Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 432 · 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 needed for a seed to sprout? (a) sunlight (b) salt (c) sugar (d) warmth
2. 2.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same cotton bud”? (a) we measure it (b) we change it (c) we keep it the same
3. 3.🫧 Which of these is an acid? (a) sugar water (b) plain water (c) soap solution (d) lemon juice
4. 4.True or false: a battery cell is not needed for the muddy water filter. (a) False (b) True
5. 5.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it stays yellow (c) it turns blue (d) reddish-brown
6. 6.🧺 Which of these is needed for the leafy bag test? (a) a magnet (b) yeast (c) a battery cell (d) a few hours
7. 7.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same muddy water”? (a) we change it (b) we measure it (c) we keep it the same
8. 8.🟡 Which of these keeps turmeric yellow? (a) lemon juice (b) baking soda water (c) detergent water (d) soap solution
9. 9.🫧 Is plain water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
10. 10.True or false: warm water is needed for growing salt crystals. (a) False (b) True
11. 11.🧺 Which of these is needed for the secret lemon message? (a) an adult with an iron (b) turmeric powder (c) a battery cell (d) a magnet
12. 12.🧺 Do we need a clear plastic bag for the leafy bag test? (a) needed (b) not needed
13. 13.True or false: a dropper or spoon is not needed for the turmeric test. (a) True (b) False
14. 14.True or false: a small bottle is needed for the yeast balloon. (a) True (b) False
15. 15.🌱 Which of these is needed for a seed to sprout? (a) air (b) sunlight (c) soil (d) salt
16. 16.True or false: baking a cake is a change that can be undone. (a) False (b) True
17. 17.🛟 How should the plastic bag be tied around the branch? (a) with a hot glue gun (b) with sharp wire (c) gently, not too tight (d) as tight as possible
18. 18.🔮 Predict: the adult irons for only one second. What happens? (a) writing turns green (b) writing stays faint (c) it gets darker (d) the paper floats
19. 19.🫧 Is baking soda water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
20. 20.🔮 Predict: you stop shaking after only one minute. What do you have? (a) still runny cream (b) ghee (c) cheese (d) butter lumps
21. 21.True or false: seeds on wet cotton sprouts in a few days. (a) False (b) True
22. 22.True or false: lemon juice is an acid. (a) False (b) True
23. 23.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it grows bigger (b) it shrinks (c) there is no change (d) it turns blue
24. 24.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is the one thing we change. (a) False (b) True
25. 25.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) time (d) salt
26. 26.🧺 Which of these is not needed for the leafy bag test? (a) a few hours (b) a clear plastic bag (c) yeast (d) a rubber band
27. 27.🧺 Which of these is not needed for the yeast balloon? (a) a comb (b) sugar (c) dry yeast (d) warm water
28. 28.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the same jar”? (a) we keep it the same (b) we change it (c) we measure it
29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a mirror (c) sugar (d) a balloon
30. 30.⚖️ Fair test — do seeds need water to sprout? True or false: the number of seeds is kept the same. (a) True (b) False
31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) True (b) False
32. 32.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a potted plant (b) a magnet (c) a rubber band (d) a few hours
33. 33.🍋 Secret message: who does this step — putting the iron away? (a) a child can do it (b) an adult does it
34. 34.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) tamarind water (d) detergent water
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a shallow dish (c) salt (d) a magnet
36. 36.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we change it (b) we keep it the same (c) we measure it
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) sunny or shady place (c) the amount of water (d) the amount of salt
38. 38.True or false: folding paper is a change that can be undone. (a) False (b) True
39. 39.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the amount poured is what we measure. (a) False (b) True
40. 40.🍋 Secret message: who does this step — plugging in the iron? (a) an adult does it (b) a child can do it

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