Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 456 · 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.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a battery cell (c) a dropper or spoon (d) lemon juice
2. 2.🫧 Is plain water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
3. 3.🧺 Do we need a balloon for making butter? (a) not needed (b) needed
4. 4.🧺 Which of these is not needed for the muddy water filter? (a) a funnel (b) cotton or cloth (c) a balloon (d) sand and pebbles
5. 5.⚖️ 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) spoons of baking soda (c) size of the balloon (d) the kind of balloon
6. 6.🧺 Which of these is needed for the leafy bag test? (a) a battery cell (b) turmeric powder (c) a few hours (d) a mirror
7. 7.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
8. 8.🧺 Which of these is needed for the muddy water filter? (a) a magnet (b) muddy water (c) turmeric powder (d) a battery cell
9. 9.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) detergent water (c) salt water (d) soap solution
10. 10.🔍 Which is the odd one out? (a) melting butter (b) rusting iron (c) milk turning to curd (d) cooking an egg
11. 11.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
12. 12.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) an empty bottle (b) baking soda (c) vinegar (d) a mirror
13. 13.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it disappears (b) it turns darker red (c) it turns blue (d) it turns yellow again
14. 14.🔍 Which is the odd one out? (a) tamarind water (b) baking soda water (c) lemon juice (d) sugar water
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) warm water (c) yeast (d) a spoon
16. 16.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) wet or dry cotton (b) the number of seeds (c) the same place (d) the kind of seeds
17. 17.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) pour it down the sink (c) keep it for a month (d) put it in your mouth
18. 18.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same place”? (a) we change it (b) we measure it (c) we keep it the same
19. 19.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) muddier (b) hot (c) salty (d) clearer
20. 20.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a clean glass (b) cotton or cloth (c) a magnet (d) muddy water
21. 21.🫧 Which of these is neutral? (a) vinegar (b) salt water (c) detergent water (d) orange juice
22. 22.⚖️ Fair test — do seeds need water to sprout? True or false: the number of seeds is kept the same. (a) False (b) True
23. 23.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we measure it (b) we change it (c) we keep it the same
24. 24.True or false: a few hours is not needed for the leafy bag test. (a) True (b) False
25. 25.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) False (b) True
26. 26.⚖️ Fair test — do seeds need water to sprout? True or false: wet or dry cotton is what we measure. (a) False (b) True
27. 27.True or false: water is not needed for a seed to sprout. (a) True (b) False
28. 28.True or false: a magnet is needed for making butter. (a) False (b) True
29. 29.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) fish make it (c) sea water evaporates (d) salt rains down
30. 30.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is the one thing we change. (a) True (b) False
31. 31.True or false: yeast is needed for growing salt crystals. (a) False (b) True
32. 32.🌱 Which of these sprouts in a few days? (a) seeds on wet cotton (b) seeds on dry cotton (c) boiled seeds (d) seeds in the freezer
33. 33.🫗 How do we separate bad grains from rice? (a) evaporating (b) winnowing (c) handpicking (d) filtering
34. 34.🧺 Do we need a clean glass for the muddy water filter? (a) not needed (b) needed
35. 35.🧺 Which of these is not needed for the secret lemon message? (a) white paper (b) lemon juice (c) yeast (d) a cotton bud
36. 36.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) warm water (c) sugar (d) a mirror
37. 37.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) the youngest child (c) a friend who is running (d) nobody needs to
38. 38.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a balloon (c) a small bottle (d) a battery cell
39. 39.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) time to make butter (b) the cream temperature (c) the amount of cream (d) the same jar
40. 40.True or false: wet seeds in the dark does not sprout. (a) True (b) False

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