Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 130 · 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 is a change that cannot be undone? (a) melting ice (b) folding paper (c) milk turning to curd (d) dissolving salt
2. 2.True or false: a rubber band is not needed for the leafy bag test. (a) False (b) True
3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) a shallow dish (d) a balloon
4. 4.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a few days (b) a balloon (c) a small bowl (d) cotton wool
5. 5.🛟 What should you do after touching soil or seeds? (a) skip washing (b) wash your hands (c) lick your fingers (d) rub your eyes
6. 6.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a mirror (c) a dropper or spoon (d) lemon juice
7. 7.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is kept the same. (a) True (b) False
8. 8.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns black (b) it turns blue (c) it turns red (d) it stays yellow
9. 9.🌱 Will these sprout: boiled seeds? (a) sprouts (b) does not sprout
10. 10.🧺 Do we need a mirror for the secret lemon message? (a) not needed (b) needed
11. 11.True or false: hold up the leaves is a job of the stem. (a) True (b) False
12. 12.🧈 Which tool is used in many Indian homes to churn curd into butter? (a) a rolling pin (b) a sieve (c) a mathani (churner) (d) a pressure cooker
13. 13.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) a mirror (c) a funnel (d) sand and pebbles
14. 14.True or false: soap solution is needed for the turmeric test. (a) False (b) True
15. 15.True or false: soap solution is not needed for the turmeric test. (a) True (b) False
16. 16.🫧 What do you see when baking soda meets vinegar? (a) nothing at all (b) it turns to ice (c) lots of fizzy bubbles (d) it glows in the dark
17. 17.🧺 Which of these is not needed for making butter? (a) a bowl (b) cold water to rinse (c) fresh cream (d) a battery cell
18. 18.🧺 Which of these is needed for the secret lemon message? (a) an adult with an iron (b) a magnet (c) a balloon (d) a mirror
19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we keep it the same (c) we measure it
20. 20.🍋 Why does the lemon writing turn brown with heat? (a) the juice scorches first (b) the iron is brown (c) heat adds colour (d) paper turns lemony
21. 21.🍋 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) cutting the lemon
22. 22.🍞 Why do we add sugar to the yeast? (a) to colour it (b) it is food for yeast (c) to make it sweet (d) to make it heavy
23. 23.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) an old shirt or apron (c) your school uniform (d) your best clothes
24. 24.True or false: take in water from soil is a job of the roots. (a) False (b) True
25. 25.🛟 Who should use the hot iron in the secret message experiment? (a) whoever is fastest (b) any child (c) only an adult (d) the youngest child
26. 26.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it grows bigger (b) there is no change (c) it shrinks (d) it turns blue
27. 27.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
28. 28.🫗 Is filtered pond water safe to drink? (a) yes, if it is clear (b) yes, always (c) yes, if it is cold (d) no, germs may stay
29. 29.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the amount of cream is kept the same. (a) True (b) False
30. 30.🫧 Is vinegar an acid, a base or neutral? (a) a base (b) neutral (c) an acid
31. 31.🫗 How do we separate husk from rice grain? (a) evaporating (b) filtering (c) sieving (d) winnowing
32. 32.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a mirror (c) a magnet (d) sugar
33. 33.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) bright red (b) dark green (c) pale yellow (d) blue
34. 34.🧈 Which of these is a change that can be undone? (a) rusting iron (b) cooking an egg (c) baking a cake (d) freezing water
35. 35.⚖️ 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 same bottles (c) the water temperature (d) the amount of water
36. 36.🛟 Why should you never drink water just because it looks clear? (a) clear water is salty (b) clear water is hot (c) germs are invisible (d) clear water is sweet
37. 37.🧺 Do we need yeast for the leafy bag test? (a) not needed (b) needed
38. 38.🍞 Which of these is something yeast needs? (a) sugar (b) vinegar (c) sunlight (d) salt
39. 39.🛟 What should you do if vinegar splashes in your eye? (a) rinse with clean water (b) add baking soda (c) rub it hard (d) ignore it
40. 40.🧺 Do we need a mirror for the fizzy balloon? (a) not needed (b) needed

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