Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 642 · 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.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
2. 2.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is what we measure. (a) False (b) True
3. 3.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) tea stays behind (b) leaves stay behind (c) both stay behind (d) leaves pass through
4. 4.True or false: yeast is not needed for sprouting seeds. (a) True (b) False
5. 5.🧺 Which of these is not needed for the fizzy balloon? (a) baking soda (b) a funnel or spoon (c) a seed (d) vinegar
6. 6.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a battery cell (c) sugar (d) a paper clip
7. 7.🧺 Which of these is not needed for the leafy bag test? (a) a clear plastic bag (b) a potted plant (c) a mirror (d) sunlight
8. 8.⚖️ 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) True (b) False
9. 9.True or false: vinegar is something yeast does not need. (a) True (b) False
10. 10.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a small bottle (c) a balloon (d) a mirror
11. 11.True or false: give out water vapour is a job of the stem. (a) True (b) False
12. 12.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) a small bottle (c) a balloon (d) dry yeast
13. 13.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we keep it the same (b) we change it (c) we measure it
14. 14.🔍 Which is the odd one out? (a) sunlight (b) water (c) salt (d) soil
15. 15.🧺 Which of these is not needed for sprouting seeds? (a) cotton wool (b) a small bowl (c) a battery cell (d) a few days
16. 16.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
17. 17.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the water temperature”? (a) we change it (b) we keep it the same (c) we measure it
18. 18.True or false: a magnet is needed for the turmeric test. (a) False (b) True
19. 19.🔍 Which is the odd one out? (a) folding paper (b) dissolving salt (c) melting butter (d) rusting iron
20. 20.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a few hours (b) a clear plastic bag (c) a potted plant (d) yeast
21. 21.🛟 What should you do after handling muddy water? (a) nothing is needed (b) lick your fingers (c) wash hands afterwards (d) wipe hands on face
22. 22.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
23. 23.🔍 Which is the odd one out? (a) detergent water (b) vinegar (c) lemon juice (d) tamarind water
24. 24.🍋 Which of these steps is a job for an adult? (a) reading the message (b) ironing the paper (c) writing the message (d) dipping the cotton bud
25. 25.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a few days (b) water (c) a magnet (d) cotton wool
26. 26.🛟 Why must a plastic bag never go over anyone’s head? (a) it changes colour (b) it gets wet (c) it is too big (d) it can block breathing
27. 27.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
28. 28.⚖️ 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) amount of water drops (b) sun or shade (c) the size of the plant (d) the time we wait
29. 29.🛟 Why must the jar lid be screwed on tightly? (a) so cream does not spill (b) so it gets hot (c) so it turns yellow (d) so air gets out
30. 30.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) green (c) bright blue (d) white at once
31. 31.⚖️ 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 glass (b) the same muddy water (c) how clear the water is (d) the filter material
32. 32.🫗 Which of these is done by filtering? (a) small stones from dal (b) mud from water (c) bad grains from rice (d) husk from rice grain
33. 33.🫧 Which of these is a base? (a) sugar water (b) vinegar (c) detergent water (d) tamarind water
34. 34.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) yeast (b) muddy water (c) a clean glass (d) a funnel
35. 35.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) safe from small children (d) next to the baby
36. 36.True or false: time is something yeast does not need. (a) True (b) False
37. 37.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “sun or shade”? (a) we keep it the same (b) we change it (c) we measure it
38. 38.🫗 Which of these is done by winnowing? (a) gravel from fine sand (b) husk from rice grain (c) small stones from dal (d) salt from sea water
39. 39.⚖️ Fair test — do seeds need water to sprout? True or false: wet or dry cotton is the one thing we change. (a) False (b) True
40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False

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