Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 490 · 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.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a friend who is running (c) the youngest child (d) a grown-up
2. 2.True or false: cotton wool is not needed for sprouting seeds. (a) False (b) True
3. 3.🪴 Which part of a plant does this job: hold the plant in soil? (a) leaves (b) stem (c) roots (d) flower
4. 4.🧺 Which of these is needed for sprouting seeds? (a) a magnet (b) water (c) a mirror (d) yeast
5. 5.🛟 Which safety rule fits the fizzy balloon experiment? (a) keep it away from eyes (b) seal it in a glass jar (c) put it in your mouth (d) shake it near your face
6. 6.🫧 Which of these is neutral? (a) plain water (b) tamarind water (c) detergent water (d) vinegar
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) the kind of salt (b) the amount of salt (c) sunny or shady place (d) the amount of water
8. 8.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
9. 9.🌱 Which of these sprouts in a few days? (a) seeds on dry cotton (b) seeds in the freezer (c) boiled seeds (d) seeds on wet cotton
10. 10.🧺 Do we need a jar with a tight lid for making butter? (a) needed (b) not needed
11. 11.🧺 Do we need yeast for the leafy bag test? (a) not needed (b) needed
12. 12.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
13. 13.🔍 Which is the odd one out? (a) small pebbles (b) sand (c) table salt (d) chalk powder
14. 14.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) yeast (b) a dropper or spoon (c) water (d) soap solution
15. 15.🫗 Which of these is done by handpicking? (a) small stones from dal (b) bran from wheat flour (c) husk from rice grain (d) chaff from wheat grain
16. 16.🛟 Why must the jar lid be screwed on tightly? (a) so cream does not spill (b) so it turns yellow (c) so it gets hot (d) so air gets out
17. 17.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) dry yeast (c) a magnet (d) a small bottle
18. 18.🔍 Which is the odd one out? (a) plain water (b) detergent water (c) sugar water (d) salt water
19. 19.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) sunlight (b) vinegar (c) a potted plant (d) a few hours
20. 20.🔮 The fizzing stops after a while. Why? (a) an ingredient ran out (b) the balloon got cold (c) the gas froze (d) the bottle got tired
21. 21.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
22. 22.🌱 Which of these sprouts in a few days? (a) boiled seeds (b) wet seeds in the dark (c) seeds on dry cotton (d) seeds in the freezer
23. 23.True or false: warm water is needed for growing salt crystals. (a) False (b) True
24. 24.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) baking soda water (c) tamarind water (d) plain water
25. 25.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) spoons of baking soda (b) the kind of balloon (c) size of the balloon
26. 26.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it grows faster (c) it glows (d) the yeast is killed
27. 27.True or false: a comb is not needed for the turmeric test. (a) False (b) True
28. 28.🧺 Do we need a funnel for the muddy water filter? (a) not needed (b) needed
29. 29.🧺 Do we need turmeric powder for the leafy bag test? (a) needed (b) not needed
30. 30.📘 What do we call a seed starting to grow? (a) evaporation (b) germination (c) pollination (d) condensation
31. 31.🫧 Is curd an acid, a base or neutral? (a) a base (b) neutral (c) an acid
32. 32.True or false: water is needed for sprouting seeds. (a) False (b) True
33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False
34. 34.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sip each liquid (c) mix bathroom cleaners (d) sniff each bottle hard
35. 35.📘 Leaves have tiny holes that let out water vapour. What are they called? (a) stomata (b) veins (c) roots (d) petals
36. 36.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) rusting iron (c) cooking an egg (d) freezing water
37. 37.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same muddy water”? (a) we measure it (b) we change it (c) we keep it the same
38. 38.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
39. 39.🧺 Which of these is not needed for the secret lemon message? (a) an adult with an iron (b) white paper (c) a small bowl (d) a magnet
40. 40.🧺 Which of these is needed for the secret lemon message? (a) yeast (b) a balloon (c) a cotton bud (d) a mirror

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