Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 447 · 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 lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we measure it (b) we change it (c) we keep it the same
2. 2.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
3. 3.🛟 Why must children keep their fingers away from the iron? (a) it is sticky (b) it is magnetic (c) it is cold (d) it can burn skin
4. 4.🔍 Which is the odd one out? (a) lemon juice (b) soap solution (c) baking soda water (d) detergent water
5. 5.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of sugar”? (a) we keep it the same (b) we change it (c) we measure it
6. 6.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the ironing time”? (a) we measure it (b) we change it (c) we keep it the same
7. 7.🧂 Which of these dissolves in water? (a) sugar (b) cooking oil (c) small pebbles (d) sawdust
8. 8.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns red (c) it turns black (d) it stays yellow
9. 9.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a battery cell (c) sugar (d) warm water
10. 10.🧺 Which of these is needed for the secret lemon message? (a) white paper (b) a magnet (c) a battery cell (d) yeast
11. 11.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) the amount of cream (b) the same jar (c) how hard we shake (d) the cream temperature
12. 12.🧺 Which of these is needed for the fizzy balloon? (a) a battery cell (b) a seed (c) a mirror (d) baking soda
13. 13.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
14. 14.🔍 Which is the odd one out? (a) sunlight (b) air (c) warmth (d) water
15. 15.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) sunlight (b) a clear plastic bag (c) a battery cell (d) a rubber band
16. 16.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold makes it pink (c) cold kills sugar (d) cold slows yeast down
17. 17.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
18. 18.🧺 Do we need a battery cell for the fizzy balloon? (a) needed (b) not needed
19. 19.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the amount of vinegar is the one thing we change. (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: salt is something yeast needs. (a) False (b) True
22. 22.🫗 Which of these is done by filtering? (a) bad grains from rice (b) tea leaves from tea (c) small stones from dal (d) sugar from sugar water
23. 23.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) True (b) False
24. 24.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) a mirror (c) lemon juice (d) turmeric powder
25. 25.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
26. 26.🔍 Which is the odd one out? (a) plugging in the iron (b) ironing the paper (c) writing the message (d) putting the iron away
27. 27.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a potted plant (b) a rubber band (c) sunlight (d) a magnet
28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the number of drops (c) the liquid we test (d) the light we look in
29. 29.🧺 Which of these is not needed for the muddy water filter? (a) a funnel (b) sand and pebbles (c) cotton or cloth (d) a battery cell
30. 30.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the kind of plant is the one thing we change. (a) False (b) True
31. 31.🧺 Which of these is not needed for making butter? (a) a battery cell (b) a jar with a tight lid (c) cold water to rinse (d) a bowl
32. 32.🔍 Which is the odd one out? (a) soap solution (b) orange juice (c) lemon juice (d) vinegar
33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the turmeric paper (c) the liquid we test
34. 34.🌱 Which of these does not sprout? (a) seeds on wet cotton (b) seeds on dry cotton (c) wet seeds in the dark (d) wet seeds by a window
35. 35.🫧 Which of these is neutral? (a) plain water (b) soap solution (c) baking soda water (d) curd
36. 36.🍋 Which of these steps is a job for an adult? (a) letting the paper dry (b) reading the message (c) plugging in the iron (d) writing the message
37. 37.🫧 Which of these is a base? (a) plain water (b) detergent water (c) lemon juice (d) orange juice
38. 38.🌱 Which of these sprouts in a few days? (a) wet seeds in the dark (b) boiled seeds (c) seeds on dry cotton (d) seeds in the freezer
39. 39.True or false: a paper clip is needed for the yeast balloon. (a) False (b) True
40. 40.🧺 Do we need a cotton bud for the secret lemon message? (a) not needed (b) needed

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