Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 209 · 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: freezing water is a change that can be undone. (a) False (b) True
2. 2.🛟 Why must children keep their fingers away from the iron? (a) it is cold (b) it is sticky (c) it can burn skin (d) it is magnetic
3. 3.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the filter material (b) the same muddy water (c) the amount poured (d) how clear the water is
4. 4.🛟 Who should use the hot iron in the secret message experiment? (a) any child (b) the youngest child (c) whoever is fastest (d) only an adult
5. 5.🧺 Do we need a mirror for sprouting seeds? (a) not needed (b) needed
6. 6.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same bowls”? (a) we keep it the same (b) we measure it (c) we change it
7. 7.True or false: bad grains from rice is done by handpicking. (a) False (b) True
8. 8.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) dry yeast (c) warm water (d) a mirror
9. 9.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
10. 10.True or false: a small bowl is needed for sprouting seeds. (a) False (b) True
11. 11.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a battery cell (c) warm water (d) a balloon
12. 12.🛟 What should you do after touching soil or seeds? (a) skip washing (b) rub your eyes (c) wash your hands (d) lick your fingers
13. 13.True or false: a magnet is not needed for growing salt crystals. (a) True (b) False
14. 14.🫧 Which of these is neutral? (a) sugar water (b) soap solution (c) vinegar (d) orange juice
15. 15.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) it stays white (c) reddish-brown (d) bright blue
16. 16.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
17. 17.True or false: dipping the cotton bud is a job for an adult. (a) True (b) False
18. 18.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we keep it the same (c) we measure it
19. 19.True or false: melting ice is a change that cannot be undone. (a) True (b) False
20. 20.🧺 Do we need vinegar for the fizzy balloon? (a) needed (b) not needed
21. 21.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a grown-up (c) a friend who is running (d) nobody needs to
22. 22.🧈 What is the watery liquid left after the butter forms? (a) honey (b) buttermilk (c) oil (d) vinegar
23. 23.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) spoons of baking soda (b) the same bottle (c) size of the balloon (d) the amount of vinegar
24. 24.🛟 Why should you never drink water just because it looks clear? (a) clear water is salty (b) germs are invisible (c) clear water is sweet (d) clear water is hot
25. 25.🔍 Which is the odd one out? (a) salt (b) sugar (c) time (d) warm water
26. 26.True or false: cold water to rinse is not needed for making butter. (a) True (b) False
27. 27.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a mirror (d) salt
28. 28.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) feed them to pets (b) never put seeds in mouth (c) throw them at friends (d) eat a few to check
29. 29.🧺 Do we need lemon juice for the secret lemon message? (a) not needed (b) needed
30. 30.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it turns yellow (c) it grows very little (d) it bursts at once
31. 31.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we measure it (b) we change it (c) we keep it the same
32. 32.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “sun or shade”? (a) we change it (b) we measure it (c) we keep it the same
33. 33.🧈 Which of these is a change that can be undone? (a) baking a cake (b) cooking an egg (c) melting butter (d) rusting iron
34. 34.True or false: a mirror is not needed for growing salt crystals. (a) False (b) True
35. 35.🧺 Do we need a dropper or spoon for the turmeric test? (a) needed (b) not needed
36. 36.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the ironing time (b) the same cotton bud (c) the kind of juice (d) how dark the writing is
37. 37.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
38. 38.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
39. 39.🛟 Why is a plastic jar a good choice for shaking? (a) it is heavier (b) it will not break (c) it is magnetic (d) it is hotter
40. 40.🍞 Which of these is something yeast does not need? (a) vinegar (b) warm water (c) time (d) sugar

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