Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 269 · 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 is the odd one out? (a) cooking an egg (b) freezing water (c) browning lemon ink (d) rusting iron
2. 2.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) white paper (c) a battery cell (d) an adult with an iron
3. 3.🍋 Which of these steps is a job a child can do? (a) cutting the lemon (b) plugging in the iron (c) putting the iron away (d) dipping the cotton bud
4. 4.True or false: turmeric powder is needed for making butter. (a) True (b) False
5. 5.🧺 Which of these is not needed for the fizzy balloon? (a) a tray for spills (b) a balloon (c) a magnet (d) a funnel or spoon
6. 6.🧂 Which of these does not dissolve in water? (a) chalk powder (b) baking soda (c) glucose powder (d) food colour
7. 7.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
8. 8.🧺 Do we need yeast for the leafy bag test? (a) needed (b) not needed
9. 9.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
10. 10.🫧 Is lemon juice an acid, a base or neutral? (a) neutral (b) a base (c) an acid
11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the colour we see (b) the light we look in (c) the turmeric paper (d) the liquid we test
12. 12.🟡 Which of these keeps turmeric yellow? (a) salt water (b) soap solution (c) detergent water (d) baking soda water
13. 13.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “amount of water drops”? (a) we measure it (b) we keep it the same (c) we change it
14. 14.🧺 Which of these is not needed for the turmeric test? (a) a balloon (b) white paper strips (c) lemon juice (d) a dropper or spoon
15. 15.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
16. 16.⚖️ 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 change it (c) we measure it
17. 17.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) both the same (b) the hot sunny day (c) neither of them (d) the cool cloudy day
18. 18.True or false: a potted plant is not needed for the leafy bag test. (a) True (b) False
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the kind of salt (b) days to see crystals (c) sunny or shady place
20. 20.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a balloon (c) a dropper or spoon (d) soap solution
21. 21.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) it stays white (c) green (d) bright blue
22. 22.True or false: folding paper is a change that can be undone. (a) True (b) False
23. 23.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) turmeric powder (b) a rubber band (c) a few hours (d) a clear plastic bag
24. 24.🧂 Which of these does not dissolve in water? (a) sawdust (b) glucose powder (c) food colour (d) sugar
25. 25.🧺 Which of these is needed for making butter? (a) yeast (b) turmeric powder (c) fresh cream (d) a magnet
26. 26.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the size of the plant is kept the same. (a) False (b) True
27. 27.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed
28. 28.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the filter material (b) the same glass (c) the amount poured (d) how clear the water is
29. 29.🛟 Why should you never drink water just because it looks clear? (a) clear water is sweet (b) clear water is salty (c) clear water is hot (d) germs are invisible
30. 30.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
31. 31.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) next to the baby (c) on the edge of a table (d) in a busy doorway
32. 32.🧈 Which of these is a change that can be undone? (a) rusting iron (b) browning lemon ink (c) baking a cake (d) melting butter
33. 33.🔍 Which is the odd one out? (a) vinegar (b) plain water (c) sugar water (d) salt water
34. 34.True or false: make food in sunlight is a job of the flower. (a) False (b) True
35. 35.🔮 Predict: you use plain water instead of vinegar. What happens? (a) the balloon bursts (b) it turns to honey (c) a huge eruption (d) very little fizzing
36. 36.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the water temperature”? (a) we change it (b) we measure it (c) we keep it the same
37. 37.🧺 Which of these is needed for the secret lemon message? (a) turmeric powder (b) yeast (c) a balloon (d) an adult with an iron
38. 38.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt eats water (c) salt grows roots (d) the dish melts
39. 39.🫗 Which of these is done by evaporating? (a) husk from rice grain (b) bad grains from rice (c) salt from sea water (d) gravel from fine sand
40. 40.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same muddy water”? (a) we keep it the same (b) we measure it (c) we change it

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