Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 891 · 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.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “sun or shade”? (a) we measure it (b) we change it (c) we keep it the same
2. 2.🛟 What should you do after touching soil or seeds? (a) lick your fingers (b) rub your eyes (c) wash your hands (d) skip washing
3. 3.🧺 Do we need a magnet for sprouting seeds? (a) not needed (b) needed
4. 4.True or false: a battery cell is not needed for the secret lemon message. (a) True (b) False
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) turmeric powder (c) salt (d) a shallow dish
6. 6.🧈 Which of these is a change that can be undone? (a) folding paper (b) cooking an egg (c) browning lemon ink (d) rusting iron
7. 7.🔍 What do you see after shaking cream in a jar for a long time? (a) bubbles of gas (b) lumps of butter (c) clear water only (d) sugar crystals
8. 8.🎈 Why does the balloon blow up? (a) the bottle shrinks (b) outside air gets in (c) vinegar is hot (d) gas is made inside
9. 9.True or false: soap solution turns turmeric reddish-brown. (a) False (b) True
10. 10.🫗 How do we separate small stones from dal? (a) evaporating (b) handpicking (c) sieving (d) winnowing
11. 11.True or false: rusting iron is a change that can be undone. (a) False (b) True
12. 12.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the same bottle (b) the kind of balloon (c) spoons of baking soda (d) size of the balloon
13. 13.🧺 Which of these is not needed for the leafy bag test? (a) a potted plant (b) a rubber band (c) a battery cell (d) a clear plastic bag
14. 14.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
15. 15.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) soap solution (d) plain water
16. 16.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the kind of balloon is what we measure. (a) False (b) True
17. 17.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the amount poured”? (a) we change it (b) we keep it the same (c) we measure it
18. 18.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) a base (c) neutral
19. 19.🛟 Why must the jar lid be screwed on tightly? (a) so it gets hot (b) so air gets out (c) so cream does not spill (d) so it turns yellow
20. 20.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same place”? (a) we measure it (b) we keep it the same (c) we change it
21. 21.True or false: cooking an egg is a change that cannot be undone. (a) True (b) False
22. 22.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) safe from small children (c) next to the baby (d) on the edge of a table
23. 23.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to make bread rise (c) to wash dishes (d) to clean floors
24. 24.🧺 Do we need a magnet for the secret lemon message? (a) needed (b) not needed
25. 25.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) it turns to butter (c) sugar crystals form (d) salt crystals form
26. 26.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) the same bottle (b) spoons of baking soda (c) the amount of vinegar (d) size of the balloon
27. 27.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) dark green (b) bright red (c) blue (d) pale yellow
28. 28.True or false: sugar from sugar water is done by evaporating. (a) False (b) True
29. 29.🧺 Do we need a magnet for the muddy water filter? (a) needed (b) not needed
30. 30.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) throw it at a wall (c) pour it down the sink (d) put it in your mouth
31. 31.⚖️ Fair test — do seeds need water to sprout? True or false: wet or dry cotton is kept the same. (a) True (b) False
32. 32.⚖️ 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 keep it the same (b) we measure it (c) we change it
33. 33.🛟 What should you do after handling muddy water? (a) wipe hands on face (b) nothing is needed (c) wash hands afterwards (d) lick your fingers
34. 34.⚖️ 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 amount of yeast
35. 35.True or false: tamarind water is an acid. (a) False (b) True
36. 36.⚖️ 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 size of the plant (b) amount of water drops (c) the time we wait (d) sun or shade
37. 37.True or false: melting ice is a change that can be undone. (a) False (b) True
38. 38.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) yeast (c) a dropper or spoon (d) white paper strips
39. 39.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) an adult with an iron (c) white paper (d) turmeric powder
40. 40.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we change it (b) we measure it (c) we keep it the same

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