Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 956 · 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 is the odd one out? (a) food colour (b) sand (c) cooking oil (d) small pebbles
2. 2.🫧 Is baking soda water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
3. 3.🧺 Which of these is not needed for making butter? (a) cold water to rinse (b) a balloon (c) fresh cream (d) a bowl
4. 4.🧺 Which of these is not needed for the leafy bag test? (a) a potted plant (b) a clear plastic bag (c) turmeric powder (d) a rubber band
5. 5.🔮 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
6. 6.🌱 Why do the seeds on dry cotton not sprout? (a) they have no salt (b) they have no soil (c) they have no water (d) they are too wet
7. 7.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the kind of juice”? (a) we measure it (b) we change it (c) we keep it the same
8. 8.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) the balloon is bigger (c) it turns to bread (d) it shrinks to nothing
9. 9.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) dry yeast (c) a comb (d) sugar
10. 10.🔍 Which is the odd one out? (a) letting the paper dry (b) putting the iron away (c) cutting the lemon (d) ironing the paper
11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we keep it the same (c) we measure it
12. 12.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) it turns to sugar (b) yes, all of it (c) it turns to sand (d) no, salt passes through
13. 13.🫧 Which of these is a base? (a) baking soda water (b) curd (c) plain water (d) salt water
14. 14.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) True (b) False
15. 15.🧺 Which of these is needed for the muddy water filter? (a) a battery cell (b) yeast (c) a clean glass (d) a mirror
16. 16.True or false: hold the plant in soil is a job of the roots. (a) False (b) True
17. 17.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold water is heavy (c) cold slows yeast down (d) cold makes it pink
18. 18.🫗 Which of these is done by filtering? (a) sugar from sugar water (b) small stones from dal (c) bran from wheat flour (d) mud from water
19. 19.🧺 Which of these is not needed for the leafy bag test? (a) yeast (b) sunlight (c) a potted plant (d) a clear plastic bag
20. 20.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) nobody needs to (c) the youngest child (d) a grown-up
21. 21.⚖️ Fair test — do seeds need water to sprout? What do we do with “wet or dry cotton”? (a) we change it (b) we measure it (c) we keep it the same
22. 22.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
23. 23.🛟 Which safety rule fits the fizzy balloon experiment? (a) keep it away from eyes (b) shake it near your face (c) put it in your mouth (d) seal it in a glass jar
24. 24.True or false: wet seeds by a window does not sprout. (a) True (b) False
25. 25.🔍 Which is the odd one out? (a) milk turning to curd (b) browning lemon ink (c) cooking an egg (d) dissolving salt
26. 26.🧺 Do we need a magnet for the muddy water filter? (a) needed (b) not needed
27. 27.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it grows much faster (c) it bursts at once (d) it turns yellow
28. 28.🫧 Is curd an acid, a base or neutral? (a) neutral (b) a base (c) an acid
29. 29.True or false: soap solution is needed for the turmeric test. (a) False (b) True
30. 30.🧈 Which of these is a change that can be undone? (a) dissolving salt (b) rusting iron (c) cooking an egg (d) milk turning to curd
31. 31.🧺 Which of these is needed for sprouting seeds? (a) moong seeds (b) a mirror (c) turmeric powder (d) a magnet
32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the colour we see (c) the number of drops
33. 33.🧺 Do we need turmeric powder for sprouting seeds? (a) not needed (b) needed
34. 34.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) a funnel or spoon (c) a tray for spills (d) a magnet
35. 35.🔍 Which is the odd one out? (a) chalk powder (b) sawdust (c) sugar (d) cooking oil
36. 36.🧺 Do we need a few hours for the leafy bag test? (a) needed (b) not needed
37. 37.True or false: reading the message is a job for an adult. (a) True (b) False
38. 38.📘 What do we call something that changes colour to show an acid or a base? (a) a magnet (b) a prism (c) an indicator (d) a pulley
39. 39.🫧 Which of these is a base? (a) salt water (b) sugar water (c) detergent water (d) vinegar
40. 40.🛟 Why is a plastic jar a good choice for shaking? (a) it is hotter (b) it will not break (c) it is heavier (d) it is magnetic

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