Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 264 · 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.🛟 Why must a plastic bag never go over anyone’s head? (a) it can block breathing (b) it gets wet (c) it changes colour (d) it is too big
2. 2.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the same paper (b) the kind of juice (c) how dark the writing is
3. 3.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) the same bottle (b) the amount of vinegar (c) spoons of baking soda (d) size of the balloon
4. 4.🫗 How do we separate small stones from dal? (a) filtering (b) handpicking (c) evaporating (d) sieving
5. 5.True or false: a magnet is not needed for the muddy water filter. (a) True (b) False
6. 6.True or false: cutting the lemon is a job a child can do. (a) False (b) True
7. 7.⚖️ Fair test — do seeds need water to sprout? True or false: the same bowls is the one thing we change. (a) True (b) False
8. 8.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed
9. 9.🧺 Which of these is needed for the leafy bag test? (a) yeast (b) a mirror (c) sunlight (d) a magnet
10. 10.🔍 Which is the odd one out? (a) warm water (b) sugar (c) a magnet (d) time
11. 11.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we change it (b) we keep it the same (c) we measure it
12. 12.True or false: ironing the paper is a job a child can do. (a) True (b) False
13. 13.🧺 Which of these is needed for the fizzy balloon? (a) vinegar (b) a mirror (c) a battery cell (d) sugar
14. 14.🪴 Where did the water inside the bag come from? (a) the rain (b) the plastic (c) the leaves (d) the rubber band
15. 15.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) water (b) moong seeds (c) a magnet (d) a few days
16. 16.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: how clear the water is is kept the same. (a) False (b) True
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) warm water (c) a shallow dish (d) a spoon
18. 18.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
19. 19.🪴 Which part of a plant does this job: make food in sunlight? (a) flower (b) stem (c) leaves (d) roots
20. 20.🫧 Is curd an acid, a base or neutral? (a) a base (b) neutral (c) an acid
21. 21.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the amount of cream”? (a) we keep it the same (b) we measure it (c) we change it
22. 22.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) the cream temperature (b) the amount of cream (c) how hard we shake (d) time to make butter
23. 23.⚖️ Fair test — do seeds need water to sprout? True or false: the kind of seeds is what we measure. (a) True (b) False
24. 24.True or false: a balloon is needed for making butter. (a) True (b) False
25. 25.⚖️ 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
26. 26.True or false: hold up the leaves is a job of the flower. (a) False (b) True
27. 27.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is the one thing we change. (a) True (b) False
28. 28.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) plain water (c) detergent water (d) sugar water
29. 29.True or false: a battery cell is not needed for the muddy water filter. (a) True (b) False
30. 30.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we measure it (b) we keep it the same (c) we change it
31. 31.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) warm water (c) dry yeast (d) a comb
32. 32.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
33. 33.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) put it in your mouth (c) pour it down the sink (d) keep it for a month
34. 34.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) turmeric powder (c) salt (d) a magnet
35. 35.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) a mirror (c) a dropper or spoon (d) water
36. 36.⚖️ 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 ironing time (c) the kind of juice (d) the same paper
37. 37.🫗 Which of these is done by filtering? (a) husk from rice grain (b) small stones from dal (c) mud from water (d) bran from wheat flour
38. 38.🛟 What should you do after touching soil or seeds? (a) wash your hands (b) rub your eyes (c) lick your fingers (d) skip washing
39. 39.True or false: baking soda is not needed for the fizzy balloon. (a) True (b) False
40. 40.🧺 Which of these is not needed for the turmeric test? (a) a battery cell (b) soap solution (c) white paper strips (d) a dropper or spoon

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