Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 141 · 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 is the odd one out? (a) plain water (b) baking soda water (c) salt water (d) sugar water
2. 2.🧈 Which tool is used in many Indian homes to churn curd into butter? (a) a rolling pin (b) a pressure cooker (c) a sieve (d) a mathani (churner)
3. 3.True or false: an adult with an iron is not needed for the secret lemon message. (a) True (b) False
4. 4.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of sugar”? (a) we measure it (b) we change it (c) we keep it the same
5. 5.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a mirror (b) a cotton bud (c) an adult with an iron (d) white paper
6. 6.True or false: a magnet is needed for the leafy bag test. (a) True (b) False
7. 7.🔮 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
8. 8.⚖️ Fair test — do seeds need water to sprout? What do we do with “how many seeds sprout”? (a) we measure it (b) we keep it the same (c) we change it
9. 9.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we keep it the same (b) we change it (c) we measure it
10. 10.True or false: give out water vapour is a job of the roots. (a) False (b) True
11. 11.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the light we look in (b) the liquid we test (c) the number of drops (d) the turmeric paper
13. 13.True or false: make food in sunlight is a job of the leaves. (a) True (b) False
14. 14.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
15. 15.🧺 Do we need a battery cell for making butter? (a) not needed (b) needed
16. 16.🛟 Who should use the hot iron in the secret message experiment? (a) whoever is fastest (b) only an adult (c) the youngest child (d) any child
17. 17.🧺 Do we need a balloon for the fizzy balloon? (a) needed (b) not needed
18. 18.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we keep it the same (b) we measure it (c) we change it
19. 19.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) rusting iron (c) melting ice (d) browning lemon ink
20. 20.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a seed (b) a funnel or spoon (c) a tray for spills (d) baking soda
21. 21.🧺 Do we need a funnel or spoon for the fizzy balloon? (a) needed (b) not needed
22. 22.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) much less water (b) exactly the same (c) much more water (d) it fills with soil
23. 23.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) lemon juice (c) turmeric powder (d) a battery cell
24. 24.🧺 Which of these is not needed for the fizzy balloon? (a) a battery cell (b) a balloon (c) a tray for spills (d) a funnel or spoon
25. 25.True or false: a balloon is needed for the fizzy balloon. (a) True (b) False
26. 26.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it shrinks (b) it turns blue (c) there is no change (d) it grows bigger
27. 27.🍋 Which of these steps is a job for an adult? (a) writing the message (b) letting the paper dry (c) plugging in the iron (d) reading the message
28. 28.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the same muddy water (b) the same glass (c) the filter material (d) the same funnel
29. 29.True or false: curd is an acid. (a) False (b) True
30. 30.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
31. 31.🛟 Why must children keep their fingers away from the iron? (a) it is cold (b) it is sticky (c) it can burn skin (d) it is magnetic
32. 32.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we measure it (b) we change it (c) we keep it the same
33. 33.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same funnel”? (a) we change it (b) we keep it the same (c) we measure it
34. 34.True or false: yeast is needed for the secret lemon message. (a) True (b) False
35. 35.🍞 Why do we add sugar to the yeast? (a) to make it sweet (b) to make it heavy (c) it is food for yeast (d) to colour it
36. 36.True or false: wet seeds in the dark does not sprout. (a) True (b) False
37. 37.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) keep it away from eyes (c) put it in your mouth (d) seal it in a glass jar
38. 38.🧺 Do we need turmeric powder for the leafy bag test? (a) not needed (b) needed
39. 39.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) salt water (d) detergent water
40. 40.True or false: curd is a base. (a) False (b) True

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