Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 549 · 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.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) sip each liquid (c) mix bathroom cleaners (d) use only kitchen items
2. 2.True or false: cooking an egg is a change that cannot be undone. (a) False (b) True
3. 3.🫧 Which of these is neutral? (a) curd (b) detergent water (c) orange juice (d) sugar water
4. 4.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
5. 5.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is the one thing we change. (a) False (b) True
6. 6.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) a funnel or spoon (c) a mirror (d) vinegar
7. 7.🛟 The water for the yeast should be ___. (a) warm, not hot (b) ice cold (c) boiling hot (d) very salty
8. 8.🛟 What should you do if vinegar splashes in your eye? (a) rinse with clean water (b) add baking soda (c) ignore it (d) rub it hard
9. 9.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is the one thing we change. (a) True (b) False
10. 10.True or false: yeast is needed for the secret lemon message. (a) True (b) False
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we keep it the same (b) we change it (c) we measure it
12. 12.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: how clear the water is is kept the same. (a) True (b) False
13. 13.🧺 Do we need a few days for sprouting seeds? (a) needed (b) not needed
14. 14.True or false: lemon juice is not needed for the secret lemon message. (a) True (b) False
15. 15.🌱 Which of these is needed for a seed to sprout? (a) salt (b) sunlight (c) warmth (d) sugar
16. 16.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the same funnel (b) the same muddy water (c) how clear the water is (d) the filter material
17. 17.🛟 Who should use the hot iron in the secret message experiment? (a) whoever is fastest (b) any child (c) the youngest child (d) only an adult
18. 18.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) turmeric powder (c) a mirror (d) water
19. 19.True or false: gravel from fine sand is done by sieving. (a) True (b) False
20. 20.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same cotton bud”? (a) we measure it (b) we change it (c) we keep it the same
21. 21.🔍 Which is the odd one out? (a) baking a cake (b) rusting iron (c) melting ice (d) cooking an egg
22. 22.🫧 Is sugar water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
23. 23.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) vinegar (c) plain water (d) soap solution
24. 24.🧺 Which of these is not needed for making butter? (a) cold water to rinse (b) a timer (c) yeast (d) a jar with a tight lid
25. 25.🛟 Why must a plastic bag never go over anyone’s head? (a) it gets wet (b) it can block breathing (c) it is too big (d) it changes colour
26. 26.🔮 Can the brown writing go back to being invisible? (a) no, it stays brown (b) yes, if cooled (c) yes, if shaken (d) yes, in the dark
27. 27.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) a potted plant (c) a rubber band (d) a mirror
28. 28.🍋 Secret message: who does this step — plugging in the iron? (a) an adult does it (b) a child can do it
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we keep it the same (b) we measure it (c) we change it
30. 30.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny spheres (c) tiny cubes (d) tiny triangles
31. 31.⚖️ 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
32. 32.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) True (b) False
33. 33.🪴 Which of these is a job of the leaves? (a) hold up the leaves (b) make seeds (c) hold the plant in soil (d) give out water vapour
34. 34.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is the one thing we change. (a) True (b) False
35. 35.🔍 Which is the odd one out? (a) salt water (b) lemon juice (c) detergent water (d) vinegar
36. 36.True or false: muddy water is not needed for the muddy water filter. (a) True (b) False
37. 37.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) the filter material (b) the same funnel (c) how clear the water is
38. 38.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
39. 39.True or false: sugar is not needed for the fizzy balloon. (a) True (b) False
40. 40.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed

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