Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 48 · 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 — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) False (b) True
2. 2.⚖️ Fair test — do seeds need water to sprout? True or false: the number of seeds is what we measure. (a) False (b) True
3. 3.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) folding paper (c) melting butter (d) melting ice
4. 4.🧺 Which of these is not needed for the muddy water filter? (a) muddy water (b) turmeric powder (c) sand and pebbles (d) a funnel
5. 5.🍋 Why can’t you see the lemon writing once it dries? (a) dry juice is see-through (b) the ink is magnetic (c) the paper ate it (d) it turned into air
6. 6.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
7. 7.🧺 Which of these is needed for the muddy water filter? (a) a battery cell (b) a mirror (c) cotton or cloth (d) a magnet
8. 8.🔍 Which is the odd one out? (a) dissolving salt (b) freezing water (c) folding paper (d) cooking an egg
9. 9.🛟 Why is a plastic jar a good choice for shaking? (a) it is hotter (b) it is heavier (c) it will not break (d) it is magnetic
10. 10.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the same cotton bud (b) the kind of juice (c) how dark the writing is
11. 11.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) leaves pass through (b) leaves stay behind (c) tea stays behind (d) both stay behind
12. 12.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a battery cell (c) white paper strips (d) a mirror
13. 13.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) the same glass (b) the filter material (c) how clear the water is (d) the same funnel
14. 14.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to colour rice (c) to wash dishes (d) to clean floors
15. 15.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) yeast (b) a clean glass (c) cotton or cloth (d) muddy water
16. 16.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) dark brown words (b) blue words (c) a rainbow (d) almost nothing
17. 17.🍋 Secret message: who does this step — writing the message? (a) an adult does it (b) a child can do it
18. 18.🧺 Which of these is not needed for the fizzy balloon? (a) a magnet (b) vinegar (c) a funnel or spoon (d) an empty bottle
19. 19.True or false: carry water upward is a job of the leaves. (a) True (b) False
20. 20.🫗 How do we separate sugar from sugar water? (a) handpicking (b) sieving (c) winnowing (d) evaporating
21. 21.🔍 Which is the odd one out? (a) sugar (b) time (c) warm water (d) vinegar
22. 22.True or false: reading the message is a job a child can do. (a) False (b) True
23. 23.⚖️ 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 measure it (b) we keep it the same (c) we change it
24. 24.True or false: wet seeds by a window sprouts in a few days. (a) False (b) True
25. 25.True or false: a funnel is not needed for the muddy water filter. (a) False (b) True
26. 26.🛟 What should you do after touching soil or seeds? (a) skip washing (b) lick your fingers (c) wash your hands (d) rub your eyes
27. 27.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the amount of vinegar (b) the same bottle (c) spoons of baking soda (d) the kind of balloon
28. 28.🌱 Which of these is not needed for a seed to sprout? (a) air (b) water (c) warmth (d) soil
29. 29.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a small bottle (c) sugar (d) a magnet
30. 30.🛟 How should the plastic bag be tied around the branch? (a) as tight as possible (b) gently, not too tight (c) with sharp wire (d) with a hot glue gun
31. 31.🧺 Which of these is not needed for the muddy water filter? (a) muddy water (b) a magnet (c) cotton or cloth (d) a clean glass
32. 32.🧺 Do we need yeast for sprouting seeds? (a) not needed (b) needed
33. 33.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it fizz (c) to make it very salty (d) to change its colour
34. 34.🪴 Which of these is a job of the leaves? (a) carry water upward (b) make food in sunlight (c) make seeds (d) hold the plant in soil
35. 35.🧺 Which of these is needed for making butter? (a) a battery cell (b) turmeric powder (c) a balloon (d) a timer
36. 36.🪴 Which part of a plant does this job: take in water from soil? (a) flower (b) roots (c) leaves (d) stem
37. 37.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) yeast (d) a shallow dish
38. 38.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) a white party dress (c) an old shirt or apron (d) your best clothes
39. 39.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same muddy water”? (a) we change it (b) we measure it (c) we keep it the same
40. 40.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) water (b) a few days (c) a mirror (d) a small bowl

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