Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 151 · 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 safety rule fits the fizzy balloon experiment? (a) seal it in a glass jar (b) put it in your mouth (c) keep it away from eyes (d) shake it near your face
2. 2.🔍 Which is the odd one out? (a) small pebbles (b) chalk powder (c) baking soda (d) sand
3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the liquid we test (c) the light we look in
4. 4.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we measure it (b) we keep it the same (c) we change it
5. 5.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) bright blue (c) green (d) reddish
6. 6.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a small bottle (c) turmeric powder (d) a paper clip
7. 7.🔮 The fizzing stops after a while. Why? (a) the gas froze (b) the balloon got cold (c) the bottle got tired (d) an ingredient ran out
8. 8.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we measure it (b) we keep it the same (c) we change it
9. 9.🪴 Which part of a plant does this job: carry water upward? (a) flower (b) stem (c) roots (d) leaves
10. 10.True or false: a clear plastic bag is not needed for the leafy bag test. (a) True (b) False
11. 11.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
12. 12.True or false: curd is an acid. (a) True (b) False
13. 13.🔍 Which is the odd one out? (a) dipping the cotton bud (b) letting the paper dry (c) writing the message (d) cutting the lemon
14. 14.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) freezing water (c) cooking an egg (d) folding paper
15. 15.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
16. 16.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) the cream temperature (b) the same jar (c) time to make butter
17. 17.🫗 How do we separate bran from wheat flour? (a) handpicking (b) winnowing (c) sieving (d) filtering
18. 18.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the colour we see (b) the light we look in (c) the turmeric paper (d) the liquid we test
19. 19.🧺 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) a mirror
20. 20.🪴 Which of these is a job of the flower? (a) hold the plant in soil (b) carry water upward (c) make seeds (d) give out water vapour
21. 21.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) spoons of baking soda (b) the amount of vinegar (c) size of the balloon (d) the kind of balloon
22. 22.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) sunlight (b) a magnet (c) a few hours (d) a rubber band
23. 23.🌱 Which of these sprouts in a few days? (a) boiled seeds (b) wet seeds in the dark (c) seeds on dry cotton (d) seeds in the freezer
24. 24.True or false: mud from water is done by evaporating. (a) False (b) True
25. 25.🧺 Do we need a tray for spills for the fizzy balloon? (a) not needed (b) needed
26. 26.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny stars (c) tiny triangles (d) tiny spheres
27. 27.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the same cotton bud (b) the iron setting (c) the kind of juice (d) how dark the writing is
28. 28.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) water (c) yeast (d) a mirror
29. 29.🧺 Which of these is not needed for the yeast balloon? (a) a mirror (b) a balloon (c) a small bottle (d) warm water
30. 30.True or false: a few hours is not needed for the leafy bag test. (a) True (b) False
31. 31.🔮 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
32. 32.🧈 Which of these is a change that can be undone? (a) rusting iron (b) browning lemon ink (c) freezing water (d) cooking an egg
33. 33.🧺 Do we need lemon juice for the secret lemon message? (a) needed (b) not needed
34. 34.True or false: a bowl is not needed for making butter. (a) True (b) False
35. 35.🪴 Where did the water inside the bag come from? (a) the plastic (b) the rubber band (c) the rain (d) the leaves
36. 36.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) few or no crystals (c) crystals grow faster (d) it turns sweet
37. 37.🪴 Which of these is a job of the roots? (a) give out water vapour (b) take in water from soil (c) make food in sunlight (d) hold up the leaves
38. 38.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) yeast (c) a dropper or spoon (d) white paper strips
39. 39.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns yellow again (b) it disappears (c) it turns blue (d) it turns darker red
40. 40.🌱 Which of these does not sprout? (a) boiled seeds (b) seeds on wet cotton (c) wet seeds in the dark (d) wet seeds by a window

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