Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 578 · 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.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
2. 2.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) folding paper (c) dissolving salt (d) rusting iron
3. 3.True or false: yeast is not needed for the muddy water filter. (a) True (b) False
4. 4.🔮 Can the brown writing go back to being invisible? (a) yes, in the dark (b) no, it stays brown (c) yes, if shaken (d) yes, if cooled
5. 5.🧺 Do we need a mirror for the fizzy balloon? (a) needed (b) not needed
6. 6.True or false: a small bowl is needed for sprouting seeds. (a) True (b) False
7. 7.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the time we wait is the one thing we change. (a) False (b) True
8. 8.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same cotton bud is kept the same. (a) False (b) True
9. 9.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold makes it pink (c) cold slows yeast down (d) cold kills sugar
10. 10.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) put it in your mouth (c) keep it away from eyes (d) seal it in a glass jar
11. 11.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we change it (b) we keep it the same (c) we measure it
12. 12.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) fresh cream (b) a bowl (c) yeast (d) a timer
13. 13.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) a tray for spills (c) a seed (d) an empty bottle
14. 14.🫗 Is filtered pond water safe to drink? (a) no, germs may stay (b) yes, if it is clear (c) yes, if it is cold (d) yes, always
15. 15.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a magnet (b) sand and pebbles (c) cotton or cloth (d) a clean glass
16. 16.True or false: a magnet is not needed for making butter. (a) False (b) True
17. 17.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) lemon juice (c) turmeric powder (d) an adult with an iron
18. 18.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) saturated (c) empty (d) frozen
19. 19.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) hot (b) salty (c) muddier (d) clearer
20. 20.🫧 Is lemon juice an acid, a base or neutral? (a) neutral (b) a base (c) an acid
21. 21.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
22. 22.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) your school uniform (c) a white party dress (d) an old shirt or apron
23. 23.True or false: detergent water is neutral. (a) True (b) False
24. 24.🧺 Which of these is needed for making butter? (a) fresh cream (b) a balloon (c) turmeric powder (d) a magnet
25. 25.True or false: a mirror is not needed for the secret lemon message. (a) False (b) True
26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we measure it (b) we keep it the same (c) we change it
27. 27.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is smaller (c) it shrinks to nothing (d) the balloon is bigger
28. 28.True or false: a tray for spills is needed for the fizzy balloon. (a) True (b) False
29. 29.🛟 How should the plastic bag be tied around the branch? (a) with sharp wire (b) with a hot glue gun (c) gently, not too tight (d) as tight as possible
30. 30.🪴 Which of these is a job of the flower? (a) carry water upward (b) take in water from soil (c) make food in sunlight (d) make seeds
31. 31.🔍 Which is the odd one out? (a) salt water (b) sugar water (c) curd (d) plain water
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a battery cell (c) warm water (d) a piece of string
33. 33.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) turmeric powder (b) sunlight (c) a few hours (d) a rubber band
34. 34.True or false: a battery cell is not needed for the yeast balloon. (a) True (b) False
35. 35.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) sugar water (d) baking soda water
36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the number of drops (b) the colour we see (c) the light we look in (d) the liquid we test
37. 37.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same cotton bud”? (a) we measure it (b) we keep it the same (c) we change it
38. 38.🧺 Which of these is not needed for the secret lemon message? (a) a cotton bud (b) yeast (c) white paper (d) a small bowl
39. 39.🔍 Which is the odd one out? (a) sugar water (b) plain water (c) soap solution (d) salt water
40. 40.🔍 Which is the odd one out? (a) browning lemon ink (b) melting butter (c) melting ice (d) dissolving salt

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