Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 13 · 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.🫗 Which of these is done by handpicking? (a) bad grains from rice (b) gravel from fine sand (c) salt from sea water (d) bran from wheat flour
2. 2.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
3. 3.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) size of the balloon (b) the amount of vinegar (c) spoons of baking soda (d) the kind of balloon
4. 4.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a jar with a tight lid (b) a bowl (c) fresh cream (d) yeast
5. 5.🫧 Is baking soda water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
6. 6.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) yeast (b) a clear plastic bag (c) a rubber band (d) sunlight
7. 7.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same glass is kept the same. (a) False (b) True
8. 8.🪴 Where did the water inside the bag come from? (a) the plastic (b) the rain (c) the leaves (d) the rubber band
9. 9.True or false: a comb is needed for the turmeric test. (a) False (b) True
10. 10.True or false: a magnet is needed for the muddy water filter. (a) True (b) False
11. 11.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) smoke (c) steam (d) carbon dioxide gas
12. 12.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it grows bigger (b) there is no change (c) it shrinks (d) it turns blue
13. 13.⚖️ Fair test — do seeds need water to sprout? What do we do with “the kind of seeds”? (a) we keep it the same (b) we change it (c) we measure it
14. 14.🧈 Which of these is a change that can be undone? (a) rusting iron (b) cooking an egg (c) melting butter (d) baking a cake
15. 15.🫧 Which of these is neutral? (a) tamarind water (b) lemon juice (c) curd (d) sugar water
16. 16.🛟 Which safety rule fits the fizzy balloon experiment? (a) put it in your mouth (b) seal it in a glass jar (c) shake it near your face (d) keep it away from eyes
17. 17.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) no, salt passes through (b) it turns to sugar (c) it turns to sand (d) yes, all of it
18. 18.🔍 Which is the odd one out? (a) salt (b) soil (c) water (d) sugar
19. 19.🧂 Which of these does not dissolve in water? (a) chalk powder (b) glucose powder (c) baking soda (d) food colour
20. 20.True or false: a mirror is needed for the muddy water filter. (a) True (b) False
21. 21.⚖️ 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
22. 22.True or false: vinegar is needed for the fizzy balloon. (a) True (b) False
23. 23.⚖️ 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 kind of plant (d) sun or shade
24. 24.🫗 Is filtered pond water safe to drink? (a) yes, always (b) yes, if it is cold (c) yes, if it is clear (d) no, germs may stay
25. 25.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) the amount of cream (b) the same jar (c) the cream temperature (d) time to make butter
26. 26.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) turmeric powder (c) a battery cell (d) white paper strips
27. 27.📘 What do we call a seed starting to grow? (a) evaporation (b) germination (c) pollination (d) condensation
28. 28.🧺 Do we need moong seeds for sprouting seeds? (a) needed (b) not needed
29. 29.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the water temperature (c) the amount of yeast
30. 30.True or false: sugar is needed for the yeast balloon. (a) True (b) False
31. 31.True or false: a tray for spills is not needed for the fizzy balloon. (a) False (b) True
32. 32.🛟 What should you do after touching soil or seeds? (a) skip washing (b) rub your eyes (c) wash your hands (d) lick your fingers
33. 33.True or false: melting butter is a change that cannot be undone. (a) False (b) True
34. 34.True or false: a few hours is needed for the leafy bag test. (a) False (b) True
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) salt (c) a piece of string (d) a spoon
36. 36.🔍 Which is the odd one out? (a) sunlight (b) water (c) air (d) warmth
37. 37.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) sugar (c) a magnet (d) dry yeast
38. 38.🔍 Which is the odd one out? (a) water (b) warmth (c) air (d) sugar
39. 39.True or false: soap solution is a base. (a) False (b) True
40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we measure it (c) we keep it the same

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