Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 916 · 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.True or false: a small bowl is needed for sprouting seeds. (a) True (b) False
2. 2.🛟 Which safety rule fits the fizzy balloon experiment? (a) put it in your mouth (b) seal it in a glass jar (c) keep it away from eyes (d) shake it near your face
3. 3.🧺 Do we need yeast for making butter? (a) needed (b) not needed
4. 4.🧺 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) turmeric powder (d) a cotton bud
5. 5.True or false: salt water keeps turmeric yellow. (a) False (b) True
6. 6.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we change it (b) we measure it (c) we keep it the same
7. 7.True or false: a balloon is not needed for making butter. (a) False (b) True
8. 8.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of yeast”? (a) we change it (b) we measure it (c) we keep it the same
9. 9.🔍 Which is the odd one out? (a) dipping the cotton bud (b) letting the paper dry (c) putting the iron away (d) writing the message
10. 10.⚖️ Fair test — do seeds need water to sprout? True or false: the kind of seeds is kept the same. (a) True (b) False
11. 11.⚖️ Fair test — do seeds need water to sprout? What do we do with “how many seeds sprout”? (a) we keep it the same (b) we measure it (c) we change it
12. 12.True or false: fresh cream is needed for making butter. (a) True (b) False
13. 13.True or false: vinegar is not needed for the leafy bag test. (a) False (b) True
14. 14.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a magnet (c) lemon juice (d) white paper strips
15. 15.True or false: white paper is not needed for the secret lemon message. (a) False (b) True
16. 16.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the same bottle”? (a) we measure it (b) we change it (c) we keep it the same
17. 17.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a battery cell (b) white paper strips (c) lemon juice (d) turmeric powder
18. 18.🛟 What should you do after handling muddy water? (a) wipe hands on face (b) lick your fingers (c) wash hands afterwards (d) nothing is needed
19. 19.True or false: a comb is needed for the fizzy balloon. (a) True (b) False
20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we keep it the same (c) we measure it
21. 21.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) size of the balloon (c) the amount of sugar
22. 22.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) how dark the writing is (b) the same paper (c) the same cotton bud (d) the kind of juice
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) sun or shade (c) the kind of plant (d) amount of water drops
24. 24.🫗 Which of these is done by winnowing? (a) gravel from fine sand (b) small stones from dal (c) husk from rice grain (d) bad grains from rice
25. 25.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “amount of water drops”? (a) we measure it (b) we keep it the same (c) we change it
26. 26.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it turns blue (c) it turns yellow again (d) it disappears
27. 27.🧺 Which of these is needed for sprouting seeds? (a) a battery cell (b) water (c) turmeric powder (d) a magnet
28. 28.🧺 Which of these is needed for the muddy water filter? (a) turmeric powder (b) a magnet (c) sand and pebbles (d) a battery cell
29. 29.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the filter material (b) the amount poured (c) the same funnel (d) the same muddy water
30. 30.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
31. 31.🧺 Do we need a mirror for the leafy bag test? (a) not needed (b) needed
32. 32.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to colour rice (c) to clean floors (d) to make bread rise
33. 33.🧺 Which of these is needed for the turmeric test? (a) a comb (b) yeast (c) a magnet (d) lemon juice
34. 34.🌱 Which of these is needed for a seed to sprout? (a) water (b) sunlight (c) sugar (d) soil
35. 35.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “how dark the writing is”? (a) we measure it (b) we keep it the same (c) we change it
36. 36.🧺 Which of these is needed for making butter? (a) a battery cell (b) turmeric powder (c) a balloon (d) a timer
37. 37.🍋 Secret message: who does this step — writing the message? (a) an adult does it (b) a child can do it
38. 38.🌱 Why do the seeds on dry cotton not sprout? (a) they have no soil (b) they have no salt (c) they are too wet (d) they have no water
39. 39.🌱 Which of these is not needed for a seed to sprout? (a) water (b) air (c) warmth (d) sugar
40. 40.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) how dark the writing is (b) the iron setting (c) the kind of juice

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