Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 595 · 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: salt is not needed for a seed to sprout. (a) True (b) False
2. 2.🫧 Is detergent water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
3. 3.🧺 Do we need a clear plastic bag for the leafy bag test? (a) needed (b) not needed
4. 4.🧺 Do we need an adult with an iron for the secret lemon message? (a) not needed (b) needed
5. 5.True or false: sugar is something yeast does not need. (a) True (b) False
6. 6.🛟 Why must the jar lid be screwed on tightly? (a) so air gets out (b) so it gets hot (c) so cream does not spill (d) so it turns yellow
7. 7.True or false: glucose powder does not dissolve in water. (a) True (b) False
8. 8.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we change it (b) we keep it the same (c) we measure it
9. 9.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) much less water (b) much more water (c) exactly the same (d) it fills with soil
10. 10.🍋 Why does the lemon writing turn brown with heat? (a) paper turns lemony (b) heat adds colour (c) the iron is brown (d) the juice scorches first
11. 11.🌱 Why do the seeds on dry cotton not sprout? (a) they are too wet (b) they have no water (c) they have no salt (d) they have no soil
12. 12.True or false: a few hours is needed for the leafy bag test. (a) False (b) True
13. 13.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) keep it for a month (c) put it in your mouth (d) throw it at a wall
14. 14.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
15. 15.True or false: lemon juice is a base. (a) False (b) True
16. 16.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) water (c) yeast (d) lemon juice
17. 17.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) dark brown words (b) a rainbow (c) almost nothing (d) blue words
18. 18.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) plain water (d) detergent water
19. 19.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) detergent water (c) soap solution (d) lemon juice
20. 20.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
21. 21.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) a comb (d) warm water
22. 22.True or false: vinegar is a base. (a) True (b) False
23. 23.🔍 Which is the odd one out? (a) air (b) sugar (c) soil (d) salt
24. 24.🫧 Which of these is an acid? (a) soap solution (b) baking soda water (c) curd (d) plain water
25. 25.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) soap solution (c) white paper strips (d) a magnet
26. 26.⚖️ 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 water (b) the amount of yeast (c) the amount of sugar (d) the water temperature
27. 27.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “time to make butter”? (a) we change it (b) we measure it (c) we keep it the same
28. 28.🎈 Why does the balloon blow up? (a) outside air gets in (b) the bottle shrinks (c) gas is made inside (d) vinegar is hot
29. 29.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
30. 30.True or false: plain water keeps turmeric yellow. (a) True (b) False
31. 31.True or false: white paper is not needed for the secret lemon message. (a) True (b) False
32. 32.True or false: wet seeds in the dark does not sprout. (a) True (b) False
33. 33.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
34. 34.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
35. 35.True or false: a battery cell is not needed for sprouting seeds. (a) True (b) False
36. 36.🧺 Which of these is needed for sprouting seeds? (a) a mirror (b) turmeric powder (c) a magnet (d) water
37. 37.True or false: a small bowl is not needed for the secret lemon message. (a) False (b) True
38. 38.🧺 Do we need baking soda for the fizzy balloon? (a) not needed (b) needed
39. 39.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the size of the plant”? (a) we measure it (b) we change it (c) we keep it the same
40. 40.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it grows much faster (c) it bursts at once (d) it turns yellow

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