Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 390 · 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.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a balloon (b) a bowl (c) cold water to rinse (d) a jar with a tight lid
2. 2.🎈 What blows up the balloon in the yeast experiment? (a) carbon dioxide gas (b) smoke (c) steam (d) air from outside
3. 3.True or false: cotton wool is needed for sprouting seeds. (a) True (b) False
4. 4.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it turns yellow (c) it grows much faster (d) it bursts at once
5. 5.🔍 Which is the odd one out? (a) soil (b) salt (c) warmth (d) sunlight
6. 6.🪴 Which part of a plant does this job: make food in sunlight? (a) stem (b) leaves (c) flower (d) roots
7. 7.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) soap solution (c) a comb (d) water
8. 8.🫗 Which of these is done by handpicking? (a) sugar from sugar water (b) bad grains from rice (c) tea leaves from tea (d) husk from rice grain
9. 9.🧺 Which of these is not needed for sprouting seeds? (a) moong seeds (b) a small bowl (c) a battery cell (d) cotton wool
10. 10.🧺 Which of these is needed for the fizzy balloon? (a) a mirror (b) baking soda (c) sugar (d) a battery cell
11. 11.True or false: chaff from wheat grain is done by winnowing. (a) True (b) False
12. 12.True or false: a few hours is not needed for the leafy bag test. (a) True (b) False
13. 13.True or false: tea leaves from tea is done by filtering. (a) False (b) True
14. 14.🔍 Which is the odd one out? (a) freezing water (b) folding paper (c) melting butter (d) cooking an egg
15. 15.🧺 Do we need a magnet for sprouting seeds? (a) needed (b) not needed
16. 16.True or false: ironing the paper is a job for an adult. (a) False (b) True
17. 17.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) it turns to butter (c) salt crystals form (d) sugar crystals form
18. 18.🌱 Where does a sprouting seed get its first food from? (a) food stored in the seed (b) the air (c) the cotton wool (d) the sunlight only
19. 19.True or false: a bowl is needed for making butter. (a) True (b) False
20. 20.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we change it (b) we keep it the same (c) we measure it
21. 21.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) the dish melts (c) salt grows roots (d) water evaporates
22. 22.🫗 Which of these is done by handpicking? (a) sugar from sugar water (b) small stones from dal (c) mud from water (d) bran from wheat flour
23. 23.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
24. 24.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) the yeast is killed (c) it turns to sugar (d) it glows
25. 25.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
26. 26.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold slows yeast down (c) cold water is heavy (d) cold kills sugar
27. 27.True or false: cold water to rinse is not needed for making butter. (a) False (b) True
28. 28.🧺 Which of these is not needed for sprouting seeds? (a) turmeric powder (b) a few days (c) a small bowl (d) moong seeds
29. 29.📘 Leaves have tiny holes that let out water vapour. What are they called? (a) roots (b) petals (c) veins (d) stomata
30. 30.True or false: sawdust does not dissolve in water. (a) True (b) False
31. 31.🍋 Which of these steps is a job a child can do? (a) putting the iron away (b) plugging in the iron (c) writing the message (d) ironing the paper
32. 32.True or false: seeds on wet cotton sprouts in a few days. (a) False (b) True
33. 33.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the filter material”? (a) we keep it the same (b) we measure it (c) we change it
34. 34.🫧 What do you see when baking soda meets vinegar? (a) it turns to ice (b) lots of fizzy bubbles (c) it glows in the dark (d) nothing at all
35. 35.🫗 Why does filtered muddy water look clearer? (a) the filter adds soap (b) the mud dissolves (c) the filter traps mud (d) the water evaporates
36. 36.True or false: sugar is not needed for a seed to sprout. (a) False (b) True
37. 37.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
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 same kind of bag”? (a) we change it (b) we keep it the same (c) we measure it
39. 39.True or false: a funnel is needed for the muddy water filter. (a) True (b) False
40. 40.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) much more water (b) exactly the same (c) it fills with soil (d) much less water

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