Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 866 · 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 number of drops (b) the light we look in (c) the turmeric paper (d) the liquid we test
2. 2.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
3. 3.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we keep it the same (b) we change it (c) we measure it
4. 4.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the salt (b) nothing (c) the water (d) the mud
5. 5.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a small bowl (b) cotton wool (c) water (d) a magnet
6. 6.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a few hours (b) a mirror (c) a rubber band (d) sunlight
7. 7.🫗 Which of these is done by winnowing? (a) bad grains from rice (b) bran from wheat flour (c) gravel from fine sand (d) chaff from wheat grain
8. 8.🌱 What comes out of a moong seed first when it sprouts? (a) a thorn (b) a tiny root (c) a flower (d) a fruit
9. 9.🧺 Do we need a clean glass for the muddy water filter? (a) not needed (b) needed
10. 10.🛟 What should you do after handling muddy water? (a) wash hands afterwards (b) wipe hands on face (c) nothing is needed (d) lick your fingers
11. 11.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) spoons of baking soda (b) size of the balloon (c) the amount of vinegar (d) the kind of balloon
12. 12.🧺 Do we need yeast for the leafy bag test? (a) not needed (b) needed
13. 13.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (b) salt (c) a shallow dish (d) warm water
14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) False (b) True
15. 15.🧺 Which of these is needed for the fizzy balloon? (a) a comb (b) sugar (c) a seed (d) a balloon
16. 16.🫧 Which of these is neutral? (a) baking soda water (b) orange juice (c) salt water (d) vinegar
17. 17.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is the one thing we change. (a) False (b) True
18. 18.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the same bottle (b) spoons of baking soda (c) the amount of vinegar (d) the kind of balloon
19. 19.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a battery cell (b) a clean glass (c) sand and pebbles (d) cotton or cloth
20. 20.🧺 Do we need a rubber band for the leafy bag test? (a) needed (b) not needed
21. 21.True or false: orange juice is a base. (a) False (b) True
22. 22.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) in a busy doorway (c) next to the baby (d) on the edge of a table
23. 23.🛟 Why is a plastic jar a good choice for shaking? (a) it is magnetic (b) it is hotter (c) it is heavier (d) it will not break
24. 24.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
25. 25.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a timer (b) a bowl (c) turmeric powder (d) cold water to rinse
26. 26.🍋 Why does the lemon writing turn brown with heat? (a) the juice scorches first (b) the iron is brown (c) paper turns lemony (d) heat adds colour
27. 27.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same glass is the one thing we change. (a) False (b) True
28. 28.🫧 Is curd an acid, a base or neutral? (a) an acid (b) a base (c) neutral
29. 29.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the kind of plant”? (a) we keep it the same (b) we change it (c) we measure it
30. 30.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) pale yellow (b) dark green (c) bright red (d) blue
31. 31.True or false: vinegar is something yeast does not need. (a) False (b) True
32. 32.🌱 Why do the seeds on dry cotton not sprout? (a) they have no soil (b) they have no water (c) they are too wet (d) they have no salt
33. 33.True or false: a magnet is needed for the turmeric test. (a) True (b) False
34. 34.True or false: cutting the lemon is a job a child can do. (a) False (b) True
35. 35.True or false: lemon juice is not needed for the secret lemon message. (a) False (b) True
36. 36.True or false: a magnet is not needed for the muddy water filter. (a) False (b) True
37. 37.True or false: table salt does not dissolve in water. (a) False (b) True
38. 38.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a balloon (c) sugar (d) a magnet
39. 39.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a mirror (b) water (c) a few days (d) moong seeds
40. 40.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) how dark the writing is (b) the kind of juice (c) the ironing time (d) the iron setting

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