Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 2 · 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.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your best clothes (c) a white party dress (d) your school uniform
2. 2.🫧 Is orange juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
3. 3.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) they turn to stones (b) yes, they sprout (c) they melt (d) no, never
4. 4.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) the same muddy water (b) how clear the water is (c) the filter material
5. 5.True or false: a bowl is needed for making butter. (a) False (b) True
6. 6.True or false: tamarind water turns turmeric reddish-brown. (a) True (b) False
7. 7.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the size of the plant”? (a) we measure it (b) we keep it the same (c) we change it
8. 8.⚖️ 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 change it (b) we keep it the same (c) we measure it
9. 9.🍞 Which of these is something yeast needs? (a) sunlight (b) a magnet (c) salt (d) warm water
10. 10.🌱 Which of these does not sprout? (a) wet seeds in the dark (b) wet seeds by a window (c) seeds on wet cotton (d) seeds on dry cotton
11. 11.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a small bowl (b) moong seeds (c) turmeric powder (d) cotton wool
12. 12.🧺 Do we need a balloon for the fizzy balloon? (a) needed (b) not needed
13. 13.🛟 What should you do after handling muddy water? (a) wash hands afterwards (b) wipe hands on face (c) nothing is needed (d) lick your fingers
14. 14.True or false: sugar water keeps turmeric yellow. (a) True (b) False
15. 15.🧺 Which of these is needed for the muddy water filter? (a) a battery cell (b) a funnel (c) yeast (d) a mirror
16. 16.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: time to make butter is what we measure. (a) False (b) True
17. 17.⚖️ Fair test — do seeds need water to sprout? What do we do with “the number of seeds”? (a) we keep it the same (b) we change it (c) we measure it
18. 18.🔮 Predict: you use plain water instead of vinegar. What happens? (a) the balloon bursts (b) a huge eruption (c) very little fizzing (d) it turns to honey
19. 19.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
20. 20.🧺 Which of these is needed for sprouting seeds? (a) a battery cell (b) a balloon (c) a small bowl (d) yeast
21. 21.🌱 Which of these does not sprout? (a) wet seeds by a window (b) seeds on wet cotton (c) wet seeds in the dark (d) boiled seeds
22. 22.🧺 Do we need fresh cream for making butter? (a) not needed (b) needed
23. 23.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) milk turning to curd (c) folding paper (d) melting butter
24. 24.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they freeze (b) they react (c) they become magnets (d) they float apart
25. 25.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns blue (b) it turns yellow again (c) it turns darker red (d) it disappears
26. 26.True or false: yeast is not needed for the muddy water filter. (a) True (b) False
27. 27.True or false: vinegar is not needed for the leafy bag test. (a) True (b) False
28. 28.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
29. 29.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
30. 30.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) warm water (d) a battery cell
31. 31.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same muddy water”? (a) we keep it the same (b) we change it (c) we measure it
32. 32.True or false: baking soda water is a base. (a) False (b) True
33. 33.🧺 Do we need lemon juice for the secret lemon message? (a) not needed (b) needed
34. 34.🧺 Which of these is not needed for making butter? (a) cold water to rinse (b) yeast (c) a jar with a tight lid (d) a timer
35. 35.True or false: a magnet is not needed for growing salt crystals. (a) True (b) False
36. 36.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) a magnet (c) lemon juice (d) a cotton bud
37. 37.🫗 Is filtered pond water safe to drink? (a) yes, if it is clear (b) yes, always (c) yes, if it is cold (d) no, germs may stay
38. 38.🍋 Which of these steps is a job for an adult? (a) reading the message (b) cutting the lemon (c) letting the paper dry (d) writing the message
39. 39.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) the same dish (c) sunny or shady place
40. 40.True or false: cooking oil dissolves in water. (a) True (b) False

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