Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 532 · 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 — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we change it (b) we keep it the same (c) we measure it
2. 2.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
3. 3.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we measure it (b) we keep it the same (c) we change it
4. 4.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
5. 5.🔍 Which is the odd one out? (a) lemon juice (b) detergent water (c) baking soda water (d) soap solution
6. 6.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) rusting iron (c) melting butter (d) folding paper
7. 7.True or false: a clear plastic bag is not needed for the leafy bag test. (a) True (b) False
8. 8.🧺 Which of these is not needed for the fizzy balloon? (a) a tray for spills (b) a balloon (c) sugar (d) an empty bottle
9. 9.True or false: a battery cell is not needed for the fizzy balloon. (a) True (b) False
10. 10.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same muddy water is the one thing we change. (a) False (b) True
11. 11.🪴 Which part of a plant does this job: carry water upward? (a) roots (b) stem (c) leaves (d) flower
12. 12.🛟 What should you do after touching soil or seeds? (a) skip washing (b) rub your eyes (c) lick your fingers (d) wash your hands
13. 13.🧈 Which of these is a change that can be undone? (a) rusting iron (b) cooking an egg (c) dissolving salt (d) browning lemon ink
14. 14.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
15. 15.True or false: bran from wheat flour is done by handpicking. (a) True (b) False
16. 16.🫗 How do we separate gravel from fine sand? (a) filtering (b) sieving (c) evaporating (d) winnowing
17. 17.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
18. 18.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
19. 19.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we keep it the same (b) we measure it (c) we change it
21. 21.🫗 Is filtered pond water safe to drink? (a) yes, always (b) yes, if it is clear (c) yes, if it is cold (d) no, germs may stay
22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) a magnet (d) sugar
23. 23.🍋 Why does the lemon writing turn brown with heat? (a) heat adds colour (b) the juice scorches first (c) paper turns lemony (d) the iron is brown
24. 24.True or false: husk from rice grain is done by handpicking. (a) False (b) True
25. 25.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is the one thing we change. (a) True (b) False
26. 26.⚖️ Fair test — do seeds need water to sprout? What do we do with “wet or dry cotton”? (a) we change it (b) we keep it the same (c) we measure it
27. 27.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) yeast (d) a piece of string
29. 29.🧺 Do we need a magnet for the fizzy balloon? (a) needed (b) not needed
30. 30.True or false: moong seeds is needed for sprouting seeds. (a) True (b) False
31. 31.🧺 Which of these is not needed for the yeast balloon? (a) turmeric powder (b) a small bottle (c) dry yeast (d) sugar
32. 32.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same cotton bud is the one thing we change. (a) True (b) False
33. 33.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) the time we wait (b) sun or shade (c) amount of water drops (d) the kind of plant
34. 34.📘 What do we call something that changes colour to show an acid or a base? (a) a magnet (b) a prism (c) a pulley (d) an indicator
35. 35.🧺 Do we need yeast for the muddy water filter? (a) needed (b) not needed
36. 36.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a jar with a tight lid (b) cold water to rinse (c) fresh cream (d) a magnet
37. 37.True or false: salt is not needed for a seed to sprout. (a) True (b) False
38. 38.🫗 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
39. 39.⚖️ 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 keep it the same (c) we measure it
40. 40.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) detergent water (c) lemon juice (d) soap solution

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