Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 628 · 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: wet seeds in the dark does not sprout. (a) True (b) False
2. 2.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) empty (c) saturated (d) magnetic
3. 3.🧺 Which of these is not needed for the secret lemon message? (a) a cotton bud (b) yeast (c) lemon juice (d) white paper
4. 4.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
5. 5.🫗 How do we separate husk from rice grain? (a) evaporating (b) winnowing (c) filtering (d) handpicking
6. 6.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) size of the balloon (c) the amount of sugar
7. 7.🧺 Do we need fresh cream for making butter? (a) not needed (b) needed
8. 8.True or false: a mirror is needed for the secret lemon message. (a) True (b) False
9. 9.True or false: a battery cell is needed for the leafy bag test. (a) False (b) True
10. 10.True or false: putting the iron away is a job a child can do. (a) True (b) False
11. 11.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it sinks to the bottom (b) it dissolves (c) it turns to sand (d) it floats on top
12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the turmeric paper (b) the liquid we test (c) the colour we see (d) the number of drops
13. 13.🧺 Do we need a battery cell for the leafy bag test? (a) not needed (b) needed
14. 14.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a battery cell (b) cotton or cloth (c) muddy water (d) a clean glass
15. 15.🫗 Which of these is done by evaporating? (a) chaff from wheat grain (b) salt from sea water (c) bad grains from rice (d) gravel from fine sand
16. 16.🪴 Which of these is a job of the stem? (a) give out water vapour (b) take in water from soil (c) hold up the leaves (d) hold the plant in soil
17. 17.⚖️ Fair test — do seeds need water to sprout? True or false: the kind of seeds is kept the same. (a) False (b) True
18. 18.🧺 Which of these is not needed for the secret lemon message? (a) a cotton bud (b) a balloon (c) white paper (d) an adult with an iron
19. 19.True or false: water is needed for the turmeric test. (a) False (b) True
20. 20.🍋 Why can’t you see the lemon writing once it dries? (a) the ink is magnetic (b) dry juice is see-through (c) the paper ate it (d) it turned into air
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) sunny or shady place (b) the kind of salt (c) the amount of water (d) the amount of salt
22. 22.🫧 Is orange juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
23. 23.🧺 Do we need muddy water for the muddy water filter? (a) not needed (b) needed
24. 24.True or false: vinegar is not needed for the fizzy balloon. (a) True (b) False
25. 25.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny cubes (c) tiny spheres (d) tiny stars
26. 26.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) vinegar (c) detergent water (d) sugar water
27. 27.🪴 Which of these is a job of the flower? (a) take in water from soil (b) carry water upward (c) make seeds (d) give out water vapour
28. 28.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) dissolving salt (c) rusting iron (d) melting butter
29. 29.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it turns to sugar (c) it grows faster (d) the yeast is killed
30. 30.🪴 Which of these is a job of the stem? (a) make seeds (b) give out water vapour (c) make food in sunlight (d) carry water upward
31. 31.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
32. 32.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) freezing water (c) melting ice (d) melting butter
33. 33.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) lemon juice (c) yeast (d) a small bowl
34. 34.🛟 Why must a plastic bag never go over anyone’s head? (a) it can block breathing (b) it gets wet (c) it is too big (d) it changes colour
35. 35.🔮 Can the brown writing go back to being invisible? (a) yes, if shaken (b) yes, if cooled (c) no, it stays brown (d) yes, in the dark
36. 36.🧺 Do we need yeast for the leafy bag test? (a) needed (b) not needed
37. 37.True or false: dissolving salt is a change that can be undone. (a) False (b) True
38. 38.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is kept the same. (a) False (b) True
39. 39.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) use only kitchen items (c) sniff each bottle hard (d) mix bathroom cleaners
40. 40.🧺 Do we need sand and pebbles for the muddy water filter? (a) needed (b) not needed

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