Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 35 · 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 yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is the one thing we change. (a) True (b) False
2. 2.True or false: turmeric powder is not needed for the secret lemon message. (a) True (b) False
3. 3.🍋 What colour does the lemon writing turn when an adult warms it? (a) brown (b) green (c) white (d) blue
4. 4.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is what we measure? (a) the kind of plant (b) the size of the plant (c) amount of water drops (d) the time we wait
5. 5.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) sugar (c) turmeric powder (d) a magnet
6. 6.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) sand and pebbles (b) a clean glass (c) cotton or cloth (d) yeast
7. 7.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is kept the same. (a) True (b) False
8. 8.🔍 Which is the odd one out? (a) salt water (b) sugar water (c) plain water (d) lemon juice
9. 9.🧺 Which of these is not needed for the leafy bag test? (a) a battery cell (b) a few hours (c) sunlight (d) a clear plastic bag
10. 10.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) size of the balloon (b) the amount of vinegar (c) spoons of baking soda (d) the kind of balloon
11. 11.True or false: baking a cake is a change that can be undone. (a) False (b) True
12. 12.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) a rainbow (b) blue words (c) almost nothing (d) dark brown words
13. 13.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a rubber band (b) a mirror (c) a clear plastic bag (d) a potted plant
14. 14.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the same paper (b) the iron setting (c) how dark the writing is (d) the kind of juice
15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) False (b) True
16. 16.⚖️ 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) the same kind of bag (b) the time we wait (c) sun or shade (d) the size of the plant
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) a shallow dish (c) salt (d) a piece of string
18. 18.🧺 Which of these is needed for growing salt crystals? (a) warm water (b) a balloon (c) a battery cell (d) turmeric powder
19. 19.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the amount poured”? (a) we measure it (b) we change it (c) we keep it the same
20. 20.🌱 Which of these is not needed for a seed to sprout? (a) water (b) warmth (c) sunlight (d) air
21. 21.🔍 Which is the odd one out? (a) browning lemon ink (b) baking a cake (c) folding paper (d) cooking an egg
22. 22.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is kept the same? (a) sun or shade (b) the kind of plant (c) amount of water drops
23. 23.True or false: yeast is not needed for the turmeric test. (a) False (b) True
24. 24.🧺 Do we need a magnet for the secret lemon message? (a) needed (b) not needed
25. 25.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) warm, not hot (d) very salty
26. 26.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) turmeric powder (c) white paper strips (d) a comb
27. 27.🧺 Which of these is not needed for making butter? (a) a balloon (b) fresh cream (c) a timer (d) cold water to rinse
28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is the one thing we change. (a) True (b) False
29. 29.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) keep it for a month (c) pour it down the sink (d) throw it at a wall
30. 30.True or false: chaff from wheat grain is done by winnowing. (a) False (b) True
31. 31.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
32. 32.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is kept the same. (a) False (b) True
33. 33.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) False (b) True
34. 34.⚖️ 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
35. 35.True or false: a funnel is needed for the muddy water filter. (a) False (b) True
36. 36.🌱 Why do the seeds on dry cotton not sprout? (a) they have no salt (b) they are too wet (c) they have no soil (d) they have no water
37. 37.True or false: a magnet is needed for sprouting seeds. (a) False (b) True
38. 38.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) sugar water (c) soap solution (d) vinegar
39. 39.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a magnet (c) warm water (d) dry yeast
40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we measure it (b) we change it (c) we keep it the same

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