Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 177 · 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 what we measure? (a) time to make butter (b) how hard we shake (c) the amount of cream (d) the same jar
2. 2.🧺 Which of these is not needed for the fizzy balloon? (a) a balloon (b) vinegar (c) a tray for spills (d) sugar
3. 3.True or false: a magnet is something yeast needs. (a) True (b) False
4. 4.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the amount of yeast (b) the water temperature (c) size of the balloon (d) the amount of water
5. 5.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) how clear the water is (b) the same glass (c) the same muddy water (d) the amount poured
6. 6.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the amount of vinegar (b) size of the balloon (c) the same bottle (d) spoons of baking soda
7. 7.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) no crystals (c) smaller crystals (d) bigger crystals
8. 8.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
9. 9.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) soap solution (c) sugar water (d) lemon juice
10. 10.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) eat a few to check (b) feed them to pets (c) throw them at friends (d) never put seeds in mouth
11. 11.🔮 Predict: the adult irons for only one second. What happens? (a) writing turns green (b) it gets darker (c) the paper floats (d) writing stays faint
12. 12.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
13. 13.🧺 Do we need a battery cell for the fizzy balloon? (a) needed (b) not needed
14. 14.🧺 Which of these is needed for the leafy bag test? (a) turmeric powder (b) a magnet (c) yeast (d) a few hours
15. 15.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) no, salt passes through (b) it turns to sugar (c) it turns to sand (d) yes, all of it
16. 16.🧺 Do we need turmeric powder for the leafy bag test? (a) needed (b) not needed
17. 17.🧺 Which of these is not needed for the muddy water filter? (a) sand and pebbles (b) cotton or cloth (c) muddy water (d) a battery cell
18. 18.True or false: seeds on wet cotton sprouts in a few days. (a) False (b) True
19. 19.🧺 Do we need a rubber band for the leafy bag test? (a) not needed (b) needed
20. 20.⚖️ 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 ironing time (d) the same paper
21. 21.🧺 Do we need white paper for the secret lemon message? (a) needed (b) not needed
22. 22.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) yeast (c) a mirror (d) a piece of string
23. 23.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
24. 24.True or false: small stones from dal is done by handpicking. (a) True (b) False
25. 25.🫧 Which of these is neutral? (a) tamarind water (b) lemon juice (c) detergent water (d) salt water
26. 26.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) vinegar (d) baking soda water
27. 27.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same glass is what we measure. (a) True (b) False
28. 28.⚖️ 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 keep it the same (b) we measure it (c) we change it
29. 29.True or false: vinegar is needed for the fizzy balloon. (a) False (b) True
30. 30.⚖️ Fair test — do seeds need water to sprout? What do we do with “wet or dry cotton”? (a) we keep it the same (b) we change it (c) we measure it
31. 31.⚖️ 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) the amount of cream (c) the same jar (d) time to make butter
32. 32.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is what we measure. (a) False (b) True
33. 33.🍋 Secret message: who does this step — dipping the cotton bud? (a) an adult does it (b) a child can do it
34. 34.🫧 Which of these is neutral? (a) vinegar (b) detergent water (c) baking soda water (d) plain water
35. 35.🟡 Turmeric paper meets detergent water. What happens? (a) turns reddish-brown (b) stays yellow
36. 36.True or false: plugging in the iron is a job for an adult. (a) True (b) False
37. 37.🧺 Do we need yeast for the leafy bag test? (a) not needed (b) needed
38. 38.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “time to make butter”? (a) we measure it (b) we keep it the same (c) we change it
39. 39.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) wet or dry cotton (b) the same place (c) how many seeds sprout (d) the kind of seeds
40. 40.True or false: warm water is not needed for growing salt crystals. (a) True (b) False

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