Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 108 · 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 is the odd one out? (a) melting butter (b) freezing water (c) rusting iron (d) melting ice
2. 2.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
3. 3.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns blue (b) it turns darker red (c) it disappears (d) it turns yellow again
4. 4.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) soap solution (d) orange juice
5. 5.🔍 Which is the odd one out? (a) vinegar (b) sugar water (c) salt water (d) soap solution
6. 6.True or false: a balloon is not needed for the yeast balloon. (a) True (b) False
7. 7.True or false: a comb is not needed for the turmeric test. (a) False (b) True
8. 8.🔍 Which is the odd one out? (a) vinegar (b) warm water (c) sunlight (d) salt
9. 9.True or false: an empty bottle is not needed for the fizzy balloon. (a) True (b) False
10. 10.True or false: detergent water is a base. (a) True (b) False
11. 11.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we keep it the same (b) we measure it (c) we change it
12. 12.🧺 Do we need turmeric powder for the leafy bag test? (a) not needed (b) needed
13. 13.True or false: salt water keeps turmeric yellow. (a) True (b) False
14. 14.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) salt (c) a mirror (d) a balloon
15. 15.True or false: plain water keeps turmeric yellow. (a) False (b) True
16. 16.True or false: salt water is neutral. (a) False (b) True
17. 17.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
18. 18.🪴 Where did the water inside the bag come from? (a) the rubber band (b) the leaves (c) the rain (d) the plastic
19. 19.🛟 Why is a plastic jar a good choice for shaking? (a) it is hotter (b) it is heavier (c) it will not break (d) it is magnetic
20. 20.True or false: vinegar is an acid. (a) False (b) True
21. 21.True or false: lemon juice is an acid. (a) False (b) True
22. 22.🧈 Which of these is a change that can be undone? (a) rusting iron (b) cooking an egg (c) browning lemon ink (d) freezing water
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a magnet (c) a spoon (d) salt
24. 24.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a funnel (b) sand and pebbles (c) yeast (d) muddy water
25. 25.True or false: chaff from wheat grain is done by winnowing. (a) True (b) False
26. 26.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) yeast (b) moong seeds (c) a small bowl (d) water
27. 27.🪴 Which of these is a job of the leaves? (a) make food in sunlight (b) hold up the leaves (c) carry water upward (d) hold the plant in soil
28. 28.🔍 Which is the odd one out? (a) ironing the paper (b) dipping the cotton bud (c) reading the message (d) writing the message
29. 29.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) salty (b) hot (c) muddier (d) clearer
30. 30.⚖️ Fair test — do seeds need water to sprout? True or false: the same bowls is what we measure. (a) False (b) True
31. 31.🫧 Is plain water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
32. 32.True or false: lemon juice is a base. (a) True (b) False
33. 33.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) neutral (c) a base
34. 34.🔍 Which is the odd one out? (a) folding paper (b) dissolving salt (c) milk turning to curd (d) melting ice
35. 35.True or false: a bowl is needed for making butter. (a) False (b) True
36. 36.True or false: a mirror is needed for the yeast balloon. (a) False (b) True
37. 37.🔍 Which is the odd one out? (a) ironing the paper (b) cutting the lemon (c) putting the iron away (d) writing the message
38. 38.🧺 Do we need a battery cell for the leafy bag test? (a) needed (b) not needed
39. 39.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it grows faster (c) it glows (d) the yeast is killed
40. 40.True or false: husk from rice grain is done by winnowing. (a) True (b) False

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