Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 430 · 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 needed for the leafy bag test. (a) False (b) True
2. 2.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) a few hours (c) a battery cell (d) a rubber band
3. 3.🌱 Which of these is not needed for a seed to sprout? (a) air (b) water (c) warmth (d) salt
4. 4.🌱 Which of these does not sprout? (a) wet seeds by a window (b) seeds on wet cotton (c) seeds in the freezer (d) wet seeds in the dark
5. 5.🛟 What should you do after handling muddy water? (a) wash hands afterwards (b) lick your fingers (c) wipe hands on face (d) nothing is needed
6. 6.True or false: cooking oil dissolves in water. (a) False (b) True
7. 7.True or false: vinegar is a base. (a) False (b) True
8. 8.🧺 Which of these is needed for the secret lemon message? (a) lemon juice (b) yeast (c) a mirror (d) a magnet
9. 9.True or false: detergent water is an acid. (a) True (b) False
10. 10.🛟 Why should you never drink water just because it looks clear? (a) clear water is salty (b) clear water is sweet (c) germs are invisible (d) clear water is hot
11. 11.🧺 Which of these is not needed for the yeast balloon? (a) a battery cell (b) warm water (c) dry yeast (d) sugar
12. 12.True or false: a tray for spills is not needed for the fizzy balloon. (a) True (b) False
13. 13.🔮 The fizzing stops after a while. Why? (a) an ingredient ran out (b) the gas froze (c) the bottle got tired (d) the balloon got cold
14. 14.True or false: wet seeds in the dark does not sprout. (a) False (b) True
15. 15.🌱 Is sugar needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
16. 16.True or false: hold up the leaves is a job of the stem. (a) False (b) True
17. 17.⚖️ 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 keep it the same (b) we change it (c) we measure it
18. 18.🌱 Is air needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
19. 19.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
20. 20.🧺 Do we need vinegar for the leafy bag test? (a) needed (b) not needed
21. 21.🧺 Which of these is not needed for sprouting seeds? (a) moong seeds (b) a few days (c) a balloon (d) water
22. 22.🍋 Secret message: who does this step — dipping the cotton bud? (a) an adult does it (b) a child can do it
23. 23.🧺 Which of these is not needed for the muddy water filter? (a) a clean glass (b) muddy water (c) cotton or cloth (d) a battery cell
24. 24.⚖️ 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 yeast (b) the water temperature (c) the amount of sugar (d) size of the balloon
25. 25.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) True (b) False
26. 26.True or false: cooking an egg is a change that can be undone. (a) True (b) False
27. 27.🫗 How do we separate gravel from fine sand? (a) evaporating (b) sieving (c) winnowing (d) handpicking
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) False (b) True
29. 29.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
30. 30.True or false: tamarind water is a base. (a) False (b) True
31. 31.🧺 Which of these is needed for the turmeric test? (a) soap solution (b) a balloon (c) a mirror (d) a magnet
32. 32.True or false: a battery cell is not needed for the turmeric test. (a) False (b) True
33. 33.🍋 Why does the lemon writing turn brown with heat? (a) paper turns lemony (b) the iron is brown (c) the juice scorches first (d) heat adds colour
34. 34.🧺 Do we need a battery cell for the leafy bag test? (a) needed (b) not needed
35. 35.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
36. 36.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
37. 37.True or false: husk from rice grain is done by evaporating. (a) False (b) True
38. 38.🛟 How should the plastic bag be tied around the branch? (a) with sharp wire (b) with a hot glue gun (c) as tight as possible (d) gently, not too tight
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 change it (b) we keep it the same (c) we measure it
40. 40.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown

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