Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 556 · 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 not needed for the yeast balloon? (a) turmeric powder (b) warm water (c) dry yeast (d) a balloon
2. 2.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) it fills with soil (b) much more water (c) exactly the same (d) much less water
3. 3.True or false: soap solution keeps turmeric yellow. (a) False (b) True
4. 4.True or false: yeast is needed for making butter. (a) False (b) True
5. 5.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “how clear the water is”? (a) we measure it (b) we change it (c) we keep it the same
6. 6.True or false: salt water keeps turmeric yellow. (a) True (b) False
7. 7.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
8. 8.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the ironing time”? (a) we measure it (b) we change it (c) we keep it the same
9. 9.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they sprout faster (b) they glow (c) they do not sprout (d) they grow fruit
10. 10.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the same bottles (b) size of the balloon (c) the amount of sugar (d) the water temperature
11. 11.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) salt (d) warm water
12. 12.True or false: a funnel or spoon is needed for the fizzy balloon. (a) True (b) False
13. 13.🛟 What should you do after handling muddy water? (a) wash hands afterwards (b) lick your fingers (c) wipe hands on face (d) nothing is needed
14. 14.🔮 Predict: the adult irons for only one second. What happens? (a) it gets darker (b) writing turns green (c) the paper floats (d) writing stays faint
15. 15.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) a small bottle (c) a balloon (d) dry yeast
16. 16.True or false: writing the message is a job a child can do. (a) False (b) True
17. 17.🎈 What blows up the balloon in the yeast experiment? (a) carbon dioxide gas (b) smoke (c) air from outside (d) steam
18. 18.⚖️ 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) the time we wait (c) sun or shade (d) the size of the plant
19. 19.True or false: yeast is not needed for the secret lemon message. (a) False (b) True
20. 20.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) turmeric powder (c) warm water (d) a spoon
21. 21.🫧 Which of these is neutral? (a) baking soda water (b) plain water (c) soap solution (d) orange juice
22. 22.🫗 Why does filtered muddy water look clearer? (a) the filter adds soap (b) the filter traps mud (c) the mud dissolves (d) the water evaporates
23. 23.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “amount of water drops”? (a) we change it (b) we keep it the same (c) we measure it
24. 24.🫗 Which of these is done by winnowing? (a) tea leaves from tea (b) bad grains from rice (c) mud from water (d) husk from rice grain
25. 25.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) few or no crystals (c) crystals grow faster (d) it fizzes
26. 26.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) cotton wool (b) a mirror (c) a few days (d) moong seeds
27. 27.🔍 Which is the odd one out? (a) salt (b) time (c) a magnet (d) sunlight
28. 28.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
29. 29.🛟 Why is a plastic jar a good choice for shaking? (a) it is heavier (b) it will not break (c) it is magnetic (d) it is hotter
30. 30.True or false: a small bottle is needed for the yeast balloon. (a) False (b) True
31. 31.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) it turns to sand (b) yes, all of it (c) no, salt passes through (d) it turns to sugar
32. 32.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a clean glass (b) a funnel (c) muddy water (d) a balloon
33. 33.True or false: a mirror is not needed for the yeast balloon. (a) True (b) False
34. 34.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
35. 35.True or false: a funnel is not needed for the muddy water filter. (a) False (b) True
36. 36.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) time to make butter (b) the cream temperature (c) the amount of cream
37. 37.True or false: tamarind water is an acid. (a) False (b) True
38. 38.True or false: a battery cell is not needed for growing salt crystals. (a) False (b) True
39. 39.🛟 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
40. 40.⚖️ 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 same muddy water (c) how clear the water is (d) the amount poured

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