Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 58 · 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 muddy water filter. Which one is NOT needed? (a) muddy water (b) a funnel (c) a mirror (d) a clean glass
2. 2.🔮 Predict: the adult irons for only one second. What happens? (a) the paper floats (b) it gets darker (c) writing stays faint (d) writing turns green
3. 3.🍋 Which of these steps is a job a child can do? (a) putting the iron away (b) ironing the paper (c) cutting the lemon (d) dipping the cotton bud
4. 4.🔍 Which is the odd one out? (a) sugar (b) salt (c) sunlight (d) vinegar
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) a magnet (d) a shallow dish
6. 6.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) the kind of balloon (b) size of the balloon (c) spoons of baking soda
7. 7.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) detergent water (c) tamarind water (d) sugar water
8. 8.🧺 Do we need an empty bottle for the fizzy balloon? (a) needed (b) not needed
9. 9.True or false: warm water is needed for growing salt crystals. (a) False (b) True
10. 10.🛟 How should the plastic bag be tied around the branch? (a) with a hot glue gun (b) gently, not too tight (c) as tight as possible (d) with sharp wire
11. 11.True or false: a small bowl is needed for the secret lemon message. (a) False (b) True
12. 12.🔍 Which is the odd one out? (a) orange juice (b) tamarind water (c) vinegar (d) detergent water
13. 13.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) skip washing (b) wash your hands (c) rub your eyes (d) lick your fingers
14. 14.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) a white party dress (c) your school uniform (d) an old shirt or apron
15. 15.🧈 Which of these is a change that can be undone? (a) rusting iron (b) baking a cake (c) cooking an egg (d) freezing water
16. 16.🧺 Do we need yeast for the muddy water filter? (a) not needed (b) needed
17. 17.True or false: a mirror is needed for the fizzy balloon. (a) True (b) False
18. 18.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same muddy water”? (a) we measure it (b) we keep it the same (c) we change it
19. 19.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) cotton wool (b) a small bowl (c) water (d) a mirror
20. 20.🧺 Which of these is needed for the leafy bag test? (a) a battery cell (b) a mirror (c) a potted plant (d) a magnet
21. 21.True or false: salt from sea water is done by sieving. (a) False (b) True
22. 22.🔮 The fizzing stops after a while. Why? (a) the bottle got tired (b) the gas froze (c) the balloon got cold (d) an ingredient ran out
23. 23.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the kind of plant is what we measure. (a) True (b) False
24. 24.🔍 Which is the odd one out? (a) a magnet (b) warm water (c) salt (d) vinegar
25. 25.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) spoons of baking soda (b) size of the balloon (c) the amount of vinegar
26. 26.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) almost nothing (b) blue words (c) a rainbow (d) dark brown words
27. 27.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) there is no change (b) it grows bigger (c) it turns blue (d) it shrinks
28. 28.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) sunlight (d) sugar
29. 29.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) lemon juice (b) a cotton bud (c) a mirror (d) an adult with an iron
30. 30.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is what we measure. (a) False (b) True
31. 31.⚖️ Fair test — do seeds need water to sprout? What do we do with “the kind of seeds”? (a) we change it (b) we keep it the same (c) we measure it
32. 32.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a potted plant (b) a clear plastic bag (c) a rubber band (d) turmeric powder
33. 33.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the amount of vinegar is the one thing we change. (a) False (b) True
34. 34.⚖️ 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 change it (c) we keep it the same
35. 35.🧺 Do we need a magnet for the turmeric test? (a) not needed (b) needed
36. 36.🧂 Which of these does not dissolve in water? (a) table salt (b) chalk powder (c) baking soda (d) food colour
37. 37.True or false: soap solution is a base. (a) True (b) False
38. 38.🫗 Which of these is done by winnowing? (a) mud from water (b) husk from rice grain (c) small stones from dal (d) gravel from fine sand
39. 39.True or false: melting butter is a change that can be undone. (a) True (b) False
40. 40.🧺 Do we need vinegar for the leafy bag test? (a) needed (b) not needed

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