Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 921 · 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.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) how many seeds sprout (b) wet or dry cotton (c) the same place (d) the number of seeds
2. 2.🛟 Why should you never drink water just because it looks clear? (a) clear water is sweet (b) germs are invisible (c) clear water is salty (d) clear water is hot
3. 3.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a balloon (c) yeast (d) a spoon
4. 4.🫧 Which of these is neutral? (a) detergent water (b) soap solution (c) sugar water (d) orange juice
5. 5.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) bright red (b) blue (c) dark green (d) pale yellow
6. 6.🫧 Is lemon juice an acid, a base or neutral? (a) neutral (b) a base (c) an acid
7. 7.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it wilts and droops (b) it turns blue (c) it grows faster (d) it flowers more
8. 8.True or false: a mirror is not needed for the muddy water filter. (a) False (b) True
9. 9.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same funnel is kept the same. (a) True (b) False
10. 10.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) an empty bottle (b) vinegar (c) a tray for spills (d) a magnet
11. 11.🔍 Which is the odd one out? (a) browning lemon ink (b) rusting iron (c) cooking an egg (d) melting ice
12. 12.🫗 How do we separate salt from sea water? (a) sieving (b) handpicking (c) evaporating (d) winnowing
13. 13.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) your school uniform (c) a white party dress (d) an old shirt or apron
14. 14.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the kind of juice (b) how dark the writing is (c) the iron setting (d) the same cotton bud
15. 15.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we keep it the same (b) we change it (c) we measure it
16. 16.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is the one thing we change. (a) True (b) False
17. 17.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a magnet (b) a clean glass (c) a funnel (d) cotton or cloth
18. 18.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) baking a cake (c) rusting iron (d) dissolving salt
19. 19.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
20. 20.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is kept the same? (a) sun or shade (b) the same kind of bag (c) amount of water drops
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we change it (b) we measure it (c) we keep it the same
22. 22.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
23. 23.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) how clear the water is (b) the same muddy water (c) the filter material (d) the same funnel
24. 24.🫧 What do you see when baking soda meets vinegar? (a) it turns to ice (b) lots of fizzy bubbles (c) it glows in the dark (d) nothing at all
25. 25.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) no, salt passes through (b) it turns to sugar (c) yes, all of it (d) it turns to sand
26. 26.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) a mirror (c) water (d) soap solution
27. 27.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) keep it away from eyes (c) seal it in a glass jar (d) put it in your mouth
28. 28.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) cold water to rinse (b) a jar with a tight lid (c) a timer (d) a mirror
29. 29.🔍 Which is the odd one out? (a) detergent water (b) tamarind water (c) baking soda water (d) soap solution
30. 30.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
31. 31.🛟 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
32. 32.🫧 Which of these is a base? (a) baking soda water (b) lemon juice (c) vinegar (d) plain water
33. 33.⚖️ 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 iron setting (c) how dark the writing is (d) the kind of juice
34. 34.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) dark brown words (b) blue words (c) a rainbow (d) almost nothing
35. 35.🧺 Which of these is needed for the turmeric test? (a) turmeric powder (b) a balloon (c) a magnet (d) a battery cell
36. 36.🔍 Which is the odd one out? (a) rusting iron (b) baking a cake (c) cooking an egg (d) dissolving salt
37. 37.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) a shallow dish (d) turmeric powder
38. 38.True or false: water is not needed for sprouting seeds. (a) False (b) True
39. 39.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
40. 40.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a rubber band (b) sunlight (c) a clear plastic bag (d) a magnet

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