Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 944 · 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: writing the message is a job a child can do. (a) False (b) True
2. 2.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) turmeric powder (c) sugar (d) warm water
3. 3.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
4. 4.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to colour rice (c) to make bread rise (d) to clean floors
5. 5.🧺 Which of these is not needed for the leafy bag test? (a) a clear plastic bag (b) a magnet (c) a potted plant (d) a rubber band
6. 6.🫧 Is tamarind water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we keep it the same (c) we measure it
8. 8.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the amount of sugar (b) the amount of water (c) the same bottles (d) size of the balloon
9. 9.True or false: detergent water is neutral. (a) True (b) False
10. 10.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) pour it down the sink (c) put it in your mouth (d) throw it at a wall
11. 11.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) an empty bottle (b) a funnel or spoon (c) a magnet (d) baking soda
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) the size of the plant (c) amount of water drops
13. 13.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) sugar crystals form (c) salt crystals form (d) it turns to oil
14. 14.🧺 Which of these is needed for the leafy bag test? (a) a mirror (b) a rubber band (c) a battery cell (d) yeast
15. 15.🧺 Do we need a magnet for the fizzy balloon? (a) not needed (b) needed
16. 16.🌱 Will these sprout: wet seeds in the dark? (a) does not sprout (b) sprouts
17. 17.True or false: turmeric powder is not needed for the secret lemon message. (a) True (b) False
18. 18.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) turmeric powder (c) a magnet (d) soap solution
19. 19.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) salty (b) muddier (c) clearer (d) hot
20. 20.True or false: freezing water is a change that cannot be undone. (a) False (b) True
21. 21.🧺 Which of these is not needed for the fizzy balloon? (a) an empty bottle (b) sugar (c) baking soda (d) vinegar
22. 22.🍋 Secret message: who does this step — reading the message? (a) an adult does it (b) a child can do it
23. 23.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny cubes (c) tiny triangles (d) tiny spheres
24. 24.True or false: a jar with a tight lid is needed for making butter. (a) True (b) False
25. 25.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) folding paper (c) baking a cake (d) dissolving salt
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) turmeric powder (d) a piece of string
27. 27.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) how dark the writing is (b) the iron setting (c) the same paper (d) the same cotton bud
28. 28.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) lemon juice (b) a balloon (c) a small bowl (d) a cotton bud
29. 29.🧺 Do we need turmeric powder for the secret lemon message? (a) needed (b) not needed
30. 30.⚖️ 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) how clear the water is (c) the amount poured
31. 31.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
32. 32.True or false: lemon juice is an acid. (a) False (b) True
33. 33.True or false: tamarind water is a base. (a) True (b) False
34. 34.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) a magnet (c) white paper (d) a cotton bud
35. 35.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
36. 36.🌱 Which of these sprouts in a few days? (a) wet seeds in the dark (b) boiled seeds (c) seeds in the freezer (d) seeds on dry cotton
37. 37.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a funnel or spoon (b) a seed (c) baking soda (d) a balloon
38. 38.🫗 Which of these is done by evaporating? (a) husk from rice grain (b) salt from sea water (c) mud from water (d) bad grains from rice
39. 39.🧈 Which tool is used in many Indian homes to churn curd into butter? (a) a sieve (b) a mathani (churner) (c) a pressure cooker (d) a rolling pin
40. 40.🔮 Can the brown writing go back to being invisible? (a) yes, if cooled (b) yes, if shaken (c) yes, in the dark (d) no, it stays brown

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