Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 761 · 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 the leafy bag test. Which one is NOT needed? (a) a battery cell (b) a few hours (c) a clear plastic bag (d) sunlight
2. 2.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is the one thing we change. (a) False (b) True
3. 3.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is kept the same. (a) True (b) False
4. 4.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) soap solution (c) a balloon (d) white paper strips
5. 5.🔮 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
6. 6.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
7. 7.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is kept the same. (a) False (b) True
8. 8.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) the same glass (b) the filter material (c) the same muddy water (d) how clear the water is
9. 9.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the kind of balloon is kept the same. (a) False (b) True
10. 10.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) lemon juice (c) an adult with an iron (d) turmeric powder
11. 11.🧺 Which of these is needed for the leafy bag test? (a) a mirror (b) a magnet (c) turmeric powder (d) a potted plant
12. 12.🔮 The fizzing stops after a while. Why? (a) the gas froze (b) the bottle got tired (c) an ingredient ran out (d) the balloon got cold
13. 13.🧺 Do we need a clear plastic bag for the leafy bag test? (a) not needed (b) needed
14. 14.🧺 Which of these is needed for the leafy bag test? (a) yeast (b) a magnet (c) a rubber band (d) vinegar
15. 15.🍋 What colour does the lemon writing turn when an adult warms it? (a) blue (b) white (c) brown (d) green
16. 16.🪴 Which of these is a job of the leaves? (a) give out water vapour (b) carry water upward (c) hold up the leaves (d) make seeds
17. 17.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) dark green (b) bright red (c) pale yellow (d) blue
18. 18.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
19. 19.🔮 Can the brown writing go back to being invisible? (a) yes, if shaken (b) yes, if cooled (c) no, it stays brown (d) yes, in the dark
20. 20.🔍 Which is the odd one out? (a) curd (b) soap solution (c) tamarind water (d) orange juice
21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we change it (c) we keep it the same
22. 22.🪴 Which part of a plant does this job: carry water upward? (a) leaves (b) stem (c) flower (d) roots
23. 23.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
24. 24.🔍 Which is the odd one out? (a) milk turning to curd (b) rusting iron (c) cooking an egg (d) melting butter
25. 25.🛟 The water for the yeast should be ___. (a) ice cold (b) very salty (c) boiling hot (d) warm, not hot
26. 26.🫗 How do we separate chaff from wheat grain? (a) filtering (b) sieving (c) evaporating (d) winnowing
27. 27.True or false: cooking an egg is a change that can be undone. (a) False (b) True
28. 28.🌱 Which of these sprouts in a few days? (a) boiled seeds (b) seeds in the freezer (c) seeds on dry cotton (d) wet seeds by a window
29. 29.🛟 How should the plastic bag be tied around the branch? (a) with sharp wire (b) gently, not too tight (c) with a hot glue gun (d) as tight as possible
30. 30.True or false: plain water turns turmeric reddish-brown. (a) True (b) False
31. 31.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
32. 32.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the kind of juice (b) how dark the writing is (c) the ironing time
33. 33.🫧 Which of these is neutral? (a) vinegar (b) baking soda water (c) lemon juice (d) plain water
34. 34.🫧 Is baking soda water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
35. 35.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
36. 36.🧺 Which of these is not needed for the muddy water filter? (a) sand and pebbles (b) a funnel (c) a clean glass (d) a balloon
37. 37.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) empty (c) frozen (d) saturated
38. 38.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) feed them to pets (b) throw them at friends (c) never put seeds in mouth (d) eat a few to check
39. 39.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
40. 40.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the same kind of bag”? (a) we measure it (b) we keep it the same (c) we change it

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