Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 870 · 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.🛟 The water for the yeast should be ___. (a) ice cold (b) very salty (c) boiling hot (d) warm, not hot
2. 2.True or false: a rubber band is not needed for the leafy bag test. (a) True (b) False
3. 3.🍞 Which of these is something yeast needs? (a) salt (b) sunlight (c) time (d) a magnet
4. 4.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) an adult with an iron (b) a small bowl (c) a magnet (d) lemon juice
5. 5.True or false: cotton wool is needed for sprouting seeds. (a) False (b) True
6. 6.⚖️ 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 sugar
7. 7.True or false: a magnet is not needed for the turmeric test. (a) False (b) True
8. 8.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a battery cell (b) baking soda (c) vinegar (d) an empty bottle
9. 9.⚖️ Fair test — do seeds need water to sprout? What do we do with “wet or dry cotton”? (a) we measure it (b) we change it (c) we keep it the same
10. 10.🛟 Which safety rule fits the fizzy balloon experiment? (a) keep it away from eyes (b) seal it in a glass jar (c) put it in your mouth (d) shake it near your face
11. 11.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) carbon dioxide gas (c) smoke (d) air from outside
12. 12.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is what we measure? (a) the kind of plant (b) sun or shade (c) amount of water drops (d) the time we wait
13. 13.🪴 Which part of a plant does this job: hold the plant in soil? (a) stem (b) flower (c) leaves (d) roots
14. 14.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) how clear the water is (b) the filter material (c) the same muddy water
15. 15.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) sand and pebbles (c) cotton or cloth (d) turmeric powder
16. 16.🛟 Why is a plastic jar a good choice for shaking? (a) it is heavier (b) it is magnetic (c) it is hotter (d) it will not break
17. 17.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) turmeric powder (d) a balloon
18. 18.🫗 Which of these is done by filtering? (a) tea leaves from tea (b) sugar from sugar water (c) small stones from dal (d) chaff from wheat grain
19. 19.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) no, never (b) they melt (c) yes, they sprout (d) they turn to stones
20. 20.🫗 How do we separate sugar from sugar water? (a) sieving (b) winnowing (c) filtering (d) evaporating
21. 21.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) sugar (d) a mirror
22. 22.True or false: yeast is needed for the leafy bag test. (a) False (b) True
23. 23.🧺 Do we need a jar with a tight lid for making butter? (a) needed (b) not needed
24. 24.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) nobody needs to (c) a friend who is running (d) the youngest child
25. 25.🧺 Do we need a potted plant for the leafy bag test? (a) not needed (b) needed
26. 26.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) put it in your mouth (c) keep it for a month (d) throw it at a wall
27. 27.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) wet or dry cotton (b) how many seeds sprout (c) the same place
28. 28.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a potted plant (b) a few hours (c) a rubber band (d) vinegar
29. 29.True or false: an adult with an iron is not needed for the secret lemon message. (a) True (b) False
30. 30.🧺 Which of these is needed for sprouting seeds? (a) a small bowl (b) a magnet (c) turmeric powder (d) yeast
31. 31.🌱 Will these sprout: wet seeds in the dark? (a) does not sprout (b) sprouts
32. 32.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a balloon (b) a few days (c) water (d) a small bowl
33. 33.🎈 Why does the balloon blow up? (a) vinegar is hot (b) outside air gets in (c) gas is made inside (d) the bottle shrinks
34. 34.🧺 Do we need a battery cell for sprouting seeds? (a) not needed (b) needed
35. 35.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) no, salt passes through (b) it turns to sand (c) it turns to sugar (d) yes, all of it
36. 36.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is kept the same. (a) False (b) True
37. 37.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is what we measure. (a) False (b) True
38. 38.🧺 Which of these is not needed for the fizzy balloon? (a) vinegar (b) a funnel or spoon (c) a tray for spills (d) a battery cell
39. 39.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) bigger crystals (c) no crystals (d) liquid crystals
40. 40.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) plain water (d) detergent water

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