Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 472 · 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.📘 The browning of lemon juice with heat is a ___ change. (a) chemical (b) musical (c) physical (d) magnetic
2. 2.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a funnel (b) a magnet (c) sand and pebbles (d) muddy water
3. 3.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
4. 4.🧺 Do we need turmeric powder for the muddy water filter? (a) not needed (b) needed
5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a mirror (c) a small bottle (d) a balloon
6. 6.True or false: seeds on wet cotton does not sprout. (a) False (b) True
7. 7.True or false: salt water is an acid. (a) False (b) True
8. 8.🧺 Do we need sunlight for the leafy bag test? (a) not needed (b) needed
9. 9.🫗 How do we separate small stones from dal? (a) filtering (b) sieving (c) winnowing (d) handpicking
10. 10.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we keep it the same (b) we measure it (c) we change it
12. 12.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it turns blue (b) it flowers more (c) it grows faster (d) it wilts and droops
13. 13.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the same funnel (b) how clear the water is (c) the same muddy water (d) the filter material
14. 14.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) False (b) True
15. 15.🛟 How should the plastic bag be tied around the branch? (a) with a hot glue gun (b) gently, not too tight (c) with sharp wire (d) as tight as possible
16. 16.True or false: freezing water is a change that cannot be undone. (a) False (b) True
17. 17.🍋 What colour does the lemon writing turn when an adult warms it? (a) blue (b) green (c) white (d) brown
18. 18.🧺 Which of these is not needed for the muddy water filter? (a) sand and pebbles (b) a funnel (c) a magnet (d) a clean glass
19. 19.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) salt (d) sugar
20. 20.🔍 Which is the odd one out? (a) sawdust (b) sand (c) cooking oil (d) glucose powder
21. 21.🧺 Do we need a battery cell for the muddy water filter? (a) not needed (b) needed
22. 22.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) soap solution (c) water (d) a magnet
23. 23.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) cotton or cloth (c) sand and pebbles (d) yeast
24. 24.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is the one thing we change? (a) the amount of yeast (b) the amount of sugar (c) the same bottles (d) the water temperature
25. 25.True or false: a battery cell is not needed for making butter. (a) False (b) True
26. 26.⚖️ 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
27. 27.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) cold water to rinse (b) a jar with a tight lid (c) a magnet (d) fresh cream
28. 28.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is what we measure? (a) the same kind of bag (b) amount of water drops (c) the size of the plant (d) the kind of plant
29. 29.🧺 Do we need a mirror for the leafy bag test? (a) not needed (b) needed
30. 30.🫗 How do we separate mud from water? (a) filtering (b) handpicking (c) evaporating (d) winnowing
31. 31.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) a few hours (c) a battery cell (d) sunlight
32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the colour we see (c) the liquid we test (d) the turmeric paper
33. 33.🧺 Which of these is not needed for the fizzy balloon? (a) a funnel or spoon (b) a seed (c) vinegar (d) a balloon
34. 34.True or false: a mirror is needed for making butter. (a) True (b) False
35. 35.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
36. 36.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) water (b) yeast (c) moong seeds (d) cotton wool
37. 37.🔍 Which is the odd one out? (a) writing the message (b) cutting the lemon (c) putting the iron away (d) ironing the paper
38. 38.True or false: tamarind water turns turmeric reddish-brown. (a) True (b) False
39. 39.True or false: a battery cell is not needed for the secret lemon message. (a) False (b) True
40. 40.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) lemon juice (b) a mirror (c) white paper (d) a cotton bud

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