Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 299 · 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 of these is not needed for sprouting seeds? (a) a small bowl (b) water (c) a battery cell (d) cotton wool
2. 2.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is what we measure. (a) False (b) True
3. 3.🪴 Which part of a plant does this job: take in water from soil? (a) flower (b) stem (c) roots (d) leaves
4. 4.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
5. 5.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the kind of juice (b) the ironing time (c) the same paper (d) the iron setting
6. 6.⚖️ 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) amount of water drops (c) sun or shade (d) the time we wait
7. 7.⚖️ Fair test — do seeds need water to sprout? What do we do with “the kind of seeds”? (a) we keep it the same (b) we measure it (c) we change it
8. 8.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) detergent water (d) lemon juice
9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we measure it (c) we change it
10. 10.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we change it (b) we keep it the same (c) we measure it
11. 11.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the amount poured”? (a) we change it (b) we keep it the same (c) we measure it
12. 12.⚖️ 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 measure it (b) we keep it the same (c) we change it
13. 13.🔍 What do you see after shaking cream in a jar for a long time? (a) clear water only (b) lumps of butter (c) bubbles of gas (d) sugar crystals
14. 14.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) folding paper (c) dissolving salt (d) browning lemon ink
15. 15.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a rubber band (b) a magnet (c) sunlight (d) a clear plastic bag
16. 16.True or false: warm water is needed for growing salt crystals. (a) True (b) False
17. 17.🧺 Which of these is not needed for the leafy bag test? (a) a potted plant (b) a battery cell (c) a few hours (d) a rubber band
18. 18.⚖️ 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) True (b) False
19. 19.True or false: a magnet is needed for making butter. (a) False (b) True
20. 20.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
21. 21.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it grows much faster (c) it bursts at once (d) it turns yellow
22. 22.🧺 Which of these is not needed for sprouting seeds? (a) a few days (b) turmeric powder (c) cotton wool (d) a small bowl
23. 23.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) yes, they sprout (b) they turn to stones (c) they melt (d) no, never
24. 24.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) turmeric powder (d) warm water
25. 25.🧺 Do we need a battery cell for the leafy bag test? (a) needed (b) not needed
26. 26.True or false: plugging in the iron is a job for an adult. (a) True (b) False
27. 27.True or false: folding paper is a change that cannot be undone. (a) False (b) True
28. 28.True or false: baking soda water keeps turmeric yellow. (a) False (b) True
29. 29.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) a small bowl (c) a magnet (d) lemon juice
30. 30.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a balloon (c) lemon juice (d) white paper strips
31. 31.🪴 Which part of a plant does this job: carry water upward? (a) leaves (b) flower (c) stem (d) roots
32. 32.🛟 Who should use the hot iron in the secret message experiment? (a) the youngest child (b) any child (c) whoever is fastest (d) only an adult
33. 33.🧺 Do we need yeast for the leafy bag test? (a) needed (b) not needed
34. 34.🍋 Secret message: who does this step — reading the message? (a) a child can do it (b) an adult does it
35. 35.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False
36. 36.🫗 Which of these is done by handpicking? (a) bran from wheat flour (b) husk from rice grain (c) chaff from wheat grain (d) bad grains from rice
37. 37.True or false: a tray for spills is needed for the fizzy balloon. (a) False (b) True
38. 38.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) a tray for spills (c) a battery cell (d) a funnel or spoon
39. 39.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) an empty bottle (b) a balloon (c) a funnel or spoon (d) a magnet
40. 40.🔮 The fizzing stops after a while. Why? (a) the balloon got cold (b) the gas froze (c) an ingredient ran out (d) the bottle got tired

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