Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 569 · 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 yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is kept the same. (a) False (b) True
2. 2.🛟 Which safety rule fits the fizzy balloon experiment? (a) keep it away from eyes (b) put it in your mouth (c) shake it near your face (d) seal it in a glass jar
3. 3.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) dry yeast (c) warm water (d) a mirror
4. 4.🧈 What is the watery liquid left after the butter forms? (a) honey (b) vinegar (c) oil (d) buttermilk
5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the turmeric paper (b) the liquid we test (c) the light we look in (d) the colour we see
6. 6.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same muddy water”? (a) we keep it the same (b) we change it (c) we measure it
7. 7.🧺 Do we need vinegar for the leafy bag test? (a) needed (b) not needed
8. 8.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) reddish (c) white at once (d) bright blue
9. 9.⚖️ 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 water (b) size of the balloon (c) the water temperature (d) the same bottles
10. 10.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same cotton bud”? (a) we measure it (b) we change it (c) we keep it the same
11. 11.True or false: vinegar is needed for the fizzy balloon. (a) False (b) True
12. 12.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it turns to sand (b) it floats on top (c) it sinks to the bottom (d) it dissolves
13. 13.True or false: time is something yeast does not need. (a) False (b) True
14. 14.🫧 Which of these is an acid? (a) vinegar (b) salt water (c) detergent water (d) soap solution
15. 15.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) baking soda water (c) sugar water (d) plain water
16. 16.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a battery cell (b) a clear plastic bag (c) a rubber band (d) a few hours
17. 17.True or false: vinegar is not needed for the fizzy balloon. (a) True (b) False
18. 18.🔮 Predict: you stop shaking after only one minute. What do you have? (a) cheese (b) butter lumps (c) still runny cream (d) ghee
19. 19.🍞 Which of these is something yeast needs? (a) vinegar (b) sugar (c) salt (d) a magnet
20. 20.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) sand and pebbles (c) a clean glass (d) a mirror
21. 21.🧺 Which of these is not needed for the leafy bag test? (a) yeast (b) a few hours (c) sunlight (d) a potted plant
22. 22.⚖️ 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
23. 23.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) baking soda water (d) salt water
24. 24.True or false: cold water to rinse is needed for making butter. (a) True (b) False
25. 25.🫧 Is soap solution an acid, a base or neutral? (a) a base (b) neutral (c) an acid
26. 26.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
27. 27.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a magnet (c) a balloon (d) a small bottle
28. 28.🔮 The fizzing stops after a while. Why? (a) an ingredient ran out (b) the balloon got cold (c) the gas froze (d) the bottle got tired
29. 29.🧺 Which of these is not needed for growing salt crystals? (a) a mirror (b) a shallow dish (c) a piece of string (d) salt
30. 30.True or false: melting butter is a change that can be undone. (a) True (b) False
31. 31.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) turmeric powder (b) dry yeast (c) a small bottle (d) a balloon
32. 32.True or false: soap solution is a base. (a) False (b) True
33. 33.⚖️ 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 same jar (c) the cream temperature (d) time to make butter
34. 34.🍋 Why does the lemon writing turn brown with heat? (a) paper turns lemony (b) the iron is brown (c) the juice scorches first (d) heat adds colour
35. 35.True or false: a magnet is needed for the fizzy balloon. (a) True (b) False
36. 36.🫧 Which of these is neutral? (a) vinegar (b) curd (c) tamarind water (d) plain water
37. 37.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
38. 38.🫗 Is filtered pond water safe to drink? (a) yes, if it is cold (b) yes, always (c) no, germs may stay (d) yes, if it is clear
39. 39.True or false: a battery cell is not needed for growing salt crystals. (a) False (b) True
40. 40.🫧 Which of these is an acid? (a) soap solution (b) sugar water (c) lemon juice (d) detergent water

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