Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 179 · 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 of these is done by sieving? (a) mud from water (b) sugar from sugar water (c) gravel from fine sand (d) chaff from wheat grain
2. 2.True or false: lemon juice is neutral. (a) False (b) True
3. 3.🍋 What colour does the lemon writing turn when an adult warms it? (a) white (b) brown (c) blue (d) green
4. 4.True or false: a comb is not needed for the turmeric test. (a) True (b) False
5. 5.True or false: a mirror is needed for the secret lemon message. (a) True (b) False
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a mirror (c) a piece of string (d) a spoon
7. 7.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a magnet (b) moong seeds (c) a small bowl (d) cotton wool
8. 8.🫧 Is plain water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
9. 9.🧺 Which of these is needed for the muddy water filter? (a) turmeric powder (b) a balloon (c) a mirror (d) a funnel
10. 10.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it glows (c) it turns to sugar (d) it grows faster
11. 11.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the amount of vinegar is kept the same. (a) True (b) False
12. 12.🫗 How do we separate bad grains from rice? (a) winnowing (b) filtering (c) handpicking (d) sieving
13. 13.True or false: time is something yeast does not need. (a) False (b) True
14. 14.🍋 Which of these steps is a job a child can do? (a) putting the iron away (b) letting the paper dry (c) ironing the paper (d) cutting the lemon
15. 15.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
16. 16.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) the dish melts (c) salt grows roots (d) water evaporates
17. 17.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a battery cell (c) dry yeast (d) turmeric powder
18. 18.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the size of the plant”? (a) we measure it (b) we keep it the same (c) we change it
19. 19.🛟 Why should you never drink water just because it looks clear? (a) clear water is salty (b) clear water is sweet (c) germs are invisible (d) clear water is hot
20. 20.🧺 Which of these is not needed for the muddy water filter? (a) a funnel (b) a clean glass (c) cotton or cloth (d) a magnet
21. 21.🫗 How do we separate small stones from dal? (a) handpicking (b) filtering (c) sieving (d) winnowing
22. 22.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) freezing water (c) dissolving salt (d) baking a cake
23. 23.🪴 Which of these is a job of the leaves? (a) hold the plant in soil (b) make food in sunlight (c) take in water from soil (d) hold up the leaves
24. 24.🧺 Do we need water for sprouting seeds? (a) not needed (b) needed
25. 25.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: time to make butter is what we measure. (a) True (b) False
26. 26.🛟 The water for the yeast should be ___. (a) very salty (b) boiling hot (c) ice cold (d) warm, not hot
27. 27.⚖️ Fair test — do seeds need water to sprout? True or false: the same bowls is the one thing we change. (a) False (b) True
28. 28.True or false: salt is not needed for growing salt crystals. (a) True (b) False
29. 29.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) next to the baby (c) on the edge of a table (d) safe from small children
30. 30.🧺 Which of these is not needed for growing salt crystals? (a) a balloon (b) a piece of string (c) salt (d) a spoon
31. 31.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a tray for spills (b) an empty bottle (c) a magnet (d) a balloon
32. 32.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a jar with a tight lid (b) a bowl (c) fresh cream (d) a balloon
33. 33.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) salt crystals form (c) sugar crystals form (d) it turns to oil
34. 34.🍋 Secret message: who does this step — ironing the paper? (a) an adult does it (b) a child can do it
35. 35.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
36. 36.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
37. 37.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) the filter material (b) the same glass (c) how clear the water is
38. 38.🔍 Which is the odd one out? (a) ironing the paper (b) letting the paper dry (c) putting the iron away (d) plugging in the iron
39. 39.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) white paper (c) a small bowl (d) turmeric powder
40. 40.True or false: plugging in the iron is a job a child can do. (a) True (b) False

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