Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 62 · 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.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) moong seeds (b) water (c) turmeric powder (d) a few days
2. 2.🍋 Secret message: who does this step — ironing the paper? (a) an adult does it (b) a child can do it
3. 3.True or false: lemon juice is not needed for the secret lemon message. (a) True (b) False
4. 4.True or false: warmth is not needed for a seed to sprout. (a) True (b) False
5. 5.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we measure it (b) we keep it the same (c) we change it
6. 6.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) detergent water (c) lemon juice (d) sugar water
7. 7.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) a balloon (c) a mirror (d) lemon juice
8. 8.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) True (b) False
9. 9.🧺 Which of these is not needed for the leafy bag test? (a) a rubber band (b) a mirror (c) a few hours (d) sunlight
10. 10.True or false: curd is an acid. (a) False (b) True
11. 11.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) throw them at friends (b) feed them to pets (c) never put seeds in mouth (d) eat a few to check
12. 12.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) the yeast is killed (c) it glows (d) it turns to sugar
13. 13.🪴 Which part of a plant does this job: make seeds? (a) leaves (b) stem (c) flower (d) roots
14. 14.🧺 Which of these is needed for the leafy bag test? (a) a clear plastic bag (b) a battery cell (c) yeast (d) vinegar
15. 15.True or false: white paper strips is needed for the turmeric test. (a) False (b) True
16. 16.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
17. 17.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) a potted plant (c) a magnet (d) sunlight
18. 18.🔍 Which is the odd one out? (a) milk turning to curd (b) rusting iron (c) freezing water (d) baking a cake
19. 19.True or false: a mirror is not needed for growing salt crystals. (a) False (b) True
20. 20.True or false: air is needed for a seed to sprout. (a) False (b) True
21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we change it (c) we keep it the same
22. 22.⚖️ Fair test — do seeds need water to sprout? True or false: the same place is kept the same. (a) False (b) True
23. 23.🪴 Where did the water inside the bag come from? (a) the plastic (b) the rain (c) the leaves (d) the rubber band
24. 24.True or false: ironing the paper is a job a child can do. (a) False (b) True
25. 25.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a funnel or spoon (b) a tray for spills (c) sugar (d) baking soda
26. 26.🌱 Will these sprout: seeds in the freezer? (a) does not sprout (b) sprouts
27. 27.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) a white party dress (c) an old shirt or apron (d) your best clothes
28. 28.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) cotton wool (b) water (c) moong seeds (d) yeast
29. 29.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a bowl (b) fresh cream (c) turmeric powder (d) a timer
30. 30.True or false: a tray for spills is not needed for the fizzy balloon. (a) True (b) False
31. 31.🧺 Do we need a magnet for the turmeric test? (a) not needed (b) needed
32. 32.True or false: a balloon is needed for making butter. (a) False (b) True
33. 33.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the cream temperature”? (a) we keep it the same (b) we measure it (c) we change it
34. 34.🍞 Which of these is something yeast does not need? (a) sugar (b) salt (c) warm water (d) time
35. 35.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the ironing time is the one thing we change. (a) False (b) True
36. 36.⚖️ 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 size of the plant (b) the same kind of bag (c) the kind of plant (d) amount of water drops
37. 37.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the same jar is kept the same. (a) True (b) False
38. 38.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) a few hours (c) a mirror (d) a potted plant
39. 39.True or false: sunlight is something yeast does not need. (a) False (b) True
40. 40.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) rusting iron (c) browning lemon ink (d) folding paper

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