Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 394 · 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.🌱 Is sunlight needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
2. 2.⚖️ 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 measure it (c) we keep it the same
3. 3.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we change it (b) we measure it (c) we keep it the same
4. 4.🛟 What should you do if vinegar splashes in your eye? (a) rub it hard (b) ignore it (c) rinse with clean water (d) add baking soda
5. 5.True or false: soap solution is neutral. (a) True (b) False
6. 6.🛟 Why must the jar lid be screwed on tightly? (a) so it gets hot (b) so it turns yellow (c) so cream does not spill (d) so air gets out
7. 7.🧺 Do we need a magnet for the fizzy balloon? (a) not needed (b) needed
8. 8.🧺 Which of these is not needed for the fizzy balloon? (a) vinegar (b) an empty bottle (c) a funnel or spoon (d) a battery cell
9. 9.True or false: sugar is needed for the fizzy balloon. (a) True (b) False
10. 10.True or false: a mirror is needed for the fizzy balloon. (a) False (b) True
11. 11.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) the cream temperature (b) how hard we shake (c) time to make butter (d) the same jar
12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we keep it the same (b) we measure it (c) we change it
13. 13.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) a mirror (d) salt
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a battery cell (c) salt (d) a piece of string
16. 16.True or false: sugar is something yeast needs. (a) False (b) True
17. 17.🧺 Do we need muddy water for the muddy water filter? (a) needed (b) not needed
18. 18.True or false: an adult with an iron is needed for the secret lemon message. (a) True (b) False
19. 19.True or false: sugar is something yeast does not need. (a) False (b) True
20. 20.True or false: a mirror is not needed for the turmeric test. (a) False (b) True
21. 21.True or false: turmeric powder is needed for making butter. (a) False (b) True
22. 22.🫗 Which of these is done by evaporating? (a) mud from water (b) salt from sea water (c) husk from rice grain (d) small stones from dal
23. 23.🧺 Which of these is needed for making butter? (a) a balloon (b) a mirror (c) a battery cell (d) a timer
24. 24.True or false: a comb is needed for the yeast balloon. (a) False (b) True
25. 25.⚖️ 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
26. 26.🫗 Why does filtered muddy water look clearer? (a) the water evaporates (b) the filter traps mud (c) the mud dissolves (d) the filter adds soap
27. 27.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
28. 28.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the kind of juice (b) the same cotton bud (c) the same paper (d) the ironing time
29. 29.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns black (c) it turns red (d) it turns blue
30. 30.True or false: lemon juice is a base. (a) True (b) False
31. 31.🌱 Which of these is needed for a seed to sprout? (a) sugar (b) soil (c) water (d) sunlight
32. 32.True or false: carry water upward is a job of the stem. (a) False (b) True
33. 33.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
34. 34.True or false: salt is not needed for a seed to sprout. (a) False (b) True
35. 35.True or false: plugging in the iron is a job for an adult. (a) False (b) True
36. 36.🔍 Which is the odd one out? (a) plugging in the iron (b) ironing the paper (c) reading the message (d) cutting the lemon
37. 37.🌱 Which of these sprouts in a few days? (a) seeds on wet cotton (b) seeds in the freezer (c) seeds on dry cotton (d) boiled seeds
38. 38.🍞 Which of these is something yeast does not need? (a) time (b) salt (c) warm water (d) sugar
39. 39.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) the same bowls (b) the number of seeds (c) wet or dry cotton (d) how many seeds sprout
40. 40.🌱 Where does a sprouting seed get its first food from? (a) the cotton wool (b) the sunlight only (c) the air (d) food stored in the seed

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