Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 750 · 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.🌱 Is salt needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
2. 2.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the iron setting”? (a) we keep it the same (b) we change it (c) we measure it
3. 3.🛟 Who should use the hot iron in the secret message experiment? (a) any child (b) whoever is fastest (c) only an adult (d) the youngest child
4. 4.🔍 Which is the odd one out? (a) baking soda water (b) sugar water (c) soap solution (d) detergent water
5. 5.🧺 Which of these is needed for the secret lemon message? (a) yeast (b) white paper (c) a mirror (d) a battery cell
6. 6.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) hot (b) salty (c) clearer (d) muddier
7. 7.🍋 What colour does the lemon writing turn when an adult warms it? (a) white (b) green (c) brown (d) blue
8. 8.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the amount of yeast (b) the amount of water (c) the water temperature (d) size of the balloon
9. 9.🧺 Which of these is needed for the muddy water filter? (a) yeast (b) a battery cell (c) turmeric powder (d) sand and pebbles
10. 10.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the water temperature”? (a) we keep it the same (b) we measure it (c) we change it
11. 11.🫧 Which of these is an acid? (a) baking soda water (b) plain water (c) soap solution (d) curd
12. 12.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) sunny or shady place (b) days to see crystals (c) the amount of salt
13. 13.True or false: a mirror is not needed for the fizzy balloon. (a) True (b) False
14. 14.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns black (c) it stays yellow (d) it turns red
15. 15.🧺 Which of these is needed for the leafy bag test? (a) vinegar (b) a rubber band (c) a mirror (d) yeast
16. 16.🧺 Which of these is not needed for the leafy bag test? (a) yeast (b) sunlight (c) a clear plastic bag (d) a few hours
17. 17.🍋 Secret message: who does this step — plugging in the iron? (a) a child can do it (b) an adult does it
18. 18.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) a battery cell (d) a shallow dish
19. 19.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “how hard we shake”? (a) we change it (b) we measure it (c) we keep it the same
20. 20.🧺 Do we need a battery cell for the fizzy balloon? (a) needed (b) not needed
21. 21.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “sun or shade”? (a) we keep it the same (b) we measure it (c) we change it
22. 22.🧺 Which of these is not needed for the fizzy balloon? (a) a comb (b) a tray for spills (c) an empty bottle (d) vinegar
23. 23.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) yeast (b) turmeric powder (c) white paper strips (d) soap solution
24. 24.🔍 Which is the odd one out? (a) sugar water (b) detergent water (c) plain water (d) salt water
25. 25.🫗 How do we separate bad grains from rice? (a) winnowing (b) filtering (c) evaporating (d) handpicking
26. 26.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) how clear the water is (b) the same funnel (c) the amount poured (d) the same glass
27. 27.True or false: lemon juice is not needed for the secret lemon message. (a) True (b) False
28. 28.🧺 Do we need a balloon for the secret lemon message? (a) not needed (b) needed
29. 29.🫗 How do we separate husk from rice grain? (a) evaporating (b) filtering (c) winnowing (d) handpicking
30. 30.🪴 Through which part does a plant take in water from the soil? (a) the leaves (b) the fruits (c) the roots (d) the flowers
31. 31.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) time to make butter (b) the cream temperature (c) the amount of cream (d) the same jar
32. 32.🌱 Which of these is needed for a seed to sprout? (a) salt (b) soil (c) water (d) sugar
33. 33.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) cotton or cloth (b) a mirror (c) sand and pebbles (d) a clean glass
34. 34.🔮 Predict: the adult irons for only one second. What happens? (a) writing turns green (b) it gets darker (c) writing stays faint (d) the paper floats
35. 35.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to make bread rise (c) to colour rice (d) to clean floors
36. 36.True or false: plain water is neutral. (a) True (b) False
37. 37.⚖️ Fair test — do seeds need water to sprout? True or false: the same bowls is the one thing we change. (a) True (b) False
38. 38.🍋 Secret message: who does this step — reading the message? (a) a child can do it (b) an adult does it
39. 39.🍋 Secret message: who does this step — ironing the paper? (a) an adult does it (b) a child can do it
40. 40.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True

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