Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 835 · 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.🫧 Which of these is neutral? (a) soap solution (b) detergent water (c) sugar water (d) tamarind water
2. 2.⚖️ 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
3. 3.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
4. 4.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a spoon (c) salt (d) a battery cell
5. 5.True or false: putting the iron away is a job for an adult. (a) True (b) False
6. 6.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) a balloon (d) a battery cell
7. 7.🔍 Which is the odd one out? (a) vinegar (b) a magnet (c) warm water (d) sunlight
8. 8.True or false: chaff from wheat grain is done by sieving. (a) True (b) False
9. 9.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) blue words (b) almost nothing (c) dark brown words (d) a rainbow
10. 10.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) the cool cloudy day (b) the hot sunny day (c) both the same (d) neither of them
11. 11.⚖️ Fair test — do seeds need water to sprout? True or false: wet or dry cotton is the one thing we change. (a) False (b) True
12. 12.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
13. 13.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) steam (c) carbon dioxide gas (d) air from outside
14. 14.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a balloon (c) a battery cell (d) a mirror
15. 15.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) water (c) soap solution (d) a mirror
16. 16.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) the same bowls (b) how many seeds sprout (c) wet or dry cotton
17. 17.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it disappears (b) it turns yellow again (c) it turns blue (d) it turns darker red
18. 18.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the filter material”? (a) we change it (b) we measure it (c) we keep it the same
19. 19.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) wet or dry cotton (b) how many seeds sprout (c) the number of seeds (d) the kind of seeds
20. 20.🪴 Which of these is a job of the stem? (a) hold the plant in soil (b) make seeds (c) give out water vapour (d) hold up the leaves
21. 21.🔍 Which is the odd one out? (a) cooking oil (b) sand (c) sugar (d) sawdust
22. 22.True or false: a magnet is needed for the muddy water filter. (a) False (b) True
23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the colour we see (b) the turmeric paper (c) the light we look in (d) the liquid we test
24. 24.🍋 Secret message: who does this step — dipping the cotton bud? (a) a child can do it (b) an adult does it
25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) True (b) False
26. 26.True or false: freezing water is a change that cannot be undone. (a) True (b) False
27. 27.True or false: sugar does not dissolve in water. (a) False (b) True
28. 28.⚖️ 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 kind of salt (c) the same dish (d) sunny or shady place
29. 29.True or false: cooking an egg is a change that cannot be undone. (a) False (b) True
30. 30.🧺 Do we need baking soda for the fizzy balloon? (a) needed (b) not needed
31. 31.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
32. 32.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
33. 33.True or false: tea leaves from tea is done by filtering. (a) False (b) True
34. 34.🍋 Which of these steps is a job for an adult? (a) ironing the paper (b) letting the paper dry (c) dipping the cotton bud (d) writing the message
35. 35.🍋 Secret message: who does this step — reading the message? (a) an adult does it (b) a child can do it
36. 36.True or false: make seeds is a job of the flower. (a) False (b) True
37. 37.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) warm, not hot (d) very salty
38. 38.True or false: tamarind water is neutral. (a) False (b) True
39. 39.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a comb (c) a magnet (d) turmeric powder
40. 40.🧺 Which of these is needed for the leafy bag test? (a) vinegar (b) a clear plastic bag (c) a mirror (d) turmeric powder

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