Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 728 · 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.🔮 The fizzing stops after a while. Why? (a) an ingredient ran out (b) the gas froze (c) the bottle got tired (d) the balloon got cold
2. 2.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a balloon (c) a magnet (d) lemon juice
3. 3.🫧 Which of these is a base? (a) sugar water (b) vinegar (c) detergent water (d) plain water
4. 4.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it grows bigger (b) there is no change (c) it turns blue (d) it shrinks
5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the turmeric paper (c) the colour we see
6. 6.🧺 Which of these is not needed for the leafy bag test? (a) a clear plastic bag (b) a few hours (c) a battery cell (d) a potted plant
7. 7.🧈 Which of these is a change that can be undone? (a) freezing water (b) cooking an egg (c) rusting iron (d) milk turning to curd
8. 8.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a friend who is running (c) the youngest child (d) a grown-up
9. 9.🧂 Which of these does not dissolve in water? (a) baking soda (b) food colour (c) table salt (d) small pebbles
10. 10.True or false: vinegar turns turmeric reddish-brown. (a) True (b) False
11. 11.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a few days (b) cotton wool (c) a magnet (d) moong seeds
12. 12.True or false: a battery cell is not needed for the yeast balloon. (a) True (b) False
13. 13.🍋 Why can’t you see the lemon writing once it dries? (a) the ink is magnetic (b) it turned into air (c) the paper ate it (d) dry juice is see-through
14. 14.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “sun or shade”? (a) we change it (b) we measure it (c) we keep it the same
15. 15.True or false: warm water is something yeast needs. (a) False (b) True
16. 16.⚖️ Fair test — do seeds need water to sprout? What do we do with “wet or dry cotton”? (a) we keep it the same (b) we measure it (c) we change it
17. 17.True or false: a balloon is needed for the fizzy balloon. (a) True (b) False
18. 18.True or false: detergent water is a base. (a) True (b) False
19. 19.🎈 Why does the balloon blow up? (a) gas is made inside (b) outside air gets in (c) vinegar is hot (d) the bottle shrinks
20. 20.True or false: yeast is needed for growing salt crystals. (a) False (b) True
21. 21.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
22. 22.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) days to see crystals (c) the amount of water
23. 23.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a balloon (c) soap solution (d) white paper strips
24. 24.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the amount of yeast (b) the water temperature (c) size of the balloon
25. 25.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the amount of vinegar is kept the same. (a) False (b) True
26. 26.🔍 Which is the odd one out? (a) sawdust (b) small pebbles (c) food colour (d) cooking oil
27. 27.🧈 Which of these is a change that can be undone? (a) rusting iron (b) melting ice (c) baking a cake (d) milk turning to curd
28. 28.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
29. 29.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
30. 30.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a few days (b) cotton wool (c) water (d) a balloon
31. 31.🔍 Which is the odd one out? (a) sunlight (b) warmth (c) salt (d) sugar
32. 32.True or false: turmeric powder is needed for the turmeric test. (a) True (b) False
33. 33.🫧 Is salt water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
34. 34.🧺 Do we need a timer for making butter? (a) needed (b) not needed
35. 35.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is the one thing we change. (a) False (b) True
36. 36.⚖️ 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) sun or shade (b) the size of the plant (c) amount of water drops
37. 37.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
38. 38.🔍 Which is the odd one out? (a) lemon juice (b) curd (c) plain water (d) orange juice
39. 39.🧺 Do we need turmeric powder for the muddy water filter? (a) not needed (b) needed
40. 40.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow

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