Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 404 · 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 of these is not needed for growing salt crystals? (a) a shallow dish (b) salt (c) a battery cell (d) a piece of string
2. 2.🛟 What should you do if vinegar splashes in your eye? (a) rub it hard (b) ignore it (c) rinse with clean water (d) add baking soda
3. 3.🧺 Do we need turmeric powder for the leafy bag test? (a) not needed (b) needed
4. 4.True or false: seeds on dry cotton sprouts in a few days. (a) False (b) True
5. 5.🍋 Secret message: who does this step — letting the paper dry? (a) an adult does it (b) a child can do it
6. 6.🧺 Which of these is needed for the secret lemon message? (a) turmeric powder (b) an adult with an iron (c) a mirror (d) a magnet
7. 7.🫗 Why does filtered muddy water look clearer? (a) the water evaporates (b) the mud dissolves (c) the filter adds soap (d) the filter traps mud
8. 8.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a magnet (c) salt (d) yeast
9. 9.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
10. 10.🧺 Do we need a battery cell for the muddy water filter? (a) not needed (b) needed
11. 11.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) there is no change (b) it turns blue (c) it grows bigger (d) it shrinks
12. 12.True or false: sawdust does not dissolve in water. (a) False (b) True
13. 13.🧺 Which of these is not needed for making butter? (a) a bowl (b) a jar with a tight lid (c) a battery cell (d) a timer
14. 14.🍋 Secret message: who does this step — cutting the lemon? (a) a child can do it (b) an adult does it
15. 15.🧺 Do we need a mirror for the muddy water filter? (a) not needed (b) needed
16. 16.True or false: a balloon is needed for making butter. (a) False (b) True
17. 17.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the kind of juice (b) the iron setting (c) the same paper (d) how dark the writing is
18. 18.🔍 Which is the odd one out? (a) sugar (b) vinegar (c) sunlight (d) salt
19. 19.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your best clothes (c) your school uniform (d) an old shirt or apron
20. 20.True or false: baking soda water is an acid. (a) False (b) True
21. 21.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
22. 22.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) melting butter (c) melting ice (d) dissolving salt
23. 23.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a few hours (b) a clear plastic bag (c) yeast (d) a rubber band
24. 24.🧺 Do we need a seed for the fizzy balloon? (a) needed (b) not needed
25. 25.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) browning lemon ink (c) rusting iron (d) melting ice
26. 26.True or false: a balloon is not needed for the yeast balloon. (a) True (b) False
27. 27.🧺 Do we need a rubber band for the leafy bag test? (a) not needed (b) needed
28. 28.True or false: tamarind water is neutral. (a) True (b) False
29. 29.⚖️ Fair test — do seeds need water to sprout? What do we do with “wet or dry cotton”? (a) we measure it (b) we keep it the same (c) we change it
30. 30.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) an adult with an iron (b) a small bowl (c) a cotton bud (d) turmeric powder
31. 31.🧺 Which of these is needed for the secret lemon message? (a) a magnet (b) turmeric powder (c) a cotton bud (d) a mirror
32. 32.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we measure it (b) we keep it the same (c) we change it
33. 33.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
34. 34.🧺 Which of these is needed for the leafy bag test? (a) sunlight (b) a magnet (c) a mirror (d) turmeric powder
35. 35.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) salt crystals (b) nothing at all (c) tiny insects (d) tiny water drops
36. 36.True or false: salt is needed for growing salt crystals. (a) False (b) True
37. 37.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it dissolves (b) it sinks to the bottom (c) it turns to sand (d) it floats on top
38. 38.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the kind of juice (b) the same paper (c) the same cotton bud (d) how dark the writing is
39. 39.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a magnet (b) white paper (c) an adult with an iron (d) a small bowl
40. 40.True or false: warm water is needed for growing salt crystals. (a) True (b) False

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