Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 442 · 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.📘 What do we call a seed starting to grow? (a) germination (b) pollination (c) evaporation (d) condensation
2. 2.⚖️ 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 change it (c) we keep it the same
3. 3.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) more butter forms (b) no butter forms (c) it turns to cheese (d) it turns blue
4. 4.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
5. 5.🫗 Which of these is done by filtering? (a) tea leaves from tea (b) small stones from dal (c) salt from sea water (d) gravel from fine sand
6. 6.True or false: vinegar is neutral. (a) False (b) True
7. 7.🪴 Which part of a plant does this job: make food in sunlight? (a) stem (b) roots (c) flower (d) leaves
8. 8.True or false: yeast is needed for the secret lemon message. (a) False (b) True
9. 9.True or false: cooking an egg is a change that can be undone. (a) False (b) True
10. 10.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the time we wait is the one thing we change. (a) False (b) True
11. 11.🧺 Which of these is needed for the leafy bag test? (a) yeast (b) a battery cell (c) turmeric powder (d) a clear plastic bag
12. 12.True or false: lemon juice is needed for the turmeric test. (a) True (b) False
13. 13.🪴 Which part of a plant does this job: hold up the leaves? (a) leaves (b) stem (c) flower (d) roots
14. 14.True or false: plain water keeps turmeric yellow. (a) False (b) True
15. 15.🫧 Is salt water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
16. 16.True or false: a mirror is needed for the fizzy balloon. (a) True (b) False
17. 17.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) never put seeds in mouth (b) feed them to pets (c) throw them at friends (d) eat a few to check
18. 18.True or false: a comb is needed for the turmeric test. (a) False (b) True
19. 19.🧺 Which of these is needed for the leafy bag test? (a) turmeric powder (b) a few hours (c) vinegar (d) a battery cell
20. 20.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) size of the balloon (b) the same bottle (c) the kind of balloon (d) spoons of baking soda
21. 21.🍋 Which of these steps is a job for an adult? (a) writing the message (b) cutting the lemon (c) dipping the cotton bud (d) letting the paper dry
22. 22.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) your best clothes (c) a white party dress (d) an old shirt or apron
23. 23.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the same bottles (b) the amount of sugar (c) size of the balloon (d) the water temperature
24. 24.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) wash your hands (b) rub your eyes (c) lick your fingers (d) skip washing
25. 25.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns blue (c) it turns green (d) it stays yellow
26. 26.🧺 Do we need turmeric powder for the leafy bag test? (a) needed (b) not needed
27. 27.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) green (c) reddish (d) bright blue
28. 28.True or false: sunlight is not needed for the leafy bag test. (a) False (b) True
29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the light we look in (b) the colour we see (c) the turmeric paper (d) the number of drops
30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we measure it (c) we keep it the same
31. 31.🛟 What should you do after touching soil or seeds? (a) rub your eyes (b) wash your hands (c) skip washing (d) lick your fingers
32. 32.🧺 Do we need turmeric powder for sprouting seeds? (a) not needed (b) needed
33. 33.True or false: an empty bottle is needed for the fizzy balloon. (a) False (b) True
34. 34.🫗 Which of these is done by evaporating? (a) bad grains from rice (b) salt from sea water (c) tea leaves from tea (d) mud from water
35. 35.True or false: baking soda water is an acid. (a) False (b) True
36. 36.🧺 Do we need a clear plastic bag for the leafy bag test? (a) not needed (b) needed
37. 37.🪴 Which part of a plant does this job: carry water upward? (a) leaves (b) stem (c) flower (d) roots
38. 38.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns black (c) it turns blue (d) it stays yellow
39. 39.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the same bottle”? (a) we measure it (b) we keep it the same (c) we change it
40. 40.🍞 Which of these is something yeast needs? (a) salt (b) time (c) sunlight (d) a magnet

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