Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 215 · 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.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) safe from small children (d) next to the baby
2. 2.🫧 Which of these is neutral? (a) sugar water (b) vinegar (c) baking soda water (d) detergent water
3. 3.🫧 Which of these is an acid? (a) soap solution (b) detergent water (c) vinegar (d) baking soda water
4. 4.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is kept the same? (a) sun or shade (b) amount of water drops (c) the time we wait
5. 5.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “amount of water drops”? (a) we keep it the same (b) we change it (c) we measure it
6. 6.🫧 Is soap solution an acid, a base or neutral? (a) neutral (b) a base (c) an acid
7. 7.True or false: plain water is neutral. (a) False (b) True
8. 8.True or false: a few hours is needed for the leafy bag test. (a) True (b) False
9. 9.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it turns blue (c) it turns yellow again (d) it disappears
10. 10.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) cotton wool (b) water (c) a few days (d) a balloon
11. 11.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a funnel (b) muddy water (c) cotton or cloth (d) a balloon
12. 12.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) False (b) True
14. 14.True or false: a timer is not needed for making butter. (a) False (b) True
15. 15.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they sprout faster (b) they grow fruit (c) they do not sprout (d) they glow
16. 16.True or false: small stones from dal is done by winnowing. (a) False (b) True
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 measure it (b) we change it (c) we keep it the same
18. 18.🔮 The fizzing stops after a while. Why? (a) the gas froze (b) the bottle got tired (c) the balloon got cold (d) an ingredient ran out
19. 19.True or false: a mirror is needed for the secret lemon message. (a) True (b) False
20. 20.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we measure it (b) we keep it the same (c) we change it
21. 21.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a clean glass (b) a funnel (c) cotton or cloth (d) a battery cell
22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) turmeric powder (c) dry yeast (d) a balloon
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) a magnet (d) salt
24. 24.🧺 Which of these is needed for the secret lemon message? (a) turmeric powder (b) yeast (c) a magnet (d) an adult with an iron
25. 25.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the iron setting (b) the kind of juice (c) the same paper (d) the same cotton bud
26. 26.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a mirror (c) warm water (d) dry yeast
27. 27.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) sugar water (c) baking soda water (d) tamarind water
28. 28.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
29. 29.📘 What do we call plants giving out water vapour from their leaves? (a) digestion (b) germination (c) reflection (d) transpiration
30. 30.🍋 Secret message: who does this step — letting the paper dry? (a) a child can do it (b) an adult does it
31. 31.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny spheres (c) tiny triangles (d) tiny cubes
32. 32.🔍 Which is the odd one out? (a) baking a cake (b) cooking an egg (c) browning lemon ink (d) melting butter
33. 33.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
34. 34.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
35. 35.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) a grown-up (d) nobody needs to
36. 36.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is the one thing we change. (a) False (b) True
37. 37.🔍 What do you see after shaking cream in a jar for a long time? (a) clear water only (b) bubbles of gas (c) lumps of butter (d) sugar crystals
38. 38.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “time to make butter”? (a) we change it (b) we keep it the same (c) we measure it
39. 39.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) an adult with an iron (c) a balloon (d) lemon juice
40. 40.🔍 Which is the odd one out? (a) milk turning to curd (b) browning lemon ink (c) rusting iron (d) melting ice

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