Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 741 · 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 not needed for the leafy bag test? (a) a potted plant (b) yeast (c) a clear plastic bag (d) sunlight
2. 2.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is kept the same. (a) True (b) False
3. 3.🍞 Which of these is something yeast does not need? (a) a magnet (b) time (c) sugar (d) warm water
4. 4.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we change it (b) we measure it (c) we keep it the same
5. 5.🪴 Which part of a plant does this job: take in water from soil? (a) stem (b) roots (c) flower (d) leaves
6. 6.True or false: a magnet is something yeast does not need. (a) False (b) True
7. 7.True or false: make seeds is a job of the roots. (a) False (b) True
8. 8.🍋 Why can’t you see the lemon writing once it dries? (a) the paper ate it (b) the ink is magnetic (c) dry juice is see-through (d) it turned into air
9. 9.🧈 Which tool is used in many Indian homes to churn curd into butter? (a) a pressure cooker (b) a sieve (c) a mathani (churner) (d) a rolling pin
10. 10.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
11. 11.🧺 Which of these is not needed for the fizzy balloon? (a) a tray for spills (b) a mirror (c) a funnel or spoon (d) baking soda
12. 12.🌱 Which of these sprouts in a few days? (a) seeds on dry cotton (b) seeds in the freezer (c) wet seeds in the dark (d) boiled seeds
13. 13.🔍 Which is the odd one out? (a) table salt (b) baking soda (c) chalk powder (d) sugar
14. 14.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) sunlight (c) yeast (d) a rubber band
15. 15.🔍 Which is the odd one out? (a) orange juice (b) vinegar (c) sugar water (d) curd
16. 16.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we measure it (b) we keep it the same (c) we change it
17. 17.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) the balloon is smaller (c) it turns to bread (d) the balloon is bigger
18. 18.🍋 Which of these steps is a job for an adult? (a) dipping the cotton bud (b) reading the message (c) ironing the paper (d) letting the paper dry
19. 19.🫗 Which of these is done by winnowing? (a) bran from wheat flour (b) gravel from fine sand (c) chaff from wheat grain (d) sugar from sugar water
20. 20.True or false: salt water is a base. (a) True (b) False
21. 21.True or false: a balloon is not needed for the secret lemon message. (a) False (b) True
22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a magnet (c) a small bottle (d) a balloon
23. 23.True or false: a battery cell is not needed for the leafy bag test. (a) True (b) False
24. 24.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny stars (c) tiny cubes (d) tiny triangles
25. 25.True or false: baking a cake is a change that can be undone. (a) True (b) False
26. 26.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a funnel or spoon (b) sugar (c) a balloon (d) baking soda
27. 27.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) sugar (c) a comb (d) a battery cell
28. 28.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
29. 29.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) seal it in a glass jar (c) put it in your mouth (d) keep it away from eyes
30. 30.True or false: a magnet is not needed for the yeast balloon. (a) True (b) False
31. 31.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a balloon (c) warm water (d) a paper clip
32. 32.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) tiny water drops (b) nothing at all (c) tiny insects (d) salt crystals
33. 33.🫧 Which of these is a base? (a) lemon juice (b) tamarind water (c) vinegar (d) baking soda water
34. 34.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) how many seeds sprout (b) wet or dry cotton (c) the number of seeds
35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the turmeric paper (c) the liquid we test
36. 36.True or false: vinegar is needed for the fizzy balloon. (a) True (b) False
37. 37.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the same bottles (c) the water temperature
38. 38.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) time to make butter (b) the amount of cream (c) the same jar (d) the cream temperature
39. 39.True or false: melting butter is a change that can be undone. (a) False (b) True
40. 40.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) fresh cream (b) a battery cell (c) a bowl (d) a timer

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