (d) lemon juice
33. 33.True or false: a battery cell is needed for the yeast balloon. (a) False (b) True
34. 34.🧺 Which of these is needed for the fizzy balloon? (a) a mirror (b) sugar (c) a seed (d) baking soda
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a battery cell (c) a shallow dish (d) a spoon
36. 36.🛟 Why is a plastic jar a good choice for shaking? (a) it is magnetic (b) it is hotter (c) it will not break (d) it is heavier
37. 37.🧺 Do we need a magnet for making butter? (a) not needed (b) needed
38. 38.🧺 Which of these is not needed for making butter? (a) a jar with a tight lid (b) a mirror (c) cold water to rinse (d) a timer
39. 39.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) salt (c) a magnet (d) a piece of string
40. 40.True or false: fresh cream is not needed for making butter. (a) True (b) False

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