Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 606 · 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 sprouting seeds. Which one is NOT needed? (a) a few days (b) water (c) a balloon (d) moong seeds
2. 2.🔍 Which is the odd one out? (a) a magnet (b) vinegar (c) salt (d) sugar
3. 3.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) the same bottle (b) the kind of balloon (c) size of the balloon (d) the amount of vinegar
4. 4.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) vinegar (c) salt water (d) tamarind water
5. 5.True or false: orange juice is neutral. (a) False (b) True
6. 6.🔮 Predict: you use plain water instead of vinegar. What happens? (a) a huge eruption (b) the balloon bursts (c) very little fizzing (d) it turns to honey
7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we keep it the same (c) we change it
8. 8.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) bright blue (c) white at once (d) green
9. 9.True or false: detergent water turns turmeric reddish-brown. (a) True (b) False
10. 10.⚖️ 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
11. 11.🫧 Which of these is an acid? (a) plain water (b) soap solution (c) tamarind water (d) salt water
12. 12.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) soap solution (d) vinegar
13. 13.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) wet or dry cotton (b) the same place (c) the number of seeds (d) the same bowls
14. 14.🧺 Do we need a magnet for sprouting seeds? (a) needed (b) not needed
15. 15.🔮 Predict: the adult irons for only one second. What happens? (a) the paper floats (b) writing stays faint (c) it gets darker (d) writing turns green
16. 16.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a balloon (b) a comb (c) baking soda (d) vinegar
17. 17.⚖️ 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 change it (b) we keep it the same (c) we measure it
18. 18.🛟 What should you do after handling muddy water? (a) wipe hands on face (b) lick your fingers (c) wash hands afterwards (d) nothing is needed
19. 19.🧺 Do we need a balloon for the secret lemon message? (a) not needed (b) needed
20. 20.🫧 Is tamarind water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
21. 21.🔮 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
22. 22.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) the time we wait (b) sun or shade (c) the same kind of bag (d) the size of the plant
23. 23.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it dissolves (b) it floats on top (c) it turns to sand (d) it sinks to the bottom
24. 24.🧺 Do we need a mirror for making butter? (a) not needed (b) needed
25. 25.🎈 Why does the balloon blow up? (a) the bottle shrinks (b) gas is made inside (c) outside air gets in (d) vinegar is hot
26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) sunny or shady place (c) the amount of water
27. 27.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
28. 28.🫧 Is sugar water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
29. 29.🍋 Secret message: who does this step — letting the paper dry? (a) a child can do it (b) an adult does it
30. 30.True or false: white paper is needed for the secret lemon message. (a) True (b) False
31. 31.True or false: fresh cream is not needed for making butter. (a) False (b) True
32. 32.🧺 Do we need cotton or cloth for the muddy water filter? (a) needed (b) not needed
33. 33.🧺 Do we need a battery cell for the secret lemon message? (a) needed (b) not needed
34. 34.⚖️ 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
35. 35.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it stays yellow (c) it turns blue (d) it turns red
36. 36.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) warm water (d) a paper clip
37. 37.True or false: take in water from soil is a job of the stem. (a) False (b) True
38. 38.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
39. 39.True or false: melting butter is a change that cannot be undone. (a) False (b) True
40. 40.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) tea stays behind (b) leaves pass through (c) both stay behind (d) leaves stay behind

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