Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 112 · 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 — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is kept the same. (a) True (b) False
2. 2.True or false: a seed is not needed for the fizzy balloon. (a) True (b) False
3. 3.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
4. 4.🪴 Where did the water inside the bag come from? (a) the rubber band (b) the rain (c) the plastic (d) the leaves
5. 5.True or false: sugar is something yeast needs. (a) True (b) False
6. 6.🧺 Do we need turmeric powder for the leafy bag test? (a) needed (b) not needed
7. 7.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
8. 8.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we keep it the same (b) we measure it (c) we change it
9. 9.🔍 Which is the odd one out? (a) chalk powder (b) food colour (c) cooking oil (d) small pebbles
10. 10.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) how clear the water is (b) the filter material (c) the same muddy water
11. 11.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is smaller (c) it shrinks to nothing (d) the balloon is bigger
12. 12.True or false: a balloon is needed for the yeast balloon. (a) True (b) False
13. 13.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a magnet (b) a rubber band (c) a clear plastic bag (d) a potted plant
14. 14.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) both the same (b) the hot sunny day (c) neither of them (d) the cool cloudy day
15. 15.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns yellow again (b) it turns darker red (c) it turns blue (d) it disappears
16. 16.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) throw it at a wall (c) put it in your mouth (d) pour it down the sink
17. 17.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) spoons of baking soda (b) the amount of vinegar (c) the same bottle (d) the kind of balloon
18. 18.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) dry yeast (c) a balloon (d) a paper clip
19. 19.🫧 Is plain water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
20. 20.🛟 Who should use the hot iron in the secret message experiment? (a) any child (b) whoever is fastest (c) only an adult (d) the youngest child
21. 21.🔮 Can the brown writing go back to being invisible? (a) no, it stays brown (b) yes, if cooled (c) yes, in the dark (d) yes, if shaken
22. 22.🧺 Do we need yeast for making butter? (a) not needed (b) needed
23. 23.True or false: boiled seeds does not sprout. (a) True (b) False
24. 24.🧺 Which of these is not needed for the fizzy balloon? (a) baking soda (b) a tray for spills (c) vinegar (d) a mirror
25. 25.🫧 Which of these is a base? (a) salt water (b) vinegar (c) tamarind water (d) detergent water
26. 26.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a mirror (c) sugar (d) a balloon
27. 27.🔍 Which is the odd one out? (a) plain water (b) vinegar (c) baking soda water (d) salt water
28. 28.True or false: gravel from fine sand is done by sieving. (a) True (b) False
29. 29.True or false: husk from rice grain is done by winnowing. (a) True (b) False
30. 30.🪴 Which of these is a job of the roots? (a) give out water vapour (b) take in water from soil (c) make seeds (d) make food in sunlight
31. 31.🛟 What should you do if vinegar splashes in your eye? (a) ignore it (b) add baking soda (c) rinse with clean water (d) rub it hard
32. 32.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
33. 33.🔮 Predict: the jar is filled right to the top with cream. What happens? (a) it is much faster (b) it makes salt (c) it takes much longer (d) it turns pink
34. 34.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a tray for spills (b) vinegar (c) sugar (d) baking soda
35. 35.True or false: soap solution is not needed for the turmeric test. (a) True (b) False
36. 36.🧺 Do we need a mirror for the secret lemon message? (a) needed (b) not needed
37. 37.True or false: turmeric powder is needed for the secret lemon message. (a) False (b) True
38. 38.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
39. 39.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we keep it the same (b) we measure it (c) we change it
40. 40.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we keep it the same (b) we measure it (c) we change it

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