Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 648 · 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? Which of these is the one thing we change? (a) size of the balloon (b) the kind of balloon (c) spoons of baking soda (d) the same bottle
2. 2.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) put it in your mouth (c) seal it in a glass jar (d) keep it away from eyes
3. 3.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is what we measure. (a) True (b) False
4. 4.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we measure it (b) we keep it the same (c) we change it
5. 5.True or false: melting ice is a change that can be undone. (a) False (b) True
6. 6.🍋 Why can’t you see the lemon writing once it dries? (a) the paper ate it (b) the ink is magnetic (c) it turned into air (d) dry juice is see-through
7. 7.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the mud (b) the water (c) the salt (d) nothing
8. 8.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) melting ice (c) milk turning to curd (d) baking a cake
9. 9.⚖️ 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 measure it (c) we keep it the same
10. 10.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a few days (b) water (c) a battery cell (d) cotton wool
11. 11.🧂 Which of these does not dissolve in water? (a) baking soda (b) sugar (c) glucose powder (d) sand
12. 12.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same cotton bud is kept the same. (a) False (b) True
13. 13.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a seed (b) a funnel or spoon (c) a tray for spills (d) an empty bottle
14. 14.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a rubber band (b) a few hours (c) a potted plant (d) yeast
15. 15.True or false: a clean glass is not needed for the muddy water filter. (a) False (b) True
16. 16.True or false: an empty bottle is needed for the fizzy balloon. (a) False (b) True
17. 17.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we keep it the same (b) we change it (c) we measure it
18. 18.⚖️ Fair test — do seeds need water to sprout? What do we do with “wet or dry cotton”? (a) we keep it the same (b) we measure it (c) we change it
19. 19.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
20. 20.🔮 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
21. 21.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the kind of juice”? (a) we keep it the same (b) we change it (c) we measure it
22. 22.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same funnel is kept the same. (a) False (b) True
23. 23.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) bright blue (c) reddish (d) white at once
24. 24.🧺 Which of these is needed for the muddy water filter? (a) a funnel (b) turmeric powder (c) a balloon (d) a mirror
25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we change it (c) we measure it
26. 26.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a magnet (c) a battery cell (d) dry yeast
27. 27.True or false: baking soda water turns turmeric reddish-brown. (a) True (b) False
28. 28.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting butter (c) dissolving salt (d) rusting iron
29. 29.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the amount of vinegar is the one thing we change. (a) False (b) True
30. 30.🧺 Which of these is not needed for the fizzy balloon? (a) a tray for spills (b) a battery cell (c) a funnel or spoon (d) a balloon
31. 31.🔍 Which is the odd one out? (a) air (b) warmth (c) water (d) soil
32. 32.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it glows (c) the yeast is killed (d) it turns to sugar
33. 33.🛟 Why must a plastic bag never go over anyone’s head? (a) it changes colour (b) it gets wet (c) it can block breathing (d) it is too big
34. 34.True or false: a comb is not needed for the fizzy balloon. (a) False (b) True
35. 35.🔍 Which is the odd one out? (a) plain water (b) detergent water (c) sugar water (d) salt water
36. 36.True or false: a few days is needed for sprouting seeds. (a) True (b) False
37. 37.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) water evaporates (c) the dish melts (d) salt grows roots
38. 38.True or false: salt is not needed for a seed to sprout. (a) True (b) False
39. 39.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a battery cell (c) a spoon (d) warm water
40. 40.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed

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