Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 777 · 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 needed for the yeast balloon? (a) a battery cell (b) a balloon (c) a magnet (d) turmeric powder
2. 2.🧺 Do we need vinegar for the fizzy balloon? (a) needed (b) not needed
3. 3.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the time we wait is kept the same. (a) False (b) True
4. 4.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a tray for spills (b) a battery cell (c) an empty bottle (d) vinegar
5. 5.🔍 Which is the odd one out? (a) cutting the lemon (b) writing the message (c) plugging in the iron (d) putting the iron away
6. 6.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) the same kind of bag (b) the kind of plant (c) the size of the plant (d) sun or shade
7. 7.🔍 Which is the odd one out? (a) cutting the lemon (b) letting the paper dry (c) writing the message (d) reading the message
8. 8.🧺 Which of these is needed for sprouting seeds? (a) water (b) a mirror (c) a balloon (d) yeast
9. 9.🫗 How do we separate bran from wheat flour? (a) sieving (b) evaporating (c) filtering (d) winnowing
10. 10.🧺 Do we need an empty bottle for the fizzy balloon? (a) not needed (b) needed
11. 11.True or false: a magnet is needed for the leafy bag test. (a) False (b) True
12. 12.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the water temperature (b) the amount of yeast (c) size of the balloon (d) the amount of water
13. 13.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny spheres (c) tiny triangles (d) tiny cubes
14. 14.True or false: food colour does not dissolve in water. (a) False (b) True
15. 15.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the size of the plant is kept the same. (a) False (b) True
16. 16.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) a mirror (d) a small bottle
17. 17.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) detergent water (c) baking soda water (d) tamarind water
18. 18.⚖️ Fair test — do seeds need water to sprout? What do we do with “how many seeds sprout”? (a) we keep it the same (b) we measure it (c) we change it
19. 19.True or false: a balloon is needed for the yeast balloon. (a) False (b) True
20. 20.🧺 Which of these is not needed for the leafy bag test? (a) a potted plant (b) a clear plastic bag (c) sunlight (d) a magnet
21. 21.🍋 Secret message: who does this step — cutting the lemon? (a) a child can do it (b) an adult does it
22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the light we look in (b) the colour we see (c) the liquid we test
23. 23.🧈 Which of these is a change that can be undone? (a) rusting iron (b) milk turning to curd (c) folding paper (d) baking a cake
24. 24.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
25. 25.🔮 The fizzing stops after a while. Why? (a) the balloon got cold (b) the bottle got tired (c) an ingredient ran out (d) the gas froze
26. 26.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) carbon dioxide (b) helium (c) hydrogen (d) oxygen
27. 27.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “how clear the water is”? (a) we change it (b) we keep it the same (c) we measure it
28. 28.🛟 How should the plastic bag be tied around the branch? (a) with sharp wire (b) as tight as possible (c) with a hot glue gun (d) gently, not too tight
29. 29.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) salt (d) turmeric powder
30. 30.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) a balloon (d) a piece of string
31. 31.🧺 Do we need a few hours for the leafy bag test? (a) not needed (b) needed
32. 32.🧈 Which tool is used in many Indian homes to churn curd into butter? (a) a pressure cooker (b) a rolling pin (c) a sieve (d) a mathani (churner)
33. 33.🧺 Which of these is not needed for the fizzy balloon? (a) a mirror (b) baking soda (c) a tray for spills (d) a funnel or spoon
34. 34.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a timer (b) cold water to rinse (c) fresh cream (d) a balloon
35. 35.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) the amount of vinegar (b) the same bottle (c) spoons of baking soda (d) size of the balloon
36. 36.🧺 Which of these is not needed for the secret lemon message? (a) a cotton bud (b) a small bowl (c) a battery cell (d) lemon juice
37. 37.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
38. 38.🪴 Which of these is a job of the stem? (a) hold the plant in soil (b) give out water vapour (c) take in water from soil (d) carry water upward
39. 39.🧺 Do we need turmeric powder for sprouting seeds? (a) needed (b) not needed
40. 40.🛟 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

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