Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 136 · 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: a battery cell is not needed for growing salt crystals. (a) True (b) False
2. 2.🫧 Which of these is a base? (a) vinegar (b) plain water (c) soap solution (d) tamarind water
3. 3.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
4. 4.🌱 Is air needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
5. 5.True or false: soap solution turns turmeric reddish-brown. (a) False (b) True
6. 6.True or false: a small bowl is needed for the secret lemon message. (a) True (b) False
7. 7.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) baking soda water (d) sugar water
8. 8.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same bowls”? (a) we measure it (b) we keep it the same (c) we change it
9. 9.True or false: a battery cell is not needed for the leafy bag test. (a) True (b) False
10. 10.True or false: detergent water turns turmeric reddish-brown. (a) False (b) True
11. 11.🛟 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
12. 12.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we keep it the same (b) we change it (c) we measure it
13. 13.True or false: yeast is not needed for sprouting seeds. (a) False (b) True
14. 14.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) exactly the same (b) much less water (c) much more water (d) it fills with soil
15. 15.🛟 What should you do if vinegar splashes in your eye? (a) ignore it (b) rub it hard (c) rinse with clean water (d) add baking soda
16. 16.🧺 Do we need a potted plant for the leafy bag test? (a) not needed (b) needed
17. 17.🫗 Why does filtered muddy water look clearer? (a) the water evaporates (b) the filter traps mud (c) the filter adds soap (d) the mud dissolves
18. 18.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
19. 19.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the same jar is kept the same. (a) False (b) True
20. 20.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) browning lemon ink (c) rusting iron (d) folding paper
21. 21.🧺 Which of these is not needed for the secret lemon message? (a) turmeric powder (b) lemon juice (c) white paper (d) an adult with an iron
22. 22.🫧 Which of these is an acid? (a) tamarind water (b) detergent water (c) baking soda water (d) plain water
23. 23.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) it shrinks to nothing (c) the balloon is bigger (d) it turns to bread
24. 24.True or false: salt from sea water is done by evaporating. (a) False (b) True
25. 25.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a mirror (c) a small bottle (d) sugar
26. 26.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) lemon juice (c) water (d) a magnet
27. 27.True or false: a tray for spills is needed for the fizzy balloon. (a) False (b) True
28. 28.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a comb (b) white paper strips (c) a dropper or spoon (d) lemon juice
29. 29.True or false: vinegar is a base. (a) True (b) False
30. 30.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
31. 31.True or false: orange juice is a base. (a) True (b) False
32. 32.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) vinegar (c) detergent water (d) baking soda water
33. 33.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
34. 34.True or false: a few days is not needed for sprouting seeds. (a) True (b) False
35. 35.🧺 Do we need a mirror for the fizzy balloon? (a) not needed (b) needed
36. 36.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a battery cell (c) a dropper or spoon (d) a comb
37. 37.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is the one thing we change. (a) True (b) False
38. 38.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) eat a few to check (b) never put seeds in mouth (c) feed them to pets (d) throw them at friends
39. 39.True or false: give out water vapour is a job of the flower. (a) True (b) False
40. 40.📘 What do we call plants giving out water vapour from their leaves? (a) reflection (b) germination (c) digestion (d) transpiration

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