Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 968 · 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? Which of these is the one thing we change? (a) the liquid we test (b) the colour we see (c) the turmeric paper (d) the number of drops
2. 2.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
3. 3.True or false: a cotton bud is not needed for the secret lemon message. (a) False (b) True
4. 4.True or false: baking a cake is a change that cannot be undone. (a) True (b) False
5. 5.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) dark green (b) blue (c) bright red (d) pale yellow
6. 6.True or false: yeast is not needed for the secret lemon message. (a) True (b) False
7. 7.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) there is no change (b) it turns blue (c) it shrinks (d) it grows bigger
8. 8.🛟 Who should use the hot iron in the secret message experiment? (a) whoever is fastest (b) the youngest child (c) any child (d) only an adult
9. 9.True or false: baking soda water turns turmeric reddish-brown. (a) False (b) True
10. 10.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) hot (b) salty (c) clearer (d) muddier
11. 11.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) melting butter (c) dissolving salt (d) rusting iron
12. 12.🧺 Which of these is needed for the fizzy balloon? (a) a tray for spills (b) a comb (c) a magnet (d) a seed
13. 13.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) tea stays behind (b) leaves stay behind (c) leaves pass through (d) both stay behind
14. 14.🛟 The water for the yeast should be ___. (a) very salty (b) boiling hot (c) ice cold (d) warm, not hot
15. 15.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
16. 16.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) folding paper (c) cooking an egg (d) rusting iron
17. 17.🧂 Which of these does not dissolve in water? (a) baking soda (b) chalk powder (c) food colour (d) table salt
18. 18.🧺 Do we need yeast for the secret lemon message? (a) not needed (b) needed
19. 19.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the kind of plant is kept the same. (a) True (b) False
20. 20.🪴 Through which part does a plant take in water from the soil? (a) the leaves (b) the flowers (c) the roots (d) the fruits
21. 21.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) neutral (c) an acid
22. 22.🧈 Which of these is a change that can be undone? (a) rusting iron (b) melting ice (c) cooking an egg (d) milk turning to curd
23. 23.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
24. 24.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
25. 25.🍋 Why can’t you see the lemon writing once it dries? (a) the ink is magnetic (b) it turned into air (c) dry juice is see-through (d) the paper ate it
26. 26.True or false: a paper clip is not needed for the yeast balloon. (a) True (b) False
27. 27.🧺 Which of these is not needed for the yeast balloon? (a) a magnet (b) warm water (c) a small bottle (d) dry yeast
28. 28.True or false: make seeds is a job of the leaves. (a) False (b) True
29. 29.True or false: curd is an acid. (a) False (b) True
30. 30.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) a magnet (c) turmeric powder (d) water
31. 31.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
32. 32.📘 What is yeast? (a) a kind of salt (b) a kind of stone (c) a tiny living fungus (d) a kind of sugar
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we keep it the same (b) we change it (c) we measure it
34. 34.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the water (b) nothing (c) the salt (d) the mud
35. 35.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) a comb (c) white paper strips (d) water
36. 36.True or false: folding paper is a change that can be undone. (a) False (b) True
37. 37.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) warm water (c) a balloon (d) a spoon
38. 38.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the size of the plant”? (a) we measure it (b) we keep it the same (c) we change it
39. 39.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) oxygen (b) carbon dioxide (c) hydrogen (d) helium
40. 40.True or false: make food in sunlight is a job of the roots. (a) False (b) True

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