Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 559 · 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.True or false: a battery cell is needed for the turmeric test. (a) True (b) False
2. 2.⚖️ 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 kind of plant (b) amount of water drops (c) the time we wait (d) sun or shade
3. 3.🧺 Do we need a magnet for the leafy bag test? (a) needed (b) not needed
4. 4.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the same jar is kept the same. (a) True (b) False
5. 5.🫗 Which of these is done by sieving? (a) husk from rice grain (b) bad grains from rice (c) small stones from dal (d) bran from wheat flour
6. 6.🧈 Which of these is a change that can be undone? (a) freezing water (b) rusting iron (c) baking a cake (d) browning lemon ink
7. 7.⚖️ 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) False (b) True
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a shallow dish (c) warm water (d) salt
9. 9.🪴 Which of these is a job of the roots? (a) make food in sunlight (b) hold the plant in soil (c) carry water upward (d) give out water vapour
10. 10.🔮 Predict: you stop shaking after only one minute. What do you have? (a) cheese (b) butter lumps (c) still runny cream (d) ghee
11. 11.🧺 Do we need yeast for sprouting seeds? (a) not needed (b) needed
12. 12.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: time to make butter is what we measure. (a) True (b) False
13. 13.🛟 What should you do if vinegar splashes in your eye? (a) rub it hard (b) ignore it (c) rinse with clean water (d) add baking soda
14. 14.🫧 Which of these is an acid? (a) sugar water (b) plain water (c) baking soda water (d) vinegar
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 same glass (b) the same funnel (c) the filter material (d) how clear the water is
16. 16.🫧 Is plain water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
17. 17.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is smaller (c) the balloon is bigger (d) it shrinks to nothing
18. 18.True or false: a clean glass is needed for the muddy water filter. (a) False (b) True
19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the liquid we test (c) the colour we see (d) the light we look in
20. 20.🍋 What colour does the lemon writing turn when an adult warms it? (a) blue (b) green (c) white (d) brown
21. 21.🔍 Which is the odd one out? (a) water (b) sugar (c) sunlight (d) soil
22. 22.True or false: baking soda water is a base. (a) True (b) False
23. 23.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a few days (b) water (c) moong seeds (d) turmeric powder
24. 24.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is the one thing we change. (a) False (b) True
25. 25.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
26. 26.🛟 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
27. 27.🍋 Which of these steps is a job for an adult? (a) reading the message (b) ironing the paper (c) dipping the cotton bud (d) letting the paper dry
28. 28.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the water temperature (b) the amount of water (c) the amount of sugar (d) size of the balloon
29. 29.True or false: lemon juice is not needed for the turmeric test. (a) False (b) True
30. 30.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a rubber band (b) yeast (c) a clear plastic bag (d) a potted plant
31. 31.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “how dark the writing is”? (a) we keep it the same (b) we change it (c) we measure it
32. 32.⚖️ Fair test — do seeds need water to sprout? True or false: the kind of seeds is what we measure. (a) False (b) True
33. 33.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) never put seeds in mouth (b) feed them to pets (c) throw them at friends (d) eat a few to check
34. 34.🍞 Which of these is something yeast does not need? (a) time (b) vinegar (c) warm water (d) sugar
35. 35.🧺 Do we need turmeric powder for the leafy bag test? (a) not needed (b) needed
36. 36.True or false: turmeric powder is needed for the secret lemon message. (a) False (b) True
37. 37.🌱 Which of these does not sprout? (a) boiled seeds (b) seeds on wet cotton (c) wet seeds in the dark (d) wet seeds by a window
38. 38.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of yeast”? (a) we keep it the same (b) we change it (c) we measure it
39. 39.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns blue (c) it turns green (d) reddish-brown
40. 40.🔮 Can the brown writing go back to being invisible? (a) no, it stays brown (b) yes, in the dark (c) yes, if shaken (d) yes, if cooled

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