Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 671 · 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.🫗 How do we separate chaff from wheat grain? (a) winnowing (b) filtering (c) evaporating (d) handpicking
2. 2.⚖️ 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 amount of salt (b) the same dish (c) the kind of salt (d) sunny or shady place
3. 3.🪴 Which part of a plant does this job: carry water upward? (a) flower (b) stem (c) roots (d) leaves
4. 4.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) salt grows roots (c) the dish melts (d) water evaporates
5. 5.🔍 Which is the odd one out? (a) baking soda (b) food colour (c) chalk powder (d) sugar
6. 6.⚖️ 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) amount of water drops (b) sun or shade (c) the kind of plant (d) the time we wait
7. 7.🫧 Which of these is neutral? (a) baking soda water (b) tamarind water (c) curd (d) plain water
8. 8.🌱 Is water needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
9. 9.True or false: vinegar is not needed for the leafy bag test. (a) True (b) False
10. 10.🛟 The water for the yeast should be ___. (a) warm, not hot (b) ice cold (c) very salty (d) boiling hot
11. 11.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) a cotton bud (c) a battery cell (d) a small bowl
12. 12.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: amount of water drops is what we measure. (a) False (b) True
13. 13.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) a mirror (c) a balloon (d) an empty bottle
14. 14.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the amount of vinegar (b) size of the balloon (c) spoons of baking soda (d) the kind of balloon
15. 15.🧺 Do we need baking soda for the fizzy balloon? (a) needed (b) not needed
16. 16.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) feed them to pets (b) eat a few to check (c) throw them at friends (d) never put seeds in mouth
17. 17.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) empty (c) frozen (d) magnetic
18. 18.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the ironing time”? (a) we keep it the same (b) we measure it (c) we change it
19. 19.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
20. 20.🫗 Which of these is done by evaporating? (a) gravel from fine sand (b) sugar from sugar water (c) husk from rice grain (d) mud from water
21. 21.🛟 Who should use the hot iron in the secret message experiment? (a) whoever is fastest (b) any child (c) the youngest child (d) only an adult
22. 22.True or false: seeds in the freezer does not sprout. (a) True (b) False
23. 23.🧈 Which of these is a change that can be undone? (a) melting butter (b) cooking an egg (c) browning lemon ink (d) milk turning to curd
24. 24.True or false: dissolving salt is a change that can be undone. (a) True (b) False
25. 25.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) it turns to cheese (b) more butter forms (c) it turns blue (d) no butter forms
26. 26.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we change it (b) we keep it the same (c) we measure it
27. 27.🫧 Which of these is an acid? (a) orange juice (b) plain water (c) baking soda water (d) detergent water
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) True (b) False
29. 29.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the iron setting”? (a) we change it (b) we measure it (c) we keep it the same
30. 30.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the kind of plant is kept the same. (a) False (b) True
31. 31.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a small bottle (c) a comb (d) a paper clip
32. 32.🔍 Which is the odd one out? (a) air (b) water (c) soil (d) warmth
33. 33.🌱 Will these sprout: seeds on dry cotton? (a) sprouts (b) does not sprout
34. 34.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the amount poured”? (a) we keep it the same (b) we change it (c) we measure it
35. 35.🫗 Why does filtered muddy water look clearer? (a) the mud dissolves (b) the filter traps mud (c) the water evaporates (d) the filter adds soap
36. 36.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
37. 37.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a small bowl (b) water (c) a few days (d) yeast
38. 38.📘 Is the fizzing a sign that a new substance is made? (a) it is only dissolving (b) it is only melting (c) yes, a new gas forms (d) no, nothing changes
39. 39.🧺 Which of these is not needed for the leafy bag test? (a) a rubber band (b) a mirror (c) sunlight (d) a few hours
40. 40.⚖️ Fair test — do seeds need water to sprout? True or false: the kind of seeds is kept the same. (a) True (b) False

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