Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 634 · 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 is not needed for making butter? (a) a jar with a tight lid (b) a battery cell (c) a bowl (d) fresh cream
2. 2.True or false: yeast is not needed for sprouting seeds. (a) True (b) False
3. 3.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
4. 4.🍋 Why does the lemon writing turn brown with heat? (a) heat adds colour (b) the iron is brown (c) paper turns lemony (d) the juice scorches first
5. 5.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) tiny insects (b) tiny water drops (c) nothing at all (d) salt crystals
6. 6.🧺 Which of these is not needed for the secret lemon message? (a) a cotton bud (b) a small bowl (c) white paper (d) a balloon
7. 7.🫗 Which of these is done by evaporating? (a) chaff from wheat grain (b) husk from rice grain (c) small stones from dal (d) salt from sea water
8. 8.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the kind of juice (b) the same paper (c) the ironing time (d) how dark the writing is
9. 9.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) eat a few to check (b) throw them at friends (c) feed them to pets (d) never put seeds in mouth
10. 10.🫗 Which of these is done by handpicking? (a) sugar from sugar water (b) bad grains from rice (c) gravel from fine sand (d) bran from wheat flour
11. 11.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) it fills with soil (b) much more water (c) exactly the same (d) much less water
12. 12.True or false: wet seeds in the dark does not sprout. (a) False (b) True
13. 13.True or false: a potted plant is needed for the leafy bag test. (a) True (b) False
14. 14.🫧 Which of these is a base? (a) orange juice (b) curd (c) detergent water (d) tamarind water
15. 15.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) vinegar (c) a tray for spills (d) a magnet
16. 16.🔍 Which is the odd one out? (a) water (b) warmth (c) air (d) salt
17. 17.🌱 Where does a sprouting seed get its first food from? (a) the cotton wool (b) the air (c) food stored in the seed (d) the sunlight only
18. 18.🔍 Which is the odd one out? (a) sawdust (b) sugar (c) glucose powder (d) table salt
19. 19.📘 What do we call a seed starting to grow? (a) evaporation (b) pollination (c) germination (d) condensation
20. 20.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the same bottles (b) the water temperature (c) size of the balloon
21. 21.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
22. 22.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is what we measure. (a) True (b) False
23. 23.🫧 Which of these is neutral? (a) detergent water (b) vinegar (c) sugar water (d) soap solution
24. 24.🧺 Which of these is needed for the muddy water filter? (a) a funnel (b) yeast (c) a mirror (d) a magnet
25. 25.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
26. 26.🔮 Predict: you stop shaking after only one minute. What do you have? (a) cheese (b) ghee (c) butter lumps (d) still runny cream
27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) True (b) False
28. 28.🔍 Which is the odd one out? (a) baking soda water (b) vinegar (c) soap solution (d) detergent water
29. 29.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) soap solution (c) sugar water (d) vinegar
30. 30.⚖️ 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
31. 31.🍋 What colour does the lemon writing turn when an adult warms it? (a) blue (b) white (c) brown (d) green
32. 32.🧺 Do we need a mirror for making butter? (a) not needed (b) needed
33. 33.🔍 What do you see after shaking cream in a jar for a long time? (a) clear water only (b) sugar crystals (c) lumps of butter (d) bubbles of gas
34. 34.🔍 Which is the odd one out? (a) soil (b) salt (c) air (d) sugar
35. 35.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the ironing time is the one thing we change. (a) True (b) False
36. 36.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny stars (c) tiny spheres (d) tiny triangles
37. 37.🫗 Is filtered pond water safe to drink? (a) yes, if it is clear (b) yes, if it is cold (c) yes, always (d) no, germs may stay
38. 38.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) a small bottle (c) warm water (d) dry yeast
39. 39.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold kills sugar (c) cold makes it pink (d) cold slows yeast down
40. 40.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we keep it the same (b) we measure it (c) we change it

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