Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 178 · 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 — does a cloth filter or a cotton filter give clearer water? What do we do with “the amount poured”? (a) we change it (b) we measure it (c) we keep it the same
2. 2.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
3. 3.🧺 Which of these is not needed for the turmeric test? (a) a magnet (b) water (c) soap solution (d) a dropper or spoon
4. 4.🛟 Why is a plastic jar a good choice for shaking? (a) it will not break (b) it is hotter (c) it is magnetic (d) it is heavier
5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the colour we see (b) the turmeric paper (c) the light we look in (d) the number of drops
6. 6.🧺 Which of these is not needed for sprouting seeds? (a) a few days (b) a small bowl (c) a magnet (d) moong seeds
7. 7.🛟 How should the plastic bag be tied around the branch? (a) gently, not too tight (b) as tight as possible (c) with a hot glue gun (d) with sharp wire
8. 8.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) water (c) a mirror (d) a dropper or spoon
9. 9.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
10. 10.🍋 Why can’t you see the lemon writing once it dries? (a) dry juice is see-through (b) the ink is magnetic (c) it turned into air (d) the paper ate it
11. 11.🌱 Will these sprout: seeds in the freezer? (a) sprouts (b) does not sprout
12. 12.🫗 How do we separate salt from sea water? (a) filtering (b) sieving (c) evaporating (d) winnowing
13. 13.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the iron setting (b) the same cotton bud (c) the kind of juice (d) how dark the writing is
14. 14.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
15. 15.🧺 Which of these is needed for making butter? (a) a balloon (b) a battery cell (c) fresh cream (d) a magnet
16. 16.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) the amount of cream (b) the same jar (c) time to make butter (d) the cream temperature
17. 17.🔍 Which is the odd one out? (a) tamarind water (b) soap solution (c) orange juice (d) vinegar
18. 18.True or false: a potted plant is not needed for the leafy bag test. (a) False (b) True
19. 19.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a balloon (b) a small bowl (c) white paper (d) an adult with an iron
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) warm water (c) a spoon (d) a shallow dish
21. 21.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) milk turning to curd (c) melting butter (d) melting ice
22. 22.🧺 Do we need a magnet for the fizzy balloon? (a) needed (b) not needed
23. 23.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) reddish-brown (c) it turns green (d) it turns blue
24. 24.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
25. 25.True or false: baking soda is not needed for the fizzy balloon. (a) True (b) False
26. 26.🔮 Can the brown writing go back to being invisible? (a) yes, if shaken (b) no, it stays brown (c) yes, if cooled (d) yes, in the dark
27. 27.True or false: sunlight is something yeast needs. (a) True (b) False
28. 28.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) fresh cream (b) a mirror (c) a timer (d) a bowl
29. 29.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) there is no change (b) it shrinks (c) it turns blue (d) it grows bigger
30. 30.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to wash dishes (c) to make bread rise (d) to clean floors
31. 31.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) spoons of baking soda (b) the same bottle (c) size of the balloon
32. 32.🧺 Which of these is not needed for the leafy bag test? (a) a potted plant (b) a few hours (c) a magnet (d) a clear plastic bag
33. 33.🛟 Why should you never drink water just because it looks clear? (a) clear water is salty (b) germs are invisible (c) clear water is hot (d) clear water is sweet
34. 34.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) the same kind of bag (b) sun or shade (c) the size of the plant (d) the kind of plant
35. 35.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) folding paper (c) baking a cake (d) melting ice
36. 36.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
37. 37.🍞 Which of these is something yeast needs? (a) vinegar (b) warm water (c) a magnet (d) salt
38. 38.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) salt water (d) detergent water
39. 39.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is kept the same. (a) False (b) True
40. 40.🔍 Which is the odd one out? (a) sugar water (b) vinegar (c) plain water (d) salt water

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids