Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 230 · 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.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) yes, all of it (b) no, salt passes through (c) it turns to sugar (d) it turns to sand
2. 2.🧺 Do we need a potted plant for the leafy bag test? (a) needed (b) not needed
3. 3.🫧 Is vinegar an acid, a base or neutral? (a) a base (b) an acid (c) neutral
4. 4.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) plain water (d) detergent water
5. 5.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it shrinks (b) there is no change (c) it turns blue (d) it grows bigger
6. 6.True or false: boiled seeds sprouts in a few days. (a) True (b) False
7. 7.🫗 How do we separate mud from water? (a) handpicking (b) winnowing (c) evaporating (d) filtering
8. 8.🧺 Which of these is not needed for the secret lemon message? (a) white paper (b) a balloon (c) a small bowl (d) an adult with an iron
9. 9.📘 What do we call plants giving out water vapour from their leaves? (a) reflection (b) digestion (c) transpiration (d) germination
10. 10.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we measure it (b) we keep it the same (c) we change it
11. 11.True or false: a battery cell is not needed for growing salt crystals. (a) True (b) False
12. 12.🫧 Which of these is an acid? (a) plain water (b) vinegar (c) soap solution (d) baking soda water
13. 13.🍋 Which of these steps is a job for an adult? (a) reading the message (b) writing the message (c) letting the paper dry (d) cutting the lemon
14. 14.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) soap solution (c) a magnet (d) water
15. 15.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it bursts at once (c) it grows very little (d) it grows much faster
16. 16.🔍 Which is the odd one out? (a) sugar water (b) lemon juice (c) baking soda water (d) tamarind water
17. 17.🛟 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
18. 18.🧺 Do we need lemon juice for the secret lemon message? (a) not needed (b) needed
19. 19.🛟 Why must a plastic bag never go over anyone’s head? (a) it can block breathing (b) it gets wet (c) it is too big (d) it changes colour
20. 20.🧺 Which of these is needed for the muddy water filter? (a) muddy water (b) a battery cell (c) a balloon (d) yeast
21. 21.🫗 How do we separate bran from wheat flour? (a) filtering (b) winnowing (c) handpicking (d) sieving
22. 22.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) clearer (b) salty (c) hot (d) muddier
23. 23.🧺 Do we need vinegar for the fizzy balloon? (a) not needed (b) needed
24. 24.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
25. 25.True or false: time is something yeast needs. (a) False (b) True
26. 26.True or false: bad grains from rice is done by winnowing. (a) True (b) False
27. 27.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same cotton bud is kept the same. (a) False (b) True
28. 28.🫗 How do we separate chaff from wheat grain? (a) winnowing (b) filtering (c) sieving (d) handpicking
29. 29.🧺 Which of these is not needed for the yeast balloon? (a) a paper clip (b) dry yeast (c) a small bottle (d) sugar
30. 30.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
31. 31.⚖️ 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) the size of the plant (b) sun or shade (c) amount of water drops
32. 32.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) your best clothes (c) a white party dress (d) an old shirt or apron
33. 33.🧺 Which of these is needed for the leafy bag test? (a) vinegar (b) a battery cell (c) a potted plant (d) a magnet
34. 34.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) carbon dioxide gas (c) smoke (d) steam
35. 35.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold makes it pink (c) cold slows yeast down (d) cold kills sugar
36. 36.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is the one thing we change. (a) True (b) False
37. 37.🫗 How do we separate gravel from fine sand? (a) winnowing (b) filtering (c) handpicking (d) sieving
38. 38.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the same cotton bud (b) the kind of juice (c) the same paper (d) how dark the writing is
39. 39.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we keep it the same (b) we measure it (c) we change it
40. 40.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we keep it the same (b) we measure it (c) we change it

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