Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 673 · 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.🫗 How do we separate husk from rice grain? (a) sieving (b) winnowing (c) handpicking (d) evaporating
2. 2.True or false: a balloon is needed for the muddy water filter. (a) False (b) True
3. 3.True or false: a battery cell is not needed for the yeast balloon. (a) False (b) True
4. 4.🔍 Which is the odd one out? (a) sugar water (b) salt water (c) detergent water (d) tamarind water
5. 5.🧺 Do we need a jar with a tight lid for making butter? (a) not needed (b) needed
6. 6.🫧 Is soap solution an acid, a base or neutral? (a) a base (b) an acid (c) neutral
7. 7.🧺 Do we need an empty bottle for the fizzy balloon? (a) not needed (b) needed
8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the number of drops (c) the liquid we test
9. 9.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sniff each bottle hard (c) mix bathroom cleaners (d) sip each liquid
10. 10.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
11. 11.🍋 Which of these steps is a job a child can do? (a) letting the paper dry (b) putting the iron away (c) plugging in the iron (d) cutting the lemon
12. 12.True or false: a balloon is not needed for the fizzy balloon. (a) False (b) True
13. 13.📘 What do we call something that changes colour to show an acid or a base? (a) a pulley (b) a prism (c) a magnet (d) an indicator
14. 14.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
15. 15.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it glows (c) it grows faster (d) it turns to sugar
16. 16.🔍 Which is the odd one out? (a) sugar (b) warm water (c) vinegar (d) time
17. 17.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we keep it the same (b) we measure it (c) we change it
18. 18.🪴 Which part of a plant does this job: hold the plant in soil? (a) roots (b) stem (c) leaves (d) flower
19. 19.🧺 Which of these is not needed for the leafy bag test? (a) sunlight (b) a battery cell (c) a rubber band (d) a clear plastic bag
20. 20.🔍 Which is the odd one out? (a) detergent water (b) plain water (c) soap solution (d) baking soda water
21. 21.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
22. 22.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it sinks to the bottom (b) it floats on top (c) it dissolves (d) it turns to sand
23. 23.🧺 Which of these is needed for the fizzy balloon? (a) a mirror (b) sugar (c) vinegar (d) a seed
24. 24.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the same bottle”? (a) we keep it the same (b) we change it (c) we measure it
25. 25.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: time to make butter is kept the same. (a) True (b) False
26. 26.True or false: a rubber band is not needed for the leafy bag test. (a) False (b) True
27. 27.⚖️ 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 amount of yeast (b) the amount of sugar (c) size of the balloon (d) the water temperature
28. 28.🧺 Do we need yeast for sprouting seeds? (a) needed (b) not needed
29. 29.True or false: bran from wheat flour is done by sieving. (a) True (b) False
30. 30.🧺 Which of these is needed for the secret lemon message? (a) lemon juice (b) yeast (c) turmeric powder (d) a mirror
31. 31.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) nothing (b) the salt (c) the water (d) the mud
32. 32.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
33. 33.True or false: salt water is an acid. (a) False (b) True
34. 34.🧺 Which of these is needed for the muddy water filter? (a) a funnel (b) a mirror (c) a magnet (d) yeast
35. 35.🧂 Which of these does not dissolve in water? (a) baking soda (b) food colour (c) glucose powder (d) chalk powder
36. 36.🧺 Which of these is not needed for the secret lemon message? (a) lemon juice (b) a small bowl (c) an adult with an iron (d) a magnet
37. 37.🛟 Why should you never drink water just because it looks clear? (a) germs are invisible (b) clear water is salty (c) clear water is hot (d) clear water is sweet
38. 38.🫧 Which of these is neutral? (a) detergent water (b) curd (c) lemon juice (d) sugar water
39. 39.True or false: soap solution keeps turmeric yellow. (a) True (b) False
40. 40.True or false: a battery cell is needed for the fizzy balloon. (a) True (b) False

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