Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 981 · 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 lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we keep it the same (b) we change it (c) we measure it
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) sunny or shady place (c) the kind of salt
3. 3.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the iron setting (b) the same paper (c) the ironing time (d) how dark the writing is
4. 4.🧺 Do we need a magnet for the muddy water filter? (a) not needed (b) needed
5. 5.🍋 Why can’t you see the lemon writing once it dries? (a) the paper ate it (b) it turned into air (c) dry juice is see-through (d) the ink is magnetic
6. 6.⚖️ Fair test — do seeds need water to sprout? What do we do with “how many seeds sprout”? (a) we keep it the same (b) we measure it (c) we change it
7. 7.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) hydrogen (b) oxygen (c) helium (d) carbon dioxide
8. 8.🔍 Which is the odd one out? (a) plain water (b) lemon juice (c) baking soda water (d) salt water
9. 9.True or false: a potted plant is needed for the leafy bag test. (a) False (b) True
10. 10.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the amount of yeast (c) the water temperature
11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is what we measure. (a) False (b) True
12. 12.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the same bottle”? (a) we keep it the same (b) we change it (c) we measure it
13. 13.🔍 Which is the odd one out? (a) sawdust (b) food colour (c) small pebbles (d) sand
14. 14.True or false: reading the message is a job for an adult. (a) True (b) False
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) False (b) True
16. 16.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a magnet (c) turmeric powder (d) salt
17. 17.True or false: turmeric powder is not needed for the muddy water filter. (a) False (b) True
18. 18.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we change it (b) we measure it (c) we keep it the same
19. 19.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
20. 20.True or false: sugar water is neutral. (a) True (b) False
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we keep it the same (b) we change it (c) we measure it
22. 22.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
23. 23.🍋 Which of these steps is a job for an adult? (a) reading the message (b) ironing the paper (c) letting the paper dry (d) writing the message
24. 24.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the amount of vinegar is what we measure. (a) False (b) True
25. 25.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) turmeric powder (b) lemon juice (c) a small bowl (d) a cotton bud
26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) the amount of salt (b) the amount of water (c) the same dish (d) sunny or shady place
27. 27.True or false: detergent water keeps turmeric yellow. (a) True (b) False
28. 28.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the cream temperature”? (a) we change it (b) we measure it (c) we keep it the same
29. 29.True or false: yeast is needed for the turmeric test. (a) True (b) False
30. 30.🛟 Why must the jar lid be screwed on tightly? (a) so it turns yellow (b) so cream does not spill (c) so it gets hot (d) so air gets out
31. 31.True or false: yeast is needed for the secret lemon message. (a) False (b) True
32. 32.🪴 Which part of a plant does this job: give out water vapour? (a) stem (b) roots (c) leaves (d) flower
33. 33.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they grow fruit (b) they glow (c) they sprout faster (d) they do not sprout
34. 34.🫧 Is soap solution an acid, a base or neutral? (a) a base (b) neutral (c) an acid
35. 35.⚖️ 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
36. 36.True or false: a seed is needed for the fizzy balloon. (a) False (b) True
37. 37.🪴 Which of these is a job of the flower? (a) make seeds (b) hold the plant in soil (c) make food in sunlight (d) carry water upward
38. 38.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) yeast (b) a few days (c) a small bowl (d) moong seeds
39. 39.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) exactly the same (b) it fills with soil (c) much less water (d) much more water
40. 40.⚖️ 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) sun or shade (b) the same kind of bag (c) the kind of plant (d) the time we wait

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