Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 204 · 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: detergent water is a base. (a) True (b) False
2. 2.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the amount of water (b) size of the balloon (c) the water temperature (d) the amount of yeast
3. 3.🫗 How do we separate sugar from sugar water? (a) handpicking (b) filtering (c) evaporating (d) winnowing
4. 4.🧺 Do we need a magnet for the fizzy balloon? (a) needed (b) not needed
5. 5.🛟 Why must a plastic bag never go over anyone’s head? (a) it can block breathing (b) it changes colour (c) it gets wet (d) it is too big
6. 6.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is kept the same. (a) False (b) True
7. 7.🛟 What should you do if vinegar splashes in your eye? (a) rub it hard (b) ignore it (c) add baking soda (d) rinse with clean water
8. 8.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
9. 9.True or false: cooking an egg is a change that cannot be undone. (a) False (b) True
10. 10.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the same cotton bud (b) the iron setting (c) how dark the writing is (d) the same paper
11. 11.🔮 Predict: you use plain water instead of vinegar. What happens? (a) a huge eruption (b) it turns to honey (c) the balloon bursts (d) very little fizzing
12. 12.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the same paper (b) the kind of juice (c) how dark the writing is
13. 13.True or false: a cotton bud is needed for the secret lemon message. (a) True (b) False
14. 14.🛟 Why must the jar lid be screwed on tightly? (a) so it turns yellow (b) so it gets hot (c) so air gets out (d) so cream does not spill
15. 15.True or false: detergent water turns turmeric reddish-brown. (a) False (b) True
16. 16.🧺 Do we need a balloon for the secret lemon message? (a) not needed (b) needed
17. 17.True or false: salt from sea water is done by winnowing. (a) False (b) True
18. 18.⚖️ 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
19. 19.⚖️ Fair test — do seeds need water to sprout? What do we do with “wet or dry cotton”? (a) we measure it (b) we keep it the same (c) we change it
20. 20.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the kind of plant”? (a) we change it (b) we keep it the same (c) we measure it
21. 21.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
22. 22.🍞 Which of these is something yeast does not need? (a) warm water (b) salt (c) sugar (d) time
23. 23.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) bigger crystals (c) smaller crystals (d) no crystals
24. 24.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) warm water (c) a balloon (d) a mirror
25. 25.🧺 Do we need a mirror for the fizzy balloon? (a) needed (b) not needed
26. 26.🛟 How should the plastic bag be tied around the branch? (a) as tight as possible (b) with sharp wire (c) with a hot glue gun (d) gently, not too tight
27. 27.🧺 Which of these is needed for the leafy bag test? (a) yeast (b) turmeric powder (c) sunlight (d) a magnet
28. 28.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) use only kitchen items (c) mix bathroom cleaners (d) sip each liquid
29. 29.True or false: an empty bottle is not needed for the fizzy balloon. (a) True (b) False
30. 30.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) sugar (b) baking soda (c) a tray for spills (d) an empty bottle
31. 31.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) white paper (c) a magnet (d) a small bowl
32. 32.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) throw them at friends (b) feed them to pets (c) eat a few to check (d) never put seeds in mouth
33. 33.🧺 Which of these is needed for the muddy water filter? (a) a magnet (b) a clean glass (c) a balloon (d) a battery cell
34. 34.🧺 Do we need fresh cream for making butter? (a) needed (b) not needed
35. 35.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it sinks to the bottom (b) it dissolves (c) it floats on top (d) it turns to sand
36. 36.🫧 Which of these is an acid? (a) detergent water (b) baking soda water (c) orange juice (d) salt water
37. 37.True or false: tamarind water is neutral. (a) False (b) True
38. 38.True or false: a dropper or spoon is needed for the turmeric test. (a) False (b) True
39. 39.True or false: a potted plant is needed for the leafy bag test. (a) False (b) True
40. 40.🔍 Which is the odd one out? (a) rusting iron (b) folding paper (c) melting butter (d) melting ice

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