Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 56 · 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.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we measure it (b) we keep it the same (c) we change it
2. 2.🫧 Which of these is a base? (a) curd (b) tamarind water (c) soap solution (d) salt water
3. 3.True or false: a magnet is something yeast needs. (a) True (b) False
4. 4.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) salt grows roots (c) water evaporates (d) the dish melts
5. 5.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) lemon juice (c) soap solution (d) sugar water
6. 6.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the amount poured is kept the same. (a) True (b) False
7. 7.🛟 What should you do after handling muddy water? (a) lick your fingers (b) wash hands afterwards (c) nothing is needed (d) wipe hands on face
8. 8.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it grows faster (c) it glows (d) the yeast is killed
9. 9.True or false: a battery cell is not needed for the muddy water filter. (a) False (b) True
10. 10.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the kind of balloon is kept the same. (a) True (b) False
11. 11.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the water temperature (b) size of the balloon (c) the amount of yeast (d) the amount of water
12. 12.True or false: make seeds is a job of the flower. (a) False (b) True
13. 13.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) spoons of baking soda (b) size of the balloon (c) the kind of balloon
14. 14.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we measure it (b) we keep it the same (c) we change it
15. 15.🌱 Is sugar needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
16. 16.🧺 Which of these is not needed for sprouting seeds? (a) a magnet (b) a small bowl (c) a few days (d) moong seeds
17. 17.🌱 Is water needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
18. 18.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is what we measure. (a) True (b) False
19. 19.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they grow fruit (b) they sprout faster (c) they do not sprout (d) they glow
20. 20.🌱 Is sunlight needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
21. 21.True or false: soap solution is needed for the turmeric test. (a) False (b) True
22. 22.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the time we wait is what we measure. (a) False (b) True
23. 23.🧺 Which of these is not needed for making butter? (a) fresh cream (b) a timer (c) turmeric powder (d) cold water to rinse
24. 24.🔍 Which is the odd one out? (a) air (b) salt (c) warmth (d) water
25. 25.🍋 Secret message: who does this step — reading the message? (a) an adult does it (b) a child can do it
26. 26.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
27. 27.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same muddy water is what we measure. (a) False (b) True
28. 28.🫧 Is salt water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) a battery cell (d) a small bottle
30. 30.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
31. 31.🧂 Which of these does not dissolve in water? (a) food colour (b) table salt (c) sugar (d) cooking oil
32. 32.🧺 Do we need a bowl for making butter? (a) needed (b) not needed
33. 33.🫗 Which of these is done by sieving? (a) tea leaves from tea (b) mud from water (c) small stones from dal (d) gravel from fine sand
34. 34.True or false: vinegar is needed for the leafy bag test. (a) False (b) True
35. 35.True or false: a battery cell is needed for making butter. (a) True (b) False
36. 36.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we measure it (b) we keep it the same (c) we change it
37. 37.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a few hours (b) a battery cell (c) a potted plant (d) sunlight
38. 38.🔮 Predict: the jar is filled right to the top with cream. What happens? (a) it is much faster (b) it turns pink (c) it makes salt (d) it takes much longer
39. 39.True or false: yeast is not needed for the leafy bag test. (a) True (b) False
40. 40.🧺 Do we need a mirror for the muddy water filter? (a) not needed (b) needed

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