Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 829 · 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.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we keep it the same (b) we measure it (c) we change it
2. 2.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) vinegar (d) detergent water
3. 3.🧺 Which of these is not needed for the muddy water filter? (a) cotton or cloth (b) a battery cell (c) a funnel (d) muddy water
4. 4.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) spoons of baking soda (b) size of the balloon (c) the kind of balloon
5. 5.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) False (b) True
6. 6.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is what we measure. (a) True (b) False
7. 7.🧺 Which of these is needed for making butter? (a) a magnet (b) fresh cream (c) a battery cell (d) turmeric powder
8. 8.🌱 Is sunlight needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
9. 9.🔮 Predict: you use plain water instead of vinegar. What happens? (a) the balloon bursts (b) a huge eruption (c) very little fizzing (d) it turns to honey
10. 10.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a mirror (c) dry yeast (d) a battery cell
11. 11.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is the one thing we change. (a) False (b) True
12. 12.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a small bowl (b) a few days (c) a mirror (d) water
13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) dry yeast (c) a mirror (d) warm water
14. 14.🧺 Which of these is needed for the muddy water filter? (a) a balloon (b) a battery cell (c) a mirror (d) a clean glass
15. 15.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the cream temperature”? (a) we keep it the same (b) we change it (c) we measure it
16. 16.🍞 Which of these is something yeast does not need? (a) warm water (b) vinegar (c) sugar (d) time
17. 17.🧺 Do we need yeast for sprouting seeds? (a) needed (b) not needed
18. 18.🧺 Do we need yeast for the secret lemon message? (a) needed (b) not needed
19. 19.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) fresh cream (b) a timer (c) a bowl (d) a mirror
20. 20.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
21. 21.🫗 Why does filtered muddy water look clearer? (a) the filter adds soap (b) the water evaporates (c) the filter traps mud (d) the mud dissolves
22. 22.True or false: an empty bottle is not needed for the fizzy balloon. (a) True (b) False
23. 23.True or false: yeast is not needed for the secret lemon message. (a) False (b) True
24. 24.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) skip washing (b) lick your fingers (c) rub your eyes (d) wash your hands
25. 25.🧺 Which of these is not needed for sprouting seeds? (a) cotton wool (b) a mirror (c) water (d) moong seeds
26. 26.True or false: cotton or cloth is needed for the muddy water filter. (a) True (b) False
27. 27.🧺 Which of these is needed for the muddy water filter? (a) turmeric powder (b) a balloon (c) cotton or cloth (d) a magnet
28. 28.🧺 Do we need white paper for the secret lemon message? (a) not needed (b) needed
29. 29.🫧 Which of these is a base? (a) vinegar (b) baking soda water (c) curd (d) lemon juice
30. 30.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) tiny water drops (b) nothing at all (c) tiny insects (d) salt crystals
31. 31.🛟 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
32. 32.🪴 Which of these is a job of the stem? (a) make food in sunlight (b) take in water from soil (c) give out water vapour (d) carry water upward
33. 33.🧺 Which of these is needed for the fizzy balloon? (a) a mirror (b) a magnet (c) a seed (d) baking soda
34. 34.🛟 What should you do if vinegar splashes in your eye? (a) rub it hard (b) ignore it (c) rinse with clean water (d) add baking soda
35. 35.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
36. 36.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
37. 37.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) lemon juice (c) water (d) a balloon
38. 38.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) turmeric powder (c) a piece of string (d) warm water
39. 39.True or false: vinegar is needed for the leafy bag test. (a) True (b) False
40. 40.True or false: make seeds is a job of the stem. (a) True (b) False

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