Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 547 · 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.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) sugar (c) a small bottle (d) dry yeast
2. 2.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) dark brown words (b) a rainbow (c) almost nothing (d) blue words
3. 3.🧺 Which of these is needed for the muddy water filter? (a) turmeric powder (b) a clean glass (c) a magnet (d) yeast
4. 4.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the filter material”? (a) we keep it the same (b) we change it (c) we measure it
5. 5.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it stays yellow (c) reddish-brown (d) it turns green
6. 6.True or false: a battery cell is not needed for sprouting seeds. (a) False (b) True
7. 7.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we change it (b) we keep it the same (c) we measure it
8. 8.🧺 Which of these is needed for the leafy bag test? (a) a rubber band (b) vinegar (c) yeast (d) a magnet
9. 9.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
10. 10.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) sand and pebbles (b) cotton or cloth (c) a clean glass (d) a battery cell
11. 11.🍋 Why does the lemon writing turn brown with heat? (a) paper turns lemony (b) heat adds colour (c) the iron is brown (d) the juice scorches first
12. 12.🍋 What colour does the lemon writing turn when an adult warms it? (a) green (b) brown (c) white (d) blue
13. 13.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) yeast (b) a few days (c) a small bowl (d) moong seeds
14. 14.🟡 Which of these turns turmeric reddish-brown? (a) baking soda water (b) lemon juice (c) vinegar (d) salt water
15. 15.True or false: muddy water is needed for the muddy water filter. (a) False (b) True
16. 16.🧈 Which tool is used in many Indian homes to churn curd into butter? (a) a sieve (b) a pressure cooker (c) a rolling pin (d) a mathani (churner)
17. 17.📘 The browning of lemon juice with heat is a ___ change. (a) chemical (b) musical (c) physical (d) magnetic
18. 18.🛟 What should you do after handling muddy water? (a) lick your fingers (b) wipe hands on face (c) wash hands afterwards (d) nothing is needed
19. 19.🧺 Do we need a tray for spills for the fizzy balloon? (a) needed (b) not needed
20. 20.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) fresh cream (b) a bowl (c) a jar with a tight lid (d) a balloon
21. 21.True or false: cooking an egg is a change that can be undone. (a) True (b) False
22. 22.True or false: hold up the leaves is a job of the roots. (a) False (b) True
23. 23.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
24. 24.🛟 Why is a plastic jar a good choice for shaking? (a) it will not break (b) it is heavier (c) it is hotter (d) it is magnetic
25. 25.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the same jar”? (a) we keep it the same (b) we change it (c) we measure it
26. 26.🔮 Predict: you use plain water instead of vinegar. What happens? (a) it turns to honey (b) the balloon bursts (c) a huge eruption (d) very little fizzing
27. 27.🌱 Will these sprout: seeds on wet cotton? (a) sprouts (b) does not sprout
28. 28.True or false: vinegar is not needed for the fizzy balloon. (a) False (b) True
29. 29.🫧 Which of these is an acid? (a) plain water (b) detergent water (c) vinegar (d) soap solution
30. 30.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) warm, not hot (d) very salty
31. 31.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the water temperature”? (a) we keep it the same (b) we change it (c) we measure it
32. 32.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the amount of cream is what we measure. (a) False (b) True
33. 33.⚖️ Fair test — do seeds need water to sprout? What do we do with “the kind of seeds”? (a) we keep it the same (b) we measure it (c) we change it
34. 34.🪴 Which part of a plant does this job: carry water upward? (a) leaves (b) roots (c) stem (d) flower
35. 35.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) baking soda water (d) sugar water
36. 36.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) how hard we shake (b) the amount of cream (c) time to make butter (d) the same jar
37. 37.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is the one thing we change. (a) True (b) False
38. 38.🌱 Which of these does not sprout? (a) seeds on dry cotton (b) seeds on wet cotton (c) wet seeds by a window (d) wet seeds in the dark
39. 39.🍞 Why do we add sugar to the yeast? (a) to colour it (b) to make it heavy (c) to make it sweet (d) it is food for yeast
40. 40.🍋 Which of these steps is a job a child can do? (a) putting the iron away (b) letting the paper dry (c) cutting the lemon (d) ironing the paper

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