Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 386 · 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 sprouting seeds. Which one is NOT needed? (a) a small bowl (b) a few days (c) a balloon (d) moong seeds
2. 2.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is what we measure? (a) sun or shade (b) the same kind of bag (c) the time we wait (d) amount of water drops
3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) True (b) False
4. 4.📘 What is yeast? (a) a kind of salt (b) a kind of sugar (c) a kind of stone (d) a tiny living fungus
5. 5.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) soap solution (c) a dropper or spoon (d) turmeric powder
6. 6.🧺 Which of these is not needed for the secret lemon message? (a) yeast (b) lemon juice (c) a cotton bud (d) a small bowl
7. 7.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
8. 8.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same funnel”? (a) we measure it (b) we keep it the same (c) we change it
9. 9.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the same cotton bud (b) the same paper (c) how dark the writing is (d) the kind of juice
10. 10.🧺 Which of these is not needed for the secret lemon message? (a) a small bowl (b) lemon juice (c) an adult with an iron (d) a balloon
11. 11.🧺 Which of these is needed for the leafy bag test? (a) a mirror (b) vinegar (c) a magnet (d) a clear plastic bag
12. 12.True or false: turmeric powder is not needed for making butter. (a) False (b) True
13. 13.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a rubber band (b) a potted plant (c) a clear plastic bag (d) vinegar
14. 14.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) feed them to pets (b) throw them at friends (c) eat a few to check (d) never put seeds in mouth
15. 15.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it stays yellow (c) it turns blue (d) it turns black
16. 16.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
17. 17.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
18. 18.🧈 What is the watery liquid left after the butter forms? (a) honey (b) vinegar (c) buttermilk (d) oil
19. 19.🍋 Why can’t you see the lemon writing once it dries? (a) the paper ate it (b) it turned into air (c) dry juice is see-through (d) the ink is magnetic
20. 20.True or false: vinegar is a base. (a) True (b) False
21. 21.True or false: turmeric powder is needed for making butter. (a) True (b) False
22. 22.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
23. 23.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) yeast (c) white paper (d) lemon juice
24. 24.🔮 Predict: the adult irons for only one second. What happens? (a) it gets darker (b) writing turns green (c) writing stays faint (d) the paper floats
25. 25.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we measure it (c) we change it
27. 27.🫧 Which of these is a base? (a) tamarind water (b) soap solution (c) lemon juice (d) salt water
28. 28.🧺 Which of these is needed for the secret lemon message? (a) yeast (b) a battery cell (c) a mirror (d) white paper
29. 29.🧈 Which tool is used in many Indian homes to churn curd into butter? (a) a mathani (churner) (b) a rolling pin (c) a pressure cooker (d) a sieve
30. 30.🧺 Do we need white paper for the secret lemon message? (a) not needed (b) needed
31. 31.🔮 Predict: you use plain water instead of vinegar. What happens? (a) very little fizzing (b) the balloon bursts (c) a huge eruption (d) it turns to honey
32. 32.🧺 Do we need a battery cell for the fizzy balloon? (a) needed (b) not needed
33. 33.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
34. 34.🛟 The water for the yeast should be ___. (a) very salty (b) boiling hot (c) ice cold (d) warm, not hot
35. 35.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we keep it the same (b) we measure it (c) we change it
36. 36.🌱 Will these sprout: seeds on wet cotton? (a) does not sprout (b) sprouts
37. 37.🍋 Which of these steps is a job for an adult? (a) letting the paper dry (b) dipping the cotton bud (c) writing the message (d) ironing the paper
38. 38.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
39. 39.🔮 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
40. 40.True or false: salt is needed for growing salt crystals. (a) False (b) True

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