Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 118 · 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: vinegar is a base. (a) True (b) False
2. 2.🔍 Which is the odd one out? (a) food colour (b) sand (c) baking soda (d) glucose powder
3. 3.True or false: a potted plant is needed for the leafy bag test. (a) False (b) True
4. 4.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) frozen (c) magnetic (d) saturated
5. 5.🍋 Why can’t you see the lemon writing once it dries? (a) it turned into air (b) the paper ate it (c) dry juice is see-through (d) the ink is magnetic
6. 6.🧺 Which of these is needed for the leafy bag test? (a) vinegar (b) yeast (c) a clear plastic bag (d) a mirror
7. 7.True or false: table salt does not dissolve in water. (a) True (b) False
8. 8.True or false: warm water is something yeast needs. (a) False (b) True
9. 9.🛟 The water for the yeast should be ___. (a) boiling hot (b) very salty (c) ice cold (d) warm, not hot
10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) a balloon (d) a magnet
11. 11.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
12. 12.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same muddy water is kept the same. (a) True (b) False
13. 13.True or false: warm water is needed for the yeast balloon. (a) False (b) True
14. 14.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) it turns to bread (c) the balloon is smaller (d) the balloon is bigger
15. 15.📘 The browning of lemon juice with heat is a ___ change. (a) physical (b) musical (c) magnetic (d) chemical
16. 16.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: how hard we shake is kept the same. (a) True (b) False
17. 17.True or false: a paper clip is needed for the yeast balloon. (a) False (b) True
18. 18.True or false: a battery cell is needed for the muddy water filter. (a) True (b) False
19. 19.🛟 Which safety rule fits the fizzy balloon experiment? (a) seal it in a glass jar (b) keep it away from eyes (c) shake it near your face (d) put it in your mouth
20. 20.True or false: a funnel is not needed for the muddy water filter. (a) False (b) True
21. 21.🧺 Do we need a funnel for the muddy water filter? (a) not needed (b) needed
22. 22.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) the filter material (b) the same muddy water (c) how clear the water is
23. 23.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
24. 24.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the same jar”? (a) we keep it the same (b) we change it (c) we measure it
25. 25.True or false: take in water from soil is a job of the roots. (a) False (b) True
26. 26.🧺 Which of these is not needed for the muddy water filter? (a) muddy water (b) a funnel (c) a clean glass (d) yeast
27. 27.🔍 Which is the odd one out? (a) plugging in the iron (b) reading the message (c) putting the iron away (d) cutting the lemon
28. 28.🧺 Which of these is not needed for the secret lemon message? (a) white paper (b) a cotton bud (c) a small bowl (d) a magnet
29. 29.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) sunlight (b) a clear plastic bag (c) a potted plant (d) turmeric powder
30. 30.🛟 Why must children keep their fingers away from the iron? (a) it is magnetic (b) it is sticky (c) it is cold (d) it can burn skin
31. 31.🌱 Which of these is needed for a seed to sprout? (a) soil (b) sunlight (c) salt (d) water
32. 32.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) yeast (c) a magnet (d) soap solution
33. 33.🍞 Why do we add sugar to the yeast? (a) to colour it (b) to make it sweet (c) to make it heavy (d) it is food for yeast
34. 34.True or false: seeds in the freezer sprouts in a few days. (a) False (b) True
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) salt (d) a balloon
36. 36.🫗 How do we separate tea leaves from tea? (a) sieving (b) winnowing (c) handpicking (d) filtering
37. 37.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the salt (b) the mud (c) the water (d) nothing
38. 38.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it wilts and droops (b) it flowers more (c) it turns blue (d) it grows faster
39. 39.🍞 Which of these is something yeast needs? (a) vinegar (b) salt (c) time (d) sunlight
40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the turmeric paper (b) the colour we see (c) the liquid we test

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