Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 868 · 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.🛟 The water for the yeast should be ___. (a) warm, not hot (b) ice cold (c) boiling hot (d) very salty
2. 2.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it floats on top (b) it sinks to the bottom (c) it turns to sand (d) it dissolves
3. 3.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False
5. 5.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) detergent water (c) sugar water (d) baking soda water
6. 6.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) in a busy doorway (d) next to the baby
7. 7.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the amount of cream is what we measure. (a) True (b) False
8. 8.🫧 Which of these is an acid? (a) curd (b) baking soda water (c) plain water (d) sugar water
9. 9.⚖️ Fair test — do seeds need water to sprout? True or false: the number of seeds is kept the same. (a) False (b) True
10. 10.🫗 Why does filtered muddy water look clearer? (a) the water evaporates (b) the filter adds soap (c) the filter traps mud (d) the mud dissolves
11. 11.🛟 Which safety rule fits the fizzy balloon experiment? (a) put it in your mouth (b) seal it in a glass jar (c) keep it away from eyes (d) shake it near your face
12. 12.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it turns blue (c) reddish-brown (d) it stays yellow
13. 13.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
14. 14.True or false: a magnet is not needed for making butter. (a) False (b) True
15. 15.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) throw them at friends (b) feed them to pets (c) never put seeds in mouth (d) eat a few to check
16. 16.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) yes, all of it (b) it turns to sugar (c) no, salt passes through (d) it turns to sand
17. 17.🔮 Predict: the jar is filled right to the top with cream. What happens? (a) it turns pink (b) it is much faster (c) it takes much longer (d) it makes salt
18. 18.⚖️ 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 measure it (c) we keep it the same
19. 19.🫗 How do we separate small stones from dal? (a) winnowing (b) evaporating (c) handpicking (d) filtering
20. 20.🧺 Which of these is needed for the leafy bag test? (a) turmeric powder (b) a battery cell (c) a potted plant (d) a magnet
21. 21.🍞 Which of these is something yeast does not need? (a) sunlight (b) warm water (c) time (d) sugar
22. 22.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
23. 23.🍞 Which of these is something yeast needs? (a) vinegar (b) warm water (c) salt (d) sunlight
24. 24.🍋 Which of these steps is a job for an adult? (a) letting the paper dry (b) dipping the cotton bud (c) putting the iron away (d) reading the message
25. 25.🔍 Which is the odd one out? (a) cooking an egg (b) rusting iron (c) melting ice (d) browning lemon ink
26. 26.🪴 Which part of a plant does this job: carry water upward? (a) roots (b) stem (c) leaves (d) flower
27. 27.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
28. 28.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
29. 29.🍋 Secret message: who does this step — cutting the lemon? (a) a child can do it (b) an adult does it
30. 30.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the time we wait”? (a) we measure it (b) we keep it the same (c) we change it
31. 31.True or false: make seeds is a job of the leaves. (a) True (b) False
32. 32.🧺 Do we need a potted plant for the leafy bag test? (a) needed (b) not needed
33. 33.True or false: plain water turns turmeric reddish-brown. (a) True (b) False
34. 34.🛟 Why must the jar lid be screwed on tightly? (a) so it turns yellow (b) so air gets out (c) so cream does not spill (d) so it gets hot
35. 35.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the salt (b) nothing (c) the mud (d) the water
36. 36.🧈 Which of these is a change that can be undone? (a) folding paper (b) cooking an egg (c) rusting iron (d) milk turning to curd
37. 37.🧺 Which of these is not needed for making butter? (a) a bowl (b) a jar with a tight lid (c) a timer (d) a balloon
38. 38.🍋 Secret message: who does this step — dipping the cotton bud? (a) an adult does it (b) a child can do it
39. 39.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we measure it (b) we change it (c) we keep it the same
40. 40.🫧 Is detergent water an acid, a base or neutral? (a) neutral (b) a base (c) an acid

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