Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 244 · 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 fizzy balloon. Which one is NOT needed? (a) baking soda (b) a mirror (c) an empty bottle (d) a tray for spills
2. 2.🫧 Which of these is an acid? (a) curd (b) soap solution (c) detergent water (d) plain water
3. 3.🛟 What should you do after handling muddy water? (a) wash hands afterwards (b) nothing is needed (c) lick your fingers (d) wipe hands on face
4. 4.🧺 Do we need a small bowl for the secret lemon message? (a) needed (b) not needed
5. 5.🫧 Which of these is an acid? (a) tamarind water (b) detergent water (c) baking soda water (d) sugar water
6. 6.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) bright red (b) pale yellow (c) dark green (d) blue
7. 7.🧺 Which of these is needed for the fizzy balloon? (a) a magnet (b) an empty bottle (c) sugar (d) a comb
8. 8.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it floats on top (b) it dissolves (c) it turns to sand (d) it sinks to the bottom
9. 9.True or false: yeast is needed for the secret lemon message. (a) True (b) False
10. 10.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
11. 11.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same muddy water is the one thing we change. (a) True (b) False
12. 12.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we change it (b) we measure it (c) we keep it the same
13. 13.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a dropper or spoon (c) lemon juice (d) a magnet
14. 14.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) blue words (b) almost nothing (c) a rainbow (d) dark brown words
15. 15.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) safe from small children (c) next to the baby (d) on the edge of a table
16. 16.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a battery cell (c) a magnet (d) warm water
17. 17.🍋 What colour does the lemon writing turn when an adult warms it? (a) brown (b) white (c) green (d) blue
18. 18.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) freezing water (c) melting ice (d) dissolving salt
19. 19.🧺 Do we need cotton or cloth for the muddy water filter? (a) not needed (b) needed
20. 20.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is what we measure? (a) the kind of plant (b) sun or shade (c) amount of water drops (d) the size of the plant
21. 21.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) sunlight (b) a potted plant (c) a mirror (d) a clear plastic bag
22. 22.True or false: take in water from soil is a job of the roots. (a) True (b) False
23. 23.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
24. 24.🧺 Which of these is needed for the secret lemon message? (a) turmeric powder (b) a magnet (c) a battery cell (d) a small bowl
25. 25.True or false: salt is something yeast needs. (a) True (b) False
26. 26.📘 The browning of lemon juice with heat is a ___ change. (a) musical (b) physical (c) magnetic (d) chemical
27. 27.🌱 Will these sprout: seeds on wet cotton? (a) does not sprout (b) sprouts
28. 28.True or false: detergent water is neutral. (a) False (b) True
29. 29.🔍 Which is the odd one out? (a) sunlight (b) a magnet (c) salt (d) time
30. 30.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it disappears (b) it turns darker red (c) it turns yellow again (d) it turns blue
31. 31.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we keep it the same (b) we measure it (c) we change it
32. 32.🍞 Which of these is something yeast does not need? (a) warm water (b) sunlight (c) sugar (d) time
33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we keep it the same (c) we measure it
34. 34.True or false: melting butter is a change that cannot be undone. (a) True (b) False
35. 35.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) tamarind water (d) detergent water
36. 36.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the amount of yeast (b) the water temperature (c) size of the balloon
37. 37.🍋 Why does the lemon writing turn brown with heat? (a) heat adds colour (b) paper turns lemony (c) the juice scorches first (d) the iron is brown
38. 38.📘 What do we call a seed starting to grow? (a) evaporation (b) germination (c) pollination (d) condensation
39. 39.🧺 Do we need lemon juice for the secret lemon message? (a) needed (b) not needed
40. 40.🪴 Which of these is a job of the leaves? (a) hold the plant in soil (b) take in water from soil (c) make food in sunlight (d) make seeds

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