Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 479 · 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 is the odd one out? (a) baking soda water (b) detergent water (c) lemon juice (d) soap solution
2. 2.🫧 Is detergent water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
3. 3.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the cream temperature”? (a) we measure it (b) we change it (c) we keep it the same
4. 4.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a mirror (b) vinegar (c) baking soda (d) a balloon
5. 5.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is kept the same. (a) False (b) True
6. 6.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) size of the balloon (b) spoons of baking soda (c) the same bottle
7. 7.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is the one thing we change? (a) the amount of sugar (b) the same bottles (c) the amount of water (d) the water temperature
8. 8.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we measure it (b) we keep it the same (c) we change it
9. 9.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a battery cell (b) a clear plastic bag (c) a rubber band (d) a potted plant
10. 10.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) almost nothing (b) dark brown words (c) blue words (d) a rainbow
11. 11.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
12. 12.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) a piece of string (c) salt (d) a shallow dish
13. 13.🍋 Secret message: who does this step — writing the message? (a) an adult does it (b) a child can do it
14. 14.🧺 Do we need turmeric powder for the leafy bag test? (a) needed (b) not needed
15. 15.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a comb (c) a small bottle (d) dry yeast
16. 16.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is the one thing we change. (a) True (b) False
17. 17.🍞 Which of these is something yeast needs? (a) sugar (b) sunlight (c) salt (d) a magnet
18. 18.🟡 Which of these keeps turmeric yellow? (a) lemon juice (b) detergent water (c) soap solution (d) baking soda water
19. 19.🛟 How should the plastic bag be tied around the branch? (a) with a hot glue gun (b) as tight as possible (c) with sharp wire (d) gently, not too tight
20. 20.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) pour it down the sink (c) keep it for a month (d) put it in your mouth
21. 21.🛟 Why should you never drink water just because it looks clear? (a) clear water is hot (b) germs are invisible (c) clear water is sweet (d) clear water is salty
22. 22.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we change it (b) we measure it (c) we keep it the same
23. 23.🌱 Is soil needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
24. 24.⚖️ 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) sun or shade (c) the kind of plant (d) amount of water drops
25. 25.⚖️ 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) the amount of vinegar (d) spoons of baking soda
26. 26.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a small bottle (c) turmeric powder (d) a paper clip
27. 27.True or false: salt is needed for growing salt crystals. (a) True (b) False
28. 28.🧺 Which of these is not needed for the leafy bag test? (a) a few hours (b) a rubber band (c) vinegar (d) a clear plastic bag
29. 29.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the ironing time is the one thing we change. (a) True (b) False
30. 30.🫗 How do we separate chaff from wheat grain? (a) filtering (b) handpicking (c) winnowing (d) evaporating
31. 31.🛟 The water for the yeast should be ___. (a) ice cold (b) very salty (c) boiling hot (d) warm, not hot
32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we keep it the same (b) we measure it (c) we change it
33. 33.🫧 Which of these is neutral? (a) salt water (b) vinegar (c) tamarind water (d) curd
34. 34.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it shrinks (b) there is no change (c) it grows bigger (d) it turns blue
35. 35.🛟 What should you do after touching soil or seeds? (a) lick your fingers (b) wash your hands (c) skip washing (d) rub your eyes
36. 36.True or false: sand and pebbles is not needed for the muddy water filter. (a) True (b) False
37. 37.⚖️ Fair test — do seeds need water to sprout? True or false: how many seeds sprout is what we measure. (a) False (b) True
38. 38.🫧 Which of these is neutral? (a) tamarind water (b) vinegar (c) soap solution (d) plain water
39. 39.True or false: wet seeds in the dark sprouts in a few days. (a) True (b) False
40. 40.🍋 Secret message: who does this step — ironing the paper? (a) a child can do it (b) an adult does it

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids