Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 517 · 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.🫗 Why does filtered muddy water look clearer? (a) the filter adds soap (b) the water evaporates (c) the mud dissolves (d) the filter traps mud
2. 2.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) carbon dioxide gas (c) smoke (d) steam
3. 3.🧺 Which of these is not needed for making butter? (a) a balloon (b) a jar with a tight lid (c) a timer (d) a bowl
4. 4.⚖️ 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 keep it the same (b) we measure it (c) we change it
5. 5.True or false: salt from sea water is done by evaporating. (a) False (b) True
6. 6.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: size of the balloon is what we measure. (a) True (b) False
7. 7.🧺 Which of these is not needed for sprouting seeds? (a) a small bowl (b) a magnet (c) water (d) moong seeds
8. 8.🧺 Do we need a timer for making butter? (a) not needed (b) needed
9. 9.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it shrinks to nothing (c) it turns to bread (d) the balloon is smaller
10. 10.🧺 Do we need yeast for making butter? (a) needed (b) not needed
11. 11.🛟 Who should use the hot iron in the secret message experiment? (a) the youngest child (b) any child (c) whoever is fastest (d) only an adult
12. 12.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the kind of juice”? (a) we measure it (b) we change it (c) we keep it the same
13. 13.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) size of the balloon (b) spoons of baking soda (c) the kind of balloon (d) the amount of vinegar
14. 14.🧺 Which of these is needed for the muddy water filter? (a) sand and pebbles (b) turmeric powder (c) yeast (d) a balloon
15. 15.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the amount of vinegar is what we measure. (a) True (b) False
16. 16.🔍 Which is the odd one out? (a) cooking an egg (b) browning lemon ink (c) rusting iron (d) melting ice
17. 17.True or false: a battery cell is needed for the muddy water filter. (a) False (b) True
18. 18.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your school uniform (c) your best clothes (d) a white party dress
19. 19.True or false: water is not needed for sprouting seeds. (a) True (b) False
20. 20.🧺 Which of these is not needed for the yeast balloon? (a) turmeric powder (b) a small bottle (c) warm water (d) dry yeast
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we keep it the same (b) we change it (c) we measure it
22. 22.🧺 Do we need vinegar for the fizzy balloon? (a) not needed (b) needed
23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) True (b) False
24. 24.🧺 Do we need a clear plastic bag for the leafy bag test? (a) not needed (b) needed
25. 25.🧺 Do we need turmeric powder for the muddy water filter? (a) not needed (b) needed
26. 26.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: time to make butter is what we measure. (a) True (b) False
27. 27.True or false: freezing water is a change that cannot be undone. (a) True (b) False
28. 28.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the same paper (b) the ironing time (c) the same cotton bud (d) how dark the writing is
29. 29.True or false: cooking oil dissolves in water. (a) True (b) False
30. 30.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the filter material (b) the same glass (c) the amount poured (d) how clear the water is
31. 31.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) yeast (b) lemon juice (c) turmeric powder (d) a dropper or spoon
32. 32.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) the amount of vinegar (b) size of the balloon (c) the kind of balloon (d) the same bottle
33. 33.True or false: salt water turns turmeric reddish-brown. (a) False (b) True
34. 34.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) baking soda (c) sugar (d) a tray for spills
35. 35.⚖️ 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
36. 36.📘 What is yeast? (a) a kind of salt (b) a tiny living fungus (c) a kind of sugar (d) a kind of stone
37. 37.🌱 Which of these is not needed for a seed to sprout? (a) water (b) sunlight (c) warmth (d) air
38. 38.🧺 Do we need a mirror for the fizzy balloon? (a) needed (b) not needed
39. 39.🛟 The water for the yeast should be ___. (a) very salty (b) warm, not hot (c) boiling hot (d) ice cold
40. 40.🛟 What should you do if vinegar splashes in your eye? (a) add baking soda (b) ignore it (c) rinse with clean water (d) rub it hard

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