Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 221 · 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.🌱 What comes out of a moong seed first when it sprouts? (a) a thorn (b) a flower (c) a fruit (d) a tiny root
2. 2.⚖️ 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 yeast (b) the same bottles (c) the amount of water (d) the water temperature
3. 3.🪴 Which part of a plant does this job: hold up the leaves? (a) stem (b) roots (c) flower (d) leaves
4. 4.True or false: plain water turns turmeric reddish-brown. (a) True (b) False
5. 5.🔮 Can the brown writing go back to being invisible? (a) yes, if cooled (b) yes, in the dark (c) no, it stays brown (d) yes, if shaken
6. 6.🍞 Which of these is something yeast needs? (a) salt (b) sunlight (c) sugar (d) a magnet
7. 7.🧺 Do we need sugar for the fizzy balloon? (a) not needed (b) needed
8. 8.True or false: a tray for spills is needed for the fizzy balloon. (a) True (b) False
9. 9.🧂 Which of these dissolves in water? (a) food colour (b) small pebbles (c) sawdust (d) sand
10. 10.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we measure it (b) we keep it the same (c) we change it
11. 11.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) turmeric powder (c) a small bottle (d) a magnet
12. 12.🔍 Which is the odd one out? (a) plugging in the iron (b) cutting the lemon (c) letting the paper dry (d) ironing the paper
13. 13.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it turns blue (c) reddish-brown (d) it stays yellow
14. 14.🫗 Which of these is done by filtering? (a) mud from water (b) husk from rice grain (c) small stones from dal (d) bad grains from rice
15. 15.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
16. 16.🍋 Secret message: who does this step — cutting the lemon? (a) an adult does it (b) a child can do it
17. 17.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) lemon juice (b) a small bowl (c) a mirror (d) white paper
18. 18.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) next to the baby (d) safe from small children
19. 19.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is kept the same. (a) True (b) False
20. 20.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) bigger crystals (c) no crystals (d) smaller crystals
21. 21.True or false: white paper is not needed for the secret lemon message. (a) False (b) True
22. 22.🫗 How do we separate bad grains from rice? (a) filtering (b) handpicking (c) winnowing (d) sieving
23. 23.⚖️ 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 same kind of bag (b) sun or shade (c) amount of water drops
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 same muddy water (b) the filter material (c) the same glass (d) the same funnel
25. 25.⚖️ 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 kind of salt (b) days to see crystals (c) the amount of water (d) sunny or shady place
26. 26.True or false: turmeric powder is not needed for the muddy water filter. (a) False (b) True
27. 27.🌱 Will these sprout: wet seeds in the dark? (a) does not sprout (b) sprouts
28. 28.True or false: a balloon is needed for the turmeric test. (a) False (b) True
29. 29.🛟 Why must the jar lid be screwed on tightly? (a) so it turns yellow (b) so it gets hot (c) so cream does not spill (d) so air gets out
30. 30.🛟 What should you do if vinegar splashes in your eye? (a) add baking soda (b) rub it hard (c) ignore it (d) rinse with clean water
31. 31.True or false: a balloon is not needed for the fizzy balloon. (a) False (b) True
32. 32.🧺 Do we need cotton wool for sprouting seeds? (a) not needed (b) needed
33. 33.🫗 How do we separate gravel from fine sand? (a) filtering (b) evaporating (c) winnowing (d) sieving
34. 34.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it turns sweet (c) crystals grow faster (d) it fizzes
35. 35.🛟 Which safety rule fits the fizzy balloon experiment? (a) put it in your mouth (b) keep it away from eyes (c) seal it in a glass jar (d) shake it near your face
36. 36.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) neutral (c) an acid
37. 37.🍋 Which of these steps is a job a child can do? (a) putting the iron away (b) dipping the cotton bud (c) cutting the lemon (d) ironing the paper
38. 38.🪴 Where did the water inside the bag come from? (a) the plastic (b) the leaves (c) the rain (d) the rubber band
39. 39.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we change it (b) we keep it the same (c) we measure it
40. 40.🔍 Which is the odd one out? (a) sugar (b) table salt (c) sand (d) baking soda

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