Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 598 · 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: seeds on wet cotton sprouts in a few days. (a) False (b) True
2. 2.🛟 Which safety rule fits the fizzy balloon experiment? (a) keep it away from eyes (b) shake it near your face (c) seal it in a glass jar (d) put it in your mouth
3. 3.⚖️ 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 keep it the same (b) we change it (c) we measure it
4. 4.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) vinegar (c) a mirror (d) a balloon
5. 5.⚖️ 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 keep it the same (c) we change it
6. 6.True or false: cotton wool is not needed for sprouting seeds. (a) True (b) False
7. 7.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the mud (b) the salt (c) the water (d) nothing
8. 8.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) wet or dry cotton (b) the same bowls (c) how many seeds sprout (d) the number of seeds
9. 9.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) the cream temperature (b) how hard we shake (c) the same jar (d) time to make butter
10. 10.⚖️ 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
11. 11.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it grows faster (b) it wilts and droops (c) it flowers more (d) it turns blue
12. 12.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) baking soda water (d) salt water
13. 13.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is the one thing we change. (a) True (b) False
14. 14.🌱 Which of these does not sprout? (a) wet seeds in the dark (b) seeds on wet cotton (c) wet seeds by a window (d) seeds on dry cotton
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) the same dish (b) the kind of salt (c) sunny or shady place (d) the amount of water
16. 16.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) throw them at friends (b) never put seeds in mouth (c) feed them to pets (d) eat a few to check
17. 17.🧺 Do we need a battery cell for making butter? (a) not needed (b) needed
18. 18.True or false: lemon juice is needed for the secret lemon message. (a) False (b) True
19. 19.🔮 Predict: the adult irons for only one second. What happens? (a) writing turns green (b) writing stays faint (c) the paper floats (d) it gets darker
20. 20.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) lemon juice (b) an adult with an iron (c) a cotton bud (d) yeast
21. 21.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the ironing time”? (a) we measure it (b) we keep it the same (c) we change it
22. 22.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a funnel (b) a magnet (c) muddy water (d) a clean glass
23. 23.🧺 Which of these is needed for the fizzy balloon? (a) a seed (b) sugar (c) a comb (d) vinegar
24. 24.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we keep it the same (b) we measure it (c) we change it
25. 25.🧺 Which of these is needed for the muddy water filter? (a) a mirror (b) a balloon (c) a funnel (d) a battery cell
26. 26.True or false: a small bowl is not needed for the secret lemon message. (a) True (b) False
27. 27.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) clearer (b) muddier (c) salty (d) hot
28. 28.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the kind of plant”? (a) we keep it the same (b) we measure it (c) we change it
29. 29.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) sunlight (b) vinegar (c) a potted plant (d) a rubber band
30. 30.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
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) amount of water drops (c) sun or shade
32. 32.True or false: a funnel or spoon is not needed for the fizzy balloon. (a) False (b) True
33. 33.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) white paper strips (c) lemon juice (d) a magnet
34. 34.🧺 Which of these is not needed for the muddy water filter? (a) a funnel (b) a clean glass (c) a battery cell (d) cotton or cloth
35. 35.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the ironing time (b) the same paper (c) how dark the writing is (d) the kind of juice
36. 36.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “how clear the water is”? (a) we keep it the same (b) we change it (c) we measure it
37. 37.True or false: a balloon is needed for making butter. (a) False (b) True
38. 38.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) a mirror (c) a dropper or spoon (d) water
39. 39.True or false: yeast is needed for growing salt crystals. (a) True (b) False
40. 40.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same glass is the one thing we change. (a) False (b) True

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