Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 773 · 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 needed for the yeast balloon? (a) a paper clip (b) a mirror (c) a magnet (d) warm water
2. 2.🧺 Do we need turmeric powder for making butter? (a) not needed (b) needed
3. 3.🧺 Which of these is not needed for the yeast balloon? (a) turmeric powder (b) warm water (c) a small bottle (d) dry yeast
4. 4.🧺 Do we need cotton wool for sprouting seeds? (a) not needed (b) needed
5. 5.True or false: a magnet is needed for the secret lemon message. (a) True (b) False
6. 6.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the amount poured is the one thing we change. (a) False (b) True
7. 7.🫗 How do we separate bad grains from rice? (a) filtering (b) winnowing (c) handpicking (d) evaporating
8. 8.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the amount of sugar (b) size of the balloon (c) the water temperature
9. 9.⚖️ 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 kept the same. (a) False (b) True
10. 10.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) tea stays behind (b) leaves stay behind (c) leaves pass through (d) both stay behind
11. 11.🔮 Predict: you use plain water instead of vinegar. What happens? (a) it turns to honey (b) very little fizzing (c) a huge eruption (d) the balloon bursts
12. 12.⚖️ 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
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) the amount of water (b) the kind of salt (c) sunny or shady place (d) the same dish
14. 14.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
15. 15.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the amount poured (b) the same muddy water (c) the filter material (d) how clear the water is
16. 16.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) the amount of vinegar (b) spoons of baking soda (c) the same bottle (d) size of the balloon
17. 17.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same cotton bud is the one thing we change. (a) True (b) False
18. 18.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
19. 19.True or false: a magnet is needed for the leafy bag test. (a) False (b) True
20. 20.🫧 Which of these is neutral? (a) vinegar (b) lemon juice (c) soap solution (d) salt water
21. 21.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) vinegar (c) tamarind water (d) soap solution
22. 22.True or false: baking soda water turns turmeric reddish-brown. (a) True (b) False
23. 23.🫗 Which of these is done by filtering? (a) bran from wheat flour (b) bad grains from rice (c) chaff from wheat grain (d) mud from water
24. 24.True or false: vinegar is not needed for the fizzy balloon. (a) False (b) True
25. 25.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we change it (b) we measure it (c) we keep it the same
26. 26.🔮 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
27. 27.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we change it (b) we measure it (c) we keep it the same
28. 28.🌱 Will these sprout: seeds on wet cotton? (a) does not sprout (b) sprouts
29. 29.📘 The browning of lemon juice with heat is a ___ change. (a) physical (b) musical (c) chemical (d) magnetic
30. 30.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a balloon (c) a battery cell (d) white paper strips
31. 31.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) turmeric powder (c) water (d) yeast
32. 32.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) cotton or cloth (b) a funnel (c) turmeric powder (d) a clean glass
33. 33.True or false: a few days is needed for sprouting seeds. (a) True (b) False
34. 34.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) a friend who is running (d) the youngest child
35. 35.True or false: tea leaves from tea is done by evaporating. (a) True (b) False
36. 36.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) skip washing (b) lick your fingers (c) wash your hands (d) rub your eyes
37. 37.🧺 Which of these is needed for the fizzy balloon? (a) a tray for spills (b) a mirror (c) a battery cell (d) a magnet
38. 38.🔍 Which is the odd one out? (a) melting ice (b) browning lemon ink (c) melting butter (d) freezing water
39. 39.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the cream temperature”? (a) we keep it the same (b) we measure it (c) we change it
40. 40.🧺 Do we need a rubber band for the leafy bag test? (a) not needed (b) needed

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