Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 294 · 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 can be undone? (a) milk turning to curd (b) melting butter (c) cooking an egg (d) rusting iron
2. 2.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) steam (c) carbon dioxide gas (d) air from outside
3. 3.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) melting butter (c) folding paper (d) dissolving salt
4. 4.🫧 Is curd an acid, a base or neutral? (a) neutral (b) a base (c) an acid
5. 5.True or false: sugar does not dissolve in water. (a) False (b) True
6. 6.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a comb (c) a mirror (d) water
7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the number of drops (b) the liquid we test (c) the colour we see
8. 8.⚖️ 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) the size of the plant (b) the kind of plant (c) the time we wait (d) amount of water drops
9. 9.True or false: make seeds is a job of the flower. (a) True (b) False
10. 10.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) the cool cloudy day (b) the hot sunny day (c) neither of them (d) both the same
11. 11.🍋 Why can’t you see the lemon writing once it dries? (a) the ink is magnetic (b) dry juice is see-through (c) it turned into air (d) the paper ate it
12. 12.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) soap solution (d) lemon juice
13. 13.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: how clear the water is is the one thing we change. (a) False (b) True
14. 14.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns black (c) it turns red (d) it turns blue
15. 15.True or false: salt is needed for a seed to sprout. (a) False (b) True
16. 16.🧂 Which of these does not dissolve in water? (a) chalk powder (b) sugar (c) baking soda (d) table salt
17. 17.True or false: baking soda water is a base. (a) False (b) True
18. 18.True or false: a magnet is not needed for the muddy water filter. (a) True (b) False
19. 19.🧺 Which of these is not needed for making butter? (a) a jar with a tight lid (b) fresh cream (c) cold water to rinse (d) a balloon
20. 20.🔍 Which is the odd one out? (a) table salt (b) sand (c) baking soda (d) food colour
21. 21.True or false: a mirror is not needed for the muddy water filter. (a) False (b) True
22. 22.🧺 Do we need a cotton bud for the secret lemon message? (a) not needed (b) needed
23. 23.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
24. 24.True or false: vinegar is something yeast needs. (a) True (b) False
25. 25.True or false: melting butter is a change that cannot be undone. (a) False (b) True
26. 26.🧺 Which of these is needed for the muddy water filter? (a) a magnet (b) a battery cell (c) sand and pebbles (d) a mirror
27. 27.🛟 What should you do if vinegar splashes in your eye? (a) rub it hard (b) rinse with clean water (c) add baking soda (d) ignore it
28. 28.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) leaves pass through (b) tea stays behind (c) both stay behind (d) leaves stay behind
29. 29.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
30. 30.🔍 Which is the odd one out? (a) water (b) sugar (c) air (d) warmth
31. 31.🔍 Which is the odd one out? (a) sawdust (b) food colour (c) cooking oil (d) chalk powder
32. 32.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) throw it at a wall (c) put it in your mouth (d) keep it for a month
33. 33.⚖️ 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 kept the same. (a) False (b) True
34. 34.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
35. 35.⚖️ Fair test — do seeds need water to sprout? What do we do with “the number of seeds”? (a) we measure it (b) we keep it the same (c) we change it
36. 36.📘 Leaves have tiny holes that let out water vapour. What are they called? (a) roots (b) stomata (c) veins (d) petals
37. 37.🫧 Is baking soda water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
38. 38.🧺 Which of these is needed for the fizzy balloon? (a) a comb (b) an empty bottle (c) sugar (d) a magnet
39. 39.🧺 Which of these is needed for the leafy bag test? (a) a magnet (b) vinegar (c) turmeric powder (d) a clear plastic bag
40. 40.🫧 Which of these is neutral? (a) tamarind water (b) orange juice (c) sugar water (d) lemon juice

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