Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 592 · 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: air is needed for a seed to sprout. (a) True (b) False
2. 2.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) cotton or cloth (b) sand and pebbles (c) a funnel (d) a balloon
3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) salt (d) a mirror
4. 4.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we measure it (b) we change it (c) we keep it the same
5. 5.🧺 Which of these is needed for sprouting seeds? (a) yeast (b) a mirror (c) a few days (d) turmeric powder
6. 6.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) no crystals (d) bigger crystals
7. 7.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
8. 8.🫗 How do we separate husk from rice grain? (a) winnowing (b) sieving (c) evaporating (d) filtering
9. 9.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) safe from small children (c) next to the baby (d) on the edge of a table
10. 10.🍞 Which of these is something yeast needs? (a) a magnet (b) vinegar (c) sunlight (d) sugar
11. 11.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) use only kitchen items (c) mix bathroom cleaners (d) sniff each bottle hard
12. 12.📘 Leaves have tiny holes that let out water vapour. What are they called? (a) stomata (b) petals (c) roots (d) veins
13. 13.🧈 Before the butter appears, what does the cream turn into? (a) clear water (b) powder (c) ice (d) thick whipped cream
14. 14.True or false: a rubber band is not needed for the leafy bag test. (a) True (b) False
15. 15.🪴 Which part of a plant does this job: hold the plant in soil? (a) stem (b) flower (c) roots (d) leaves
16. 16.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) baking a cake (c) cooking an egg (d) freezing water
17. 17.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we keep it the same (b) we change it (c) we measure it
18. 18.True or false: plain water is an acid. (a) False (b) True
19. 19.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) clearer (b) salty (c) hot (d) muddier
20. 20.True or false: turmeric powder is needed for the yeast balloon. (a) True (b) False
21. 21.True or false: glucose powder does not dissolve in water. (a) True (b) False
22. 22.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it stays yellow (c) reddish-brown (d) it turns blue
23. 23.🧺 Which of these is needed for the fizzy balloon? (a) a seed (b) baking soda (c) sugar (d) a mirror
24. 24.🫧 Is tamarind water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
25. 25.🧺 Do we need a seed for the fizzy balloon? (a) not needed (b) needed
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a piece of string (d) yeast
27. 27.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same funnel is kept the same. (a) False (b) True
28. 28.🫗 Which of these is done by evaporating? (a) bran from wheat flour (b) sugar from sugar water (c) mud from water (d) bad grains from rice
29. 29.🌱 Why do the seeds on dry cotton not sprout? (a) they have no soil (b) they have no salt (c) they have no water (d) they are too wet
30. 30.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it flowers more (b) it grows faster (c) it wilts and droops (d) it turns blue
31. 31.🛟 How should the plastic bag be tied around the branch? (a) as tight as possible (b) gently, not too tight (c) with a hot glue gun (d) with sharp wire
32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the liquid we test (c) the turmeric paper
33. 33.True or false: sugar water is neutral. (a) False (b) True
34. 34.True or false: salt water is an acid. (a) True (b) False
35. 35.⚖️ 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 change it (b) we keep it the same (c) we measure it
36. 36.🧺 Which of these is not needed for the secret lemon message? (a) white paper (b) lemon juice (c) a mirror (d) a cotton bud
37. 37.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same funnel”? (a) we measure it (b) we keep it the same (c) we change it
38. 38.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a mirror (b) a potted plant (c) a clear plastic bag (d) a few hours
39. 39.🫧 Is orange juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
40. 40.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it disappears (c) it turns yellow again (d) it turns blue

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