Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 584 · 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.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
2. 2.🫗 How do we separate bad grains from rice? (a) sieving (b) filtering (c) handpicking (d) winnowing
3. 3.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the amount of cream”? (a) we measure it (b) we change it (c) we keep it the same
4. 4.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sniff each bottle hard (c) sip each liquid (d) mix bathroom cleaners
5. 5.🔍 Which is the odd one out? (a) sugar (b) warmth (c) water (d) air
6. 6.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the ironing time (b) how dark the writing is (c) the same paper (d) the kind of juice
7. 7.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a mirror (c) sugar (d) a magnet
8. 8.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) the balloon is smaller (c) it shrinks to nothing (d) it turns to bread
9. 9.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) the cream temperature (b) time to make butter (c) the same jar (d) how hard we shake
10. 10.🛟 Which safety rule fits the fizzy balloon experiment? (a) seal it in a glass jar (b) put it in your mouth (c) keep it away from eyes (d) shake it near your face
11. 11.🔍 Which is the odd one out? (a) chalk powder (b) sugar (c) table salt (d) food colour
12. 12.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) vinegar (c) a tray for spills (d) a battery cell
13. 13.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) wet or dry cotton (b) the kind of seeds (c) the number of seeds (d) how many seeds sprout
14. 14.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the kind of balloon (b) the same bottle (c) spoons of baking soda (d) the amount of vinegar
15. 15.True or false: lemon juice is an acid. (a) False (b) True
16. 16.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns black (c) it stays yellow (d) it turns red
17. 17.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a magnet (b) white paper (c) lemon juice (d) a small bowl
18. 18.🧺 Do we need cotton or cloth for the muddy water filter? (a) not needed (b) needed
19. 19.🪴 Which of these is a job of the flower? (a) take in water from soil (b) make seeds (c) hold the plant in soil (d) hold up the leaves
20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the light we look in (b) the turmeric paper (c) the colour we see (d) the number of drops
21. 21.🧺 Do we need a rubber band for the leafy bag test? (a) not needed (b) needed
22. 22.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) tamarind water (d) baking soda water
23. 23.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) throw them at friends (b) never put seeds in mouth (c) feed them to pets (d) eat a few to check
24. 24.🧺 Do we need turmeric powder for making butter? (a) not needed (b) needed
25. 25.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) the amount of vinegar (b) the kind of balloon (c) spoons of baking soda (d) size of the balloon
26. 26.🔍 Which is the odd one out? (a) cooking oil (b) food colour (c) chalk powder (d) sawdust
27. 27.🔍 Which is the odd one out? (a) sugar (b) warm water (c) sunlight (d) time
28. 28.🧺 Which of these is not needed for sprouting seeds? (a) a small bowl (b) water (c) a balloon (d) moong seeds
29. 29.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
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.True or false: melting ice is a change that can be undone. (a) False (b) True
32. 32.True or false: curd is a base. (a) True (b) False
33. 33.True or false: sugar from sugar water is done by winnowing. (a) False (b) True
34. 34.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) clearer (b) hot (c) salty (d) muddier
35. 35.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) lemon juice (c) turmeric powder (d) white paper
36. 36.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) the dish melts (c) salt grows roots (d) water evaporates
37. 37.True or false: a mirror is not needed for sprouting seeds. (a) True (b) False
38. 38.True or false: vinegar is something yeast needs. (a) False (b) True
39. 39.True or false: a spoon is needed for growing salt crystals. (a) True (b) False
40. 40.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) folding paper (c) dissolving salt (d) baking a cake

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