Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 63 · 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.🍋 Why can’t you see the lemon writing once it dries? (a) the ink is magnetic (b) the paper ate it (c) it turned into air (d) dry juice is see-through
2. 2.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) nobody needs to (c) the youngest child (d) a grown-up
3. 3.🧺 Do we need muddy water for the muddy water filter? (a) not needed (b) needed
4. 4.🔍 Which is the odd one out? (a) sugar water (b) plain water (c) baking soda water (d) tamarind water
5. 5.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is kept the same. (a) True (b) False
6. 6.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a jar with a tight lid (b) fresh cream (c) a battery cell (d) cold water to rinse
7. 7.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is the one thing we change? (a) the amount of yeast (b) size of the balloon (c) the water temperature (d) the same bottles
8. 8.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) the amount of cream (b) how hard we shake (c) the cream temperature (d) the same jar
9. 9.🛟 How should the plastic bag be tied around the branch? (a) with a hot glue gun (b) with sharp wire (c) gently, not too tight (d) as tight as possible
10. 10.🧺 Do we need a balloon for the fizzy balloon? (a) not needed (b) needed
11. 11.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a mirror (b) lemon juice (c) white paper (d) a cotton bud
12. 12.True or false: white paper is not needed for the secret lemon message. (a) True (b) False
13. 13.⚖️ 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) the same bottle (c) the kind of balloon (d) spoons of baking soda
14. 14.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it turns to sugar (c) it glows (d) the yeast is killed
15. 15.🛟 What should you do after touching soil or seeds? (a) lick your fingers (b) skip washing (c) wash your hands (d) rub your eyes
16. 16.🧺 Which of these is needed for the muddy water filter? (a) turmeric powder (b) a clean glass (c) a battery cell (d) yeast
17. 17.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a battery cell (b) a cotton bud (c) lemon juice (d) an adult with an iron
18. 18.🛟 Why must children keep their fingers away from the iron? (a) it is magnetic (b) it is sticky (c) it is cold (d) it can burn skin
19. 19.True or false: vinegar is something yeast does not need. (a) False (b) True
20. 20.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) in a busy doorway (d) safe from small children
21. 21.⚖️ Fair test — do seeds need water to sprout? What do we do with “wet or dry cotton”? (a) we keep it the same (b) we change it (c) we measure it
22. 22.🛟 Who should use the hot iron in the secret message experiment? (a) any child (b) only an adult (c) the youngest child (d) whoever is fastest
23. 23.True or false: ironing the paper is a job for an adult. (a) False (b) True
24. 24.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we change it (b) we keep it the same (c) we measure it
25. 25.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) sugar water (c) baking soda water (d) vinegar
26. 26.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) lick your fingers (b) rub your eyes (c) wash your hands (d) skip washing
27. 27.🪴 Where did the water inside the bag come from? (a) the leaves (b) the rain (c) the plastic (d) the rubber band
28. 28.🧺 Do we need a balloon for making butter? (a) needed (b) not needed
29. 29.True or false: a battery cell is needed for sprouting seeds. (a) True (b) False
30. 30.True or false: a mirror is not needed for the yeast balloon. (a) True (b) False
31. 31.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) the kind of balloon (b) the same bottle (c) spoons of baking soda (d) size of the balloon
32. 32.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) rusting iron (c) melting ice (d) freezing water
33. 33.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) dark brown words (b) blue words (c) almost nothing (d) a rainbow
34. 34.🧺 Do we need a seed for the fizzy balloon? (a) needed (b) not needed
35. 35.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same cotton bud”? (a) we keep it the same (b) we measure it (c) we change it
36. 36.True or false: yeast is needed for the muddy water filter. (a) True (b) False
37. 37.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it fizzes (c) it turns sweet (d) crystals grow faster
38. 38.🧺 Which of these is not needed for the leafy bag test? (a) a few hours (b) sunlight (c) a magnet (d) a potted plant
39. 39.🫧 What do you see when baking soda meets vinegar? (a) it glows in the dark (b) it turns to ice (c) nothing at all (d) lots of fizzy bubbles
40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we measure it (c) we change it

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