Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 55 · 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.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) soap solution (c) lemon juice (d) vinegar
2. 2.🛟 Which safety rule fits the fizzy balloon experiment? (a) put it in your mouth (b) keep it away from eyes (c) shake it near your face (d) seal it in a glass jar
3. 3.True or false: dissolving salt is a change that cannot be undone. (a) False (b) True
4. 4.🍋 What colour does the lemon writing turn when an adult warms it? (a) blue (b) green (c) white (d) brown
5. 5.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same bowls”? (a) we keep it the same (b) we change it (c) we measure it
6. 6.🧺 Do we need yeast for making butter? (a) not needed (b) needed
7. 7.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a magnet (c) salt (d) yeast
8. 8.True or false: a funnel is needed for the muddy water filter. (a) True (b) False
9. 9.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
10. 10.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) a rainbow (b) almost nothing (c) dark brown words (d) blue words
11. 11.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a magnet (b) baking soda (c) a balloon (d) an empty bottle
12. 12.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) oxygen (b) carbon dioxide (c) helium (d) hydrogen
13. 13.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) cotton or cloth (b) yeast (c) muddy water (d) sand and pebbles
14. 14.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) lemon juice (b) white paper (c) a cotton bud (d) yeast
15. 15.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is kept the same. (a) False (b) True
16. 16.🫗 How do we separate salt from sea water? (a) filtering (b) winnowing (c) handpicking (d) evaporating
17. 17.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) soap solution (c) a magnet (d) turmeric powder
18. 18.🛟 Why must the jar lid be screwed on tightly? (a) so it turns yellow (b) so it gets hot (c) so cream does not spill (d) so air gets out
19. 19.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns black (c) it turns red (d) it stays yellow
20. 20.📘 Is the fizzing a sign that a new substance is made? (a) yes, a new gas forms (b) no, nothing changes (c) it is only dissolving (d) it is only melting
21. 21.🧺 Which of these is not needed for the yeast balloon? (a) a magnet (b) dry yeast (c) sugar (d) a balloon
22. 22.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is the one thing we change. (a) True (b) False
23. 23.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) time to make butter (b) the cream temperature (c) the amount of cream (d) how hard we shake
24. 24.🧺 Do we need a timer for making butter? (a) not needed (b) needed
25. 25.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) skip washing (b) wash your hands (c) rub your eyes (d) lick your fingers
26. 26.🔍 Which is the odd one out? (a) chalk powder (b) sawdust (c) cooking oil (d) sugar
27. 27.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) sand and pebbles (b) muddy water (c) a magnet (d) a funnel
28. 28.🧺 Which of these is needed for the muddy water filter? (a) a magnet (b) a funnel (c) a battery cell (d) turmeric powder
29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) a small bottle (c) a balloon (d) dry yeast
30. 30.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) a cotton bud (c) white paper (d) a balloon
31. 31.🛟 What should you do after touching soil or seeds? (a) wash your hands (b) skip washing (c) rub your eyes (d) lick your fingers
32. 32.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we change it (b) we keep it the same (c) we measure it
33. 33.🛟 What should you do if vinegar splashes in your eye? (a) rinse with clean water (b) ignore it (c) add baking soda (d) rub it hard
34. 34.True or false: browning lemon ink is a change that cannot be undone. (a) True (b) False
35. 35.🔮 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
36. 36.🧺 Do we need sunlight for the leafy bag test? (a) needed (b) not needed
37. 37.🍞 Why do we add sugar to the yeast? (a) to make it heavy (b) it is food for yeast (c) to colour it (d) to make it sweet
38. 38.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) sand and pebbles (b) a balloon (c) a clean glass (d) cotton or cloth
39. 39.True or false: a battery cell is not needed for the fizzy balloon. (a) False (b) True
40. 40.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) size of the balloon (b) spoons of baking soda (c) the amount of vinegar

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids