Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 497 · 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.True or false: salt water is neutral. (a) True (b) False
2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the number of drops (c) the liquid we test
3. 3.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) False (b) True
4. 4.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the amount of salt (b) days to see crystals (c) the same dish (d) the amount of water
5. 5.🪴 Which part of a plant does this job: hold the plant in soil? (a) leaves (b) stem (c) flower (d) roots
6. 6.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a mirror (c) a dropper or spoon (d) lemon juice
7. 7.🧺 Which of these is needed for the yeast balloon? (a) dry yeast (b) a battery cell (c) a mirror (d) a comb
8. 8.True or false: folding paper is a change that can be undone. (a) True (b) False
9. 9.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
10. 10.🌱 Which of these does not sprout? (a) seeds on wet cotton (b) wet seeds in the dark (c) wet seeds by a window (d) boiled seeds
11. 11.🔮 The fizzing stops after a while. Why? (a) the bottle got tired (b) the balloon got cold (c) the gas froze (d) an ingredient ran out
12. 12.🧺 Do we need turmeric powder for the secret lemon message? (a) not needed (b) needed
13. 13.🧺 Do we need cotton wool for sprouting seeds? (a) not needed (b) needed
14. 14.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to change its colour (c) to make it very salty (d) to cool the water
15. 15.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a balloon (b) baking soda (c) vinegar (d) a seed
16. 16.🧺 Which of these is needed for the muddy water filter? (a) a magnet (b) a battery cell (c) a mirror (d) cotton or cloth
17. 17.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) more butter forms (b) it turns blue (c) no butter forms (d) it turns to cheese
18. 18.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it shrinks (b) there is no change (c) it grows bigger (d) it turns blue
19. 19.🛟 Who should use the hot iron in the secret message experiment? (a) whoever is fastest (b) the youngest child (c) any child (d) only an adult
20. 20.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we measure it (b) we keep it the same (c) we change it
21. 21.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
22. 22.🔍 Which is the odd one out? (a) plain water (b) baking soda water (c) soap solution (d) detergent water
23. 23.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a magnet (c) a battery cell (d) a balloon
24. 24.🧺 Do we need a small bowl for sprouting seeds? (a) needed (b) not needed
25. 25.🫧 Which of these is an acid? (a) salt water (b) baking soda water (c) curd (d) sugar water
26. 26.🧺 Which of these is needed for the secret lemon message? (a) a cotton bud (b) turmeric powder (c) yeast (d) a balloon
27. 27.🌱 Why do the seeds on dry cotton not sprout? (a) they have no salt (b) they have no water (c) they have no soil (d) they are too wet
28. 28.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) reddish-brown (c) it turns blue (d) it stays yellow
29. 29.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to wash dishes (c) to make bread rise (d) to clean floors
30. 30.🫧 Which of these is neutral? (a) plain water (b) orange juice (c) tamarind water (d) baking soda water
31. 31.🧺 Do we need baking soda for the fizzy balloon? (a) needed (b) not needed
32. 32.🧺 Which of these is not needed for the muddy water filter? (a) muddy water (b) a battery cell (c) sand and pebbles (d) a funnel
33. 33.⚖️ Fair test — do seeds need water to sprout? True or false: the same place is kept the same. (a) True (b) False
34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we change it (c) we keep it the same
35. 35.🍞 Which of these is something yeast needs? (a) salt (b) a magnet (c) vinegar (d) warm water
36. 36.🫗 Why does filtered muddy water look clearer? (a) the filter adds soap (b) the mud dissolves (c) the filter traps mud (d) the water evaporates
37. 37.🌱 Is sugar needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
38. 38.True or false: table salt dissolves in water. (a) True (b) False
39. 39.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the same kind of bag”? (a) we keep it the same (b) we measure it (c) we change it
40. 40.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the ironing time is what we measure. (a) True (b) False

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