Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 710 · 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 — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the amount of salt (b) the amount of water (c) sunny or shady place (d) days to see crystals
2. 2.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) dissolving salt (c) cooking an egg (d) browning lemon ink
3. 3.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) True (b) False
4. 4.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
5. 5.🔍 Which is the odd one out? (a) letting the paper dry (b) ironing the paper (c) reading the message (d) writing the message
6. 6.🔍 Which is the odd one out? (a) a magnet (b) warm water (c) sugar (d) time
7. 7.True or false: freezing water is a change that cannot be undone. (a) True (b) False
8. 8.True or false: hold up the leaves is a job of the stem. (a) False (b) True
9. 9.🌱 Which of these does not sprout? (a) seeds on dry cotton (b) wet seeds by a window (c) wet seeds in the dark (d) seeds on wet cotton
10. 10.🫧 Which of these is an acid? (a) plain water (b) soap solution (c) orange juice (d) sugar water
11. 11.True or false: a balloon is needed for the yeast balloon. (a) False (b) True
12. 12.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) a tray for spills (c) a mirror (d) an empty bottle
13. 13.🧺 Do we need a battery cell for the fizzy balloon? (a) not needed (b) needed
14. 14.🍋 Which of these steps is a job for an adult? (a) ironing the paper (b) letting the paper dry (c) dipping the cotton bud (d) reading the message
15. 15.🧺 Do we need a timer for making butter? (a) needed (b) not needed
16. 16.🍋 Secret message: who does this step — ironing the paper? (a) a child can do it (b) an adult does it
17. 17.🧺 Do we need a tray for spills for the fizzy balloon? (a) needed (b) not needed
18. 18.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a mirror (c) dry yeast (d) sugar
19. 19.🪴 Which of these is a job of the roots? (a) hold up the leaves (b) hold the plant in soil (c) carry water upward (d) make seeds
20. 20.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
21. 21.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
22. 22.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) a rainbow (b) blue words (c) almost nothing (d) dark brown words
23. 23.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a rubber band (b) vinegar (c) a few hours (d) a clear plastic bag
24. 24.⚖️ 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) the time we wait (b) amount of water drops (c) sun or shade
25. 25.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
26. 26.🫗 Which of these is done by evaporating? (a) bran from wheat flour (b) bad grains from rice (c) salt from sea water (d) small stones from dal
27. 27.True or false: reading the message is a job for an adult. (a) False (b) True
28. 28.🛟 The water for the yeast should be ___. (a) warm, not hot (b) boiling hot (c) ice cold (d) very salty
29. 29.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) melting butter (c) cooking an egg (d) freezing water
30. 30.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it grows much faster (c) it turns yellow (d) it grows very little
31. 31.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) sunlight (b) yeast (c) a few hours (d) a potted plant
32. 32.🧺 Do we need a magnet for the fizzy balloon? (a) not needed (b) needed
33. 33.🔍 Which is the odd one out? (a) sunlight (b) a magnet (c) vinegar (d) time
34. 34.True or false: putting the iron away is a job for an adult. (a) True (b) False
35. 35.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is the one thing we change. (a) False (b) True
36. 36.🪴 Which of these is a job of the stem? (a) hold the plant in soil (b) take in water from soil (c) carry water upward (d) make seeds
37. 37.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a battery cell (c) white paper strips (d) lemon juice
38. 38.True or false: water is needed for the turmeric test. (a) False (b) True
39. 39.True or false: cotton or cloth is needed for the muddy water filter. (a) True (b) False
40. 40.🟡 Which of these turns turmeric paper reddish-brown? (a) soap solution (b) sugar water (c) vinegar (d) lemon juice

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