Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 437 · 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.🧺 Do we need a bowl for making butter? (a) needed (b) not needed
2. 2.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) carbon dioxide (b) helium (c) hydrogen (d) oxygen
3. 3.True or false: sugar is something yeast needs. (a) False (b) True
4. 4.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a battery cell (b) vinegar (c) a balloon (d) an empty bottle
5. 5.🛟 Why should you never drink water just because it looks clear? (a) germs are invisible (b) clear water is hot (c) clear water is salty (d) clear water is sweet
6. 6.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
7. 7.🔍 Which is the odd one out? (a) sugar (b) salt (c) vinegar (d) a magnet
8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the colour we see (c) the light we look in
9. 9.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) in a busy doorway (c) on the edge of a table (d) next to the baby
10. 10.🫗 Which of these is done by handpicking? (a) small stones from dal (b) husk from rice grain (c) gravel from fine sand (d) bran from wheat flour
11. 11.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
12. 12.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we keep it the same (b) we change it (c) we measure it
13. 13.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) no, salt passes through (b) yes, all of it (c) it turns to sand (d) it turns to sugar
14. 14.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) the amount of water (c) size of the balloon
15. 15.🧺 Do we need sand and pebbles for the muddy water filter? (a) needed (b) not needed
16. 16.🔮 Predict: the jar is filled right to the top with cream. What happens? (a) it turns pink (b) it is much faster (c) it makes salt (d) it takes much longer
17. 17.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to make bread rise (c) to colour rice (d) to clean floors
18. 18.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the same jar”? (a) we change it (b) we measure it (c) we keep it the same
19. 19.True or false: salt water is neutral. (a) False (b) True
20. 20.True or false: chalk powder dissolves in water. (a) True (b) False
21. 21.🧈 Which of these is a change that can be undone? (a) melting butter (b) milk turning to curd (c) rusting iron (d) cooking an egg
22. 22.🔮 Can the brown writing go back to being invisible? (a) yes, if shaken (b) yes, if cooled (c) yes, in the dark (d) no, it stays brown
23. 23.🧈 Before the butter appears, what does the cream turn into? (a) clear water (b) thick whipped cream (c) powder (d) ice
24. 24.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is kept the same? (a) amount of water drops (b) the time we wait (c) sun or shade
25. 25.True or false: a mirror is not needed for the turmeric test. (a) True (b) False
26. 26.True or false: vinegar is neutral. (a) False (b) True
27. 27.🧺 Which of these is needed for the leafy bag test? (a) a mirror (b) a clear plastic bag (c) yeast (d) a magnet
28. 28.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the same paper (b) the kind of juice (c) the same cotton bud (d) how dark the writing is
29. 29.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is kept the same? (a) sun or shade (b) amount of water drops (c) the kind of plant
30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) False (b) True
31. 31.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) sugar (c) a funnel or spoon (d) an empty bottle
32. 32.🧺 Which of these is needed for the muddy water filter? (a) a magnet (b) turmeric powder (c) a battery cell (d) a funnel
33. 33.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) the kind of seeds (b) the same bowls (c) the same place (d) wet or dry cotton
34. 34.True or false: white paper is needed for the secret lemon message. (a) False (b) True
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) salt (d) yeast
36. 36.True or false: dissolving salt is a change that can be undone. (a) True (b) False
37. 37.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) lemon juice (c) soap solution (d) vinegar
38. 38.True or false: turmeric powder is needed for the secret lemon message. (a) True (b) False
39. 39.True or false: a balloon is not needed for the yeast balloon. (a) True (b) False
40. 40.🛟 The water for the yeast should be ___. (a) warm, not hot (b) very salty (c) boiling hot (d) ice cold

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