Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 318 · 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.True or false: browning lemon ink is a change that cannot be undone. (a) True (b) False
2. 2.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap water is a base (c) soap is an acid (d) soap is magnetic
3. 3.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) there is no change (b) it grows bigger (c) it shrinks (d) it turns blue
4. 4.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to make bread rise (c) to colour rice (d) to clean floors
5. 5.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) how clear the water is (b) the same glass (c) the same funnel (d) the filter material
6. 6.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) pour it down the sink (c) keep it for a month (d) throw it at a wall
7. 7.🔮 The fizzing stops after a while. Why? (a) the bottle got tired (b) the gas froze (c) an ingredient ran out (d) the balloon got cold
8. 8.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
9. 9.True or false: tamarind water is neutral. (a) True (b) False
10. 10.True or false: folding paper is a change that can be undone. (a) False (b) True
11. 11.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the kind of balloon is what we measure. (a) False (b) True
12. 12.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
13. 13.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we measure it (b) we change it (c) we keep it the same
14. 14.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the mud (b) the salt (c) the water (d) nothing
15. 15.🛟 Why must a plastic bag never go over anyone’s head? (a) it changes colour (b) it can block breathing (c) it is too big (d) it gets wet
16. 16.True or false: give out water vapour is a job of the stem. (a) True (b) False
17. 17.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a tray for spills (b) vinegar (c) baking soda (d) a comb
18. 18.🧺 Do we need a magnet for sprouting seeds? (a) needed (b) not needed
19. 19.📘 What do we call a seed starting to grow? (a) evaporation (b) pollination (c) condensation (d) germination
20. 20.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) much more water (b) much less water (c) it fills with soil (d) exactly the same
21. 21.🛟 Which safety rule fits the fizzy balloon experiment? (a) keep it away from eyes (b) put it in your mouth (c) shake it near your face (d) seal it in a glass jar
22. 22.🫗 Which of these is done by evaporating? (a) bran from wheat flour (b) small stones from dal (c) salt from sea water (d) mud from water
23. 23.🧺 Do we need a clear plastic bag for the leafy bag test? (a) not needed (b) needed
24. 24.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) dark brown words (b) a rainbow (c) almost nothing (d) blue words
25. 25.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it turns green (c) reddish-brown (d) it stays yellow
26. 26.⚖️ Fair test — do seeds need water to sprout? True or false: how many seeds sprout is the one thing we change. (a) True (b) False
27. 27.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same bowls”? (a) we change it (b) we measure it (c) we keep it the same
28. 28.🧺 Do we need a battery cell for the muddy water filter? (a) not needed (b) needed
29. 29.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the water temperature”? (a) we measure it (b) we keep it the same (c) we change it
30. 30.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a few hours (b) a potted plant (c) a rubber band (d) a mirror
31. 31.True or false: yeast is not needed for the secret lemon message. (a) True (b) False
32. 32.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) a base (c) an acid
33. 33.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) the cool cloudy day (b) both the same (c) the hot sunny day (d) neither of them
34. 34.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) an empty bottle (b) vinegar (c) a magnet (d) a tray for spills
35. 35.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
36. 36.True or false: bran from wheat flour is done by winnowing. (a) True (b) False
37. 37.🧺 Which of these is not needed for sprouting seeds? (a) moong seeds (b) cotton wool (c) yeast (d) a few days
38. 38.True or false: sugar water is an acid. (a) False (b) True
39. 39.🧺 Do we need moong seeds for sprouting seeds? (a) needed (b) not needed
40. 40.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a small bottle (c) a battery cell (d) dry yeast

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