Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 438 · 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 needed for sprouting seeds? (a) a battery cell (b) yeast (c) water (d) a balloon
2. 2.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
3. 3.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: how clear the water is is what we measure. (a) True (b) False
4. 4.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) white paper (c) lemon juice (d) turmeric powder
5. 5.True or false: sugar is not needed for the fizzy balloon. (a) False (b) True
6. 6.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a mirror (b) sunlight (c) a rubber band (d) a few hours
7. 7.⚖️ 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) amount of water drops (b) sun or shade (c) the same kind of bag
8. 8.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it sinks to the bottom (b) it floats on top (c) it turns to sand (d) it dissolves
9. 9.🌱 Will these sprout: seeds on wet cotton? (a) does not sprout (b) sprouts
10. 10.True or false: sand and pebbles is needed for the muddy water filter. (a) False (b) True
11. 11.🔍 Which is the odd one out? (a) lemon juice (b) vinegar (c) plain water (d) orange juice
12. 12.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny stars (c) tiny cubes (d) tiny spheres
13. 13.🌱 What comes out of a moong seed first when it sprouts? (a) a thorn (b) a flower (c) a tiny root (d) a fruit
14. 14.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
15. 15.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) much more water (b) it fills with soil (c) much less water (d) exactly the same
16. 16.True or false: tea leaves from tea is done by filtering. (a) True (b) False
17. 17.🧺 Do we need yeast for the secret lemon message? (a) needed (b) not needed
18. 18.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
19. 19.🧺 Do we need a funnel or spoon for the fizzy balloon? (a) not needed (b) needed
20. 20.🔍 Which is the odd one out? (a) baking soda water (b) plain water (c) salt water (d) vinegar
21. 21.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is kept the same. (a) False (b) True
22. 22.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a small bowl (b) cotton wool (c) moong seeds (d) yeast
23. 23.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) there is no change (b) it turns blue (c) it grows bigger (d) it shrinks
24. 24.⚖️ 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 same glass (c) the amount poured (d) how clear the water is
25. 25.🫗 Which of these is done by winnowing? (a) husk from rice grain (b) small stones from dal (c) bad grains from rice (d) gravel from fine sand
26. 26.🔍 Which is the odd one out? (a) sawdust (b) small pebbles (c) sand (d) food colour
27. 27.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) they turn to stones (b) no, never (c) yes, they sprout (d) they melt
28. 28.True or false: seeds on wet cotton sprouts in a few days. (a) False (b) True
29. 29.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a magnet (c) white paper strips (d) a battery cell
30. 30.🫗 Which of these is done by evaporating? (a) husk from rice grain (b) sugar from sugar water (c) bran from wheat flour (d) chaff from wheat grain
31. 31.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold slows yeast down (c) cold water is heavy (d) cold makes it pink
32. 32.🛟 Who should use the hot iron in the secret message experiment? (a) whoever is fastest (b) the youngest child (c) any child (d) only an adult
33. 33.🧺 Which of these is needed for the fizzy balloon? (a) sugar (b) a magnet (c) a battery cell (d) a funnel or spoon
34. 34.True or false: wet seeds by a window sprouts in a few days. (a) True (b) False
35. 35.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) reddish-brown (c) it turns green (d) it stays yellow
36. 36.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) a base (c) an acid
37. 37.🪴 Which part of a plant does this job: hold up the leaves? (a) flower (b) leaves (c) stem (d) roots
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) turmeric powder (d) warm water
39. 39.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the amount of cream”? (a) we change it (b) we keep it the same (c) we measure it
40. 40.🧺 Do we need a mirror for sprouting seeds? (a) needed (b) not needed

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