Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 695 · 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 a change that cannot be undone? (a) freezing water (b) dissolving salt (c) melting butter (d) baking a cake
2. 2.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
3. 3.🍞 Which of these is something yeast needs? (a) sunlight (b) time (c) salt (d) a magnet
4. 4.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it stays yellow (c) it turns green (d) it turns blue
5. 5.🔍 Which is the odd one out? (a) chalk powder (b) glucose powder (c) sugar (d) table salt
6. 6.🍋 Why can’t you see the lemon writing once it dries? (a) the paper ate it (b) dry juice is see-through (c) it turned into air (d) the ink is magnetic
7. 7.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the amount poured”? (a) we keep it the same (b) we measure it (c) we change it
8. 8.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a battery cell (b) white paper (c) an adult with an iron (d) a small bowl
9. 9.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
10. 10.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) the kind of seeds (b) the same bowls (c) wet or dry cotton (d) how many seeds sprout
11. 11.True or false: yeast is needed for the leafy bag test. (a) False (b) True
12. 12.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the same jar is kept the same. (a) False (b) True
13. 13.🧺 Which of these is not needed for the secret lemon message? (a) yeast (b) lemon juice (c) a cotton bud (d) an adult with an iron
14. 14.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
15. 15.🧂 Which of these dissolves in water? (a) cooking oil (b) small pebbles (c) sugar (d) chalk powder
16. 16.🧺 Do we need a battery cell for making butter? (a) needed (b) not needed
17. 17.🛟 Why should you never drink water just because it looks clear? (a) clear water is hot (b) clear water is salty (c) germs are invisible (d) clear water is sweet
18. 18.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a small bowl (b) a mirror (c) water (d) a few days
19. 19.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns black (c) it turns blue (d) it stays yellow
20. 20.🫗 Which of these is done by handpicking? (a) sugar from sugar water (b) gravel from fine sand (c) husk from rice grain (d) bad grains from rice
21. 21.True or false: hold the plant in soil is a job of the leaves. (a) True (b) False
22. 22.🫧 Is soap solution an acid, a base or neutral? (a) neutral (b) a base (c) an acid
23. 23.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the ironing time is kept the same. (a) False (b) True
24. 24.🧺 Do we need lemon juice for the secret lemon message? (a) not needed (b) needed
25. 25.🧈 Which of these is a change that can be undone? (a) baking a cake (b) rusting iron (c) milk turning to curd (d) melting ice
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a balloon (c) a shallow dish (d) salt
27. 27.🫗 Which of these is done by handpicking? (a) gravel from fine sand (b) bran from wheat flour (c) tea leaves from tea (d) small stones from dal
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we measure it (b) we change it (c) we keep it the same
29. 29.True or false: a balloon is not needed for the fizzy balloon. (a) True (b) False
30. 30.True or false: vinegar is an acid. (a) True (b) False
31. 31.🧺 Which of these is needed for the leafy bag test? (a) a mirror (b) a potted plant (c) turmeric powder (d) a battery cell
32. 32.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) white paper (c) a mirror (d) a small bowl
33. 33.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a magnet (c) lemon juice (d) turmeric powder
34. 34.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the size of the plant is kept the same. (a) True (b) False
35. 35.True or false: a paper clip is not needed for the yeast balloon. (a) True (b) False
36. 36.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
37. 37.⚖️ 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 funnel (c) how clear the water is (d) the amount poured
38. 38.🍋 Which of these steps is a job a child can do? (a) cutting the lemon (b) ironing the paper (c) putting the iron away (d) letting the paper dry
39. 39.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) saturated (c) frozen (d) magnetic
40. 40.⚖️ 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) amount of water drops (c) sun or shade

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