Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 561 · 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 making butter. Which one is NOT needed? (a) a timer (b) a jar with a tight lid (c) a magnet (d) cold water to rinse
2. 2.📘 Leaves have tiny holes that let out water vapour. What are they called? (a) petals (b) veins (c) roots (d) stomata
3. 3.⚖️ Fair test — do seeds need water to sprout? What do we do with “the number of seeds”? (a) we keep it the same (b) we change it (c) we measure it
4. 4.🪴 Which of these is a job of the flower? (a) make seeds (b) carry water upward (c) take in water from soil (d) hold the plant in soil
5. 5.🔮 Predict: you use plain water instead of vinegar. What happens? (a) a huge eruption (b) the balloon bursts (c) very little fizzing (d) it turns to honey
6. 6.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
7. 7.🔮 The fizzing stops after a while. Why? (a) the gas froze (b) the balloon got cold (c) the bottle got tired (d) an ingredient ran out
8. 8.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
9. 9.🧺 Do we need cotton or cloth for the muddy water filter? (a) not needed (b) needed
10. 10.🔍 Which is the odd one out? (a) plain water (b) sugar water (c) vinegar (d) salt water
11. 11.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
12. 12.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
13. 13.🟡 Which of these keeps turmeric yellow? (a) plain water (b) baking soda water (c) detergent water (d) soap solution
14. 14.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
15. 15.🧺 Do we need a tray for spills for the fizzy balloon? (a) not needed (b) needed
16. 16.🧺 Which of these is not needed for the secret lemon message? (a) a small bowl (b) a mirror (c) white paper (d) an adult with an iron
17. 17.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
18. 18.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we change it (b) we measure it (c) we keep it the same
19. 19.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) hydrogen (b) carbon dioxide (c) oxygen (d) helium
20. 20.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a rubber band (b) a clear plastic bag (c) turmeric powder (d) a potted plant
21. 21.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a piece of string (c) salt (d) a magnet
22. 22.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a magnet (c) salt (d) a battery cell
23. 23.🔍 Which is the odd one out? (a) warmth (b) water (c) air (d) sugar
24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) a battery cell (d) sugar
25. 25.🧈 Which tool is used in many Indian homes to churn curd into butter? (a) a mathani (churner) (b) a rolling pin (c) a sieve (d) a pressure cooker
26. 26.🫧 Which of these is neutral? (a) vinegar (b) lemon juice (c) salt water (d) baking soda water
27. 27.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is kept the same. (a) True (b) False
28. 28.🍋 Secret message: who does this step — letting the paper dry? (a) an adult does it (b) a child can do it
29. 29.🪴 Which of these is a job of the roots? (a) take in water from soil (b) give out water vapour (c) hold up the leaves (d) carry water upward
30. 30.True or false: salt from sea water is done by evaporating. (a) True (b) False
31. 31.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) a balloon (c) a small bowl (d) a cotton bud
32. 32.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) False (b) True
33. 33.🧺 Do we need a small bowl for the secret lemon message? (a) not needed (b) needed
34. 34.🧺 Which of these is not needed for the muddy water filter? (a) cotton or cloth (b) muddy water (c) yeast (d) sand and pebbles
35. 35.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is kept the same. (a) False (b) True
36. 36.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) white paper (c) a battery cell (d) a small bowl
37. 37.🔮 Predict: you stop shaking after only one minute. What do you have? (a) ghee (b) still runny cream (c) cheese (d) butter lumps
38. 38.True or false: salt is not needed for a seed to sprout. (a) True (b) False
39. 39.🫧 Which of these is an acid? (a) sugar water (b) lemon juice (c) salt water (d) baking soda water
40. 40.🛟 Why must a plastic bag never go over anyone’s head? (a) it is too big (b) it changes colour (c) it gets wet (d) it can block breathing

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