Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 626 · 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.🫗 How do we separate tea leaves from tea? (a) filtering (b) evaporating (c) winnowing (d) handpicking
2. 2.🛟 The water for the yeast should be ___. (a) warm, not hot (b) very salty (c) ice cold (d) boiling hot
3. 3.🧺 Which of these is needed for the muddy water filter? (a) a mirror (b) a magnet (c) a funnel (d) a battery cell
4. 4.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same funnel”? (a) we measure it (b) we change it (c) we keep it the same
5. 5.🫧 Is salt water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
6. 6.🛟 How should the plastic bag be tied around the branch? (a) as tight as possible (b) with sharp wire (c) gently, not too tight (d) with a hot glue gun
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) False (b) True
8. 8.🔍 Which is the odd one out? (a) baking soda (b) sawdust (c) sugar (d) glucose powder
9. 9.🍋 Which of these steps is a job a child can do? (a) cutting the lemon (b) putting the iron away (c) reading the message (d) ironing the paper
10. 10.🔍 Which is the odd one out? (a) vinegar (b) lemon juice (c) tamarind water (d) soap solution
11. 11.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) melting butter (c) melting ice (d) dissolving salt
12. 12.True or false: an adult with an iron is not needed for the secret lemon message. (a) True (b) False
13. 13.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) there is no change (b) it turns blue (c) it shrinks (d) it grows bigger
14. 14.True or false: yeast is not needed for the secret lemon message. (a) True (b) False
15. 15.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) a balloon (c) a cotton bud (d) lemon juice
16. 16.🛟 Which safety rule fits the fizzy balloon experiment? (a) seal it in a glass jar (b) keep it away from eyes (c) put it in your mouth (d) shake it near your face
17. 17.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) few or no crystals (c) it fizzes (d) crystals grow faster
18. 18.🧺 Which of these is not needed for the leafy bag test? (a) a potted plant (b) a few hours (c) a clear plastic bag (d) yeast
19. 19.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it bursts at once (c) it grows much faster (d) it turns yellow
20. 20.🍋 Which of these steps is a job for an adult? (a) dipping the cotton bud (b) letting the paper dry (c) cutting the lemon (d) writing the message
21. 21.⚖️ Fair test — do seeds need water to sprout? True or false: the number of seeds is the one thing we change. (a) True (b) False
22. 22.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a shallow dish (c) turmeric powder (d) salt
24. 24.📘 What do we call something that changes colour to show an acid or a base? (a) a pulley (b) a prism (c) a magnet (d) an indicator
25. 25.🧺 Do we need a balloon for making butter? (a) needed (b) not needed
26. 26.🧺 Which of these is needed for the leafy bag test? (a) a mirror (b) a magnet (c) a clear plastic bag (d) vinegar
27. 27.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a funnel (b) turmeric powder (c) a clean glass (d) cotton or cloth
28. 28.🛟 What should you do if vinegar splashes in your eye? (a) ignore it (b) rinse with clean water (c) add baking soda (d) rub it hard
29. 29.True or false: salt is something yeast needs. (a) False (b) True
30. 30.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) the same dish (c) days to see crystals (d) the kind of salt
31. 31.🔮 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
32. 32.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) sand and pebbles (b) muddy water (c) a balloon (d) a clean glass
33. 33.True or false: a balloon is not needed for the muddy water filter. (a) False (b) True
34. 34.⚖️ 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
35. 35.🍋 Secret message: who does this step — putting the iron away? (a) an adult does it (b) a child can do it
36. 36.🔍 Which is the odd one out? (a) a magnet (b) vinegar (c) sunlight (d) time
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) the amount of salt (b) the kind of salt (c) days to see crystals (d) sunny or shady place
38. 38.🔍 Which is the odd one out? (a) dissolving salt (b) melting butter (c) melting ice (d) cooking an egg
39. 39.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: sun or shade is the one thing we change. (a) False (b) True
40. 40.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the same cotton bud (b) the ironing time (c) the same paper (d) the kind of juice

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