Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 919 · 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.🌱 Why do the seeds on dry cotton not sprout? (a) they have no salt (b) they have no water (c) they are too wet (d) they have no soil
2. 2.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a mirror (b) white paper (c) lemon juice (d) an adult with an iron
3. 3.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
4. 4.True or false: a seed is needed for the fizzy balloon. (a) True (b) False
5. 5.🛟 Who should use the hot iron in the secret message experiment? (a) only an adult (b) whoever is fastest (c) any child (d) the youngest child
6. 6.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it floats on top (b) it dissolves (c) it sinks to the bottom (d) it turns to sand
7. 7.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “amount of water drops”? (a) we change it (b) we measure it (c) we keep it the same
8. 8.True or false: browning lemon ink is a change that cannot be undone. (a) False (b) True
9. 9.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) hydrogen (b) carbon dioxide (c) helium (d) oxygen
10. 10.🔍 Which is the odd one out? (a) letting the paper dry (b) writing the message (c) reading the message (d) plugging in the iron
11. 11.⚖️ 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
12. 12.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a few hours (b) a battery cell (c) sunlight (d) a potted plant
13. 13.🧺 Which of these is needed for the leafy bag test? (a) a mirror (b) a magnet (c) yeast (d) a few hours
14. 14.🧺 Which of these is needed for the yeast balloon? (a) a small bottle (b) a mirror (c) turmeric powder (d) a paper clip
15. 15.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) pour it down the sink (c) throw it at a wall (d) keep it for a month
16. 16.🧈 Which of these is a change that can be undone? (a) rusting iron (b) baking a cake (c) melting ice (d) cooking an egg
17. 17.🧺 Do we need cotton or cloth for the muddy water filter? (a) not needed (b) needed
18. 18.🔍 Which is the odd one out? (a) letting the paper dry (b) writing the message (c) putting the iron away (d) dipping the cotton bud
19. 19.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) sugar (c) turmeric powder (d) a magnet
20. 20.🫗 How do we separate salt from sea water? (a) winnowing (b) sieving (c) filtering (d) evaporating
21. 21.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a shallow dish (c) salt (d) a mirror
23. 23.True or false: a battery cell is not needed for making butter. (a) True (b) False
24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) dry yeast (d) a battery cell
25. 25.True or false: detergent water keeps turmeric yellow. (a) True (b) False
26. 26.True or false: baking soda is not needed for the fizzy balloon. (a) True (b) False
27. 27.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the amount of cream is kept the same. (a) True (b) False
28. 28.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) sand and pebbles (b) a magnet (c) muddy water (d) a funnel
29. 29.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) a balloon (c) a clean glass (d) a funnel
30. 30.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) the kind of balloon (b) spoons of baking soda (c) the same bottle (d) size of the balloon
31. 31.🪴 Where did the water inside the bag come from? (a) the plastic (b) the leaves (c) the rubber band (d) the rain
32. 32.🧺 Which of these is not needed for the muddy water filter? (a) a battery cell (b) a clean glass (c) muddy water (d) a funnel
33. 33.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
34. 34.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the ironing time (b) the same paper (c) how dark the writing is (d) the kind of juice
35. 35.🍋 Why can’t you see the lemon writing once it dries? (a) the ink is magnetic (b) dry juice is see-through (c) the paper ate it (d) it turned into air
36. 36.🔍 Which is the odd one out? (a) time (b) vinegar (c) sugar (d) warm water
37. 37.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
38. 38.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
39. 39.True or false: a mirror is needed for the fizzy balloon. (a) True (b) False
40. 40.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it

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