Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 715 · 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 — 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 turmeric paper
2. 2.True or false: dipping the cotton bud is a job for an adult. (a) True (b) False
3. 3.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
4. 4.🫗 Which of these is done by evaporating? (a) bad grains from rice (b) bran from wheat flour (c) sugar from sugar water (d) tea leaves from tea
5. 5.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) hydrogen (b) helium (c) carbon dioxide (d) oxygen
6. 6.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same funnel is kept the same. (a) False (b) True
7. 7.🧺 Do we need a mirror for sprouting seeds? (a) needed (b) not needed
8. 8.🪴 Which of these is a job of the roots? (a) make food in sunlight (b) make seeds (c) hold the plant in soil (d) give out water vapour
9. 9.⚖️ 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 change it (c) we measure it
10. 10.🧺 Do we need white paper for the secret lemon message? (a) not needed (b) needed
11. 11.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a balloon (b) a magnet (c) vinegar (d) a funnel or spoon
12. 12.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) a white party dress (c) your school uniform (d) an old shirt or apron
13. 13.True or false: a few days is not needed for sprouting seeds. (a) True (b) False
14. 14.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a funnel or spoon (b) a mirror (c) baking soda (d) a tray for spills
15. 15.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it stays yellow (c) it turns blue (d) reddish-brown
16. 16.True or false: yeast is needed for the turmeric test. (a) True (b) False
17. 17.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) turmeric powder (c) dry yeast (d) warm water
18. 18.🔍 Which is the odd one out? (a) lemon juice (b) soap solution (c) baking soda water (d) detergent water
19. 19.True or false: husk from rice grain is done by winnowing. (a) False (b) True
20. 20.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) salt (d) time
21. 21.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
22. 22.⚖️ 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) amount of water drops (b) the size of the plant (c) sun or shade (d) the kind of plant
23. 23.⚖️ 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) amount of water drops (b) the size of the plant (c) sun or shade
24. 24.True or false: mud from water is done by handpicking. (a) True (b) False
25. 25.🔍 What do you see after shaking cream in a jar for a long time? (a) clear water only (b) bubbles of gas (c) lumps of butter (d) sugar crystals
26. 26.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold slows yeast down (c) cold makes it pink (d) cold kills sugar
27. 27.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we change it (b) we measure it (c) we keep it the same
28. 28.True or false: tamarind water keeps turmeric yellow. (a) True (b) False
29. 29.True or false: plain water is a base. (a) True (b) False
30. 30.🧺 Which of these is needed for the leafy bag test? (a) a mirror (b) a few hours (c) yeast (d) turmeric powder
31. 31.🛟 What should you do if vinegar splashes in your eye? (a) add baking soda (b) rub it hard (c) rinse with clean water (d) ignore it
32. 32.🧂 Which of these does not dissolve in water? (a) chalk powder (b) food colour (c) table salt (d) glucose powder
33. 33.🌱 Will these sprout: boiled seeds? (a) does not sprout (b) sprouts
34. 34.🔍 Which is the odd one out? (a) tamarind water (b) sugar water (c) salt water (d) plain water
35. 35.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is the one thing we change? (a) the amount of sugar (b) the amount of yeast (c) the water temperature (d) the same bottles
36. 36.🫧 Which of these is neutral? (a) detergent water (b) curd (c) sugar water (d) tamarind water
37. 37.📘 Leaves have tiny holes that let out water vapour. What are they called? (a) veins (b) petals (c) roots (d) stomata
38. 38.🫧 Which of these is an acid? (a) soap solution (b) salt water (c) vinegar (d) sugar water
39. 39.🟡 Which of these keeps turmeric yellow? (a) salt water (b) soap solution (c) detergent water (d) baking soda water
40. 40.🍋 Which of these steps is a job a child can do? (a) letting the paper dry (b) cutting the lemon (c) putting the iron away (d) plugging in the iron

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