Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 250 · 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.🧺 Do we need sunlight for the leafy bag test? (a) needed (b) not needed
2. 2.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the water temperature (c) the amount of water
3. 3.🌱 Which of these is not needed for a seed to sprout? (a) warmth (b) sunlight (c) water (d) air
4. 4.🫗 How do we separate bran from wheat flour? (a) sieving (b) winnowing (c) handpicking (d) filtering
5. 5.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) wash your hands (b) lick your fingers (c) rub your eyes (d) skip washing
6. 6.⚖️ 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
7. 7.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it bursts at once (c) it grows very little (d) it grows much faster
8. 8.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) warm water (d) a battery cell
9. 9.True or false: a magnet is needed for the leafy bag test. (a) True (b) False
10. 10.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a jar with a tight lid (b) a battery cell (c) a timer (d) fresh cream
11. 11.True or false: plain water is an acid. (a) False (b) True
12. 12.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
13. 13.True or false: lemon juice is needed for the turmeric test. (a) True (b) False
14. 14.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your school uniform (c) an old shirt or apron (d) your best clothes
15. 15.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “amount of water drops”? (a) we measure it (b) we change it (c) we keep it the same
16. 16.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) it shrinks to nothing (c) the balloon is bigger (d) it turns to bread
17. 17.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the amount of salt (b) sunny or shady place (c) days to see crystals
18. 18.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is what we measure. (a) True (b) False
19. 19.🍋 Why does the lemon writing turn brown with heat? (a) the iron is brown (b) paper turns lemony (c) heat adds colour (d) the juice scorches first
20. 20.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) white paper (c) a battery cell (d) a small bowl
21. 21.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) salt rains down (c) sea water evaporates (d) sand is ground up
22. 22.🍋 What colour does the lemon writing turn when an adult warms it? (a) brown (b) blue (c) green (d) white
23. 23.🟡 Which of these keeps turmeric yellow? (a) vinegar (b) detergent water (c) baking soda water (d) soap solution
24. 24.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the amount poured is the one thing we change. (a) False (b) True
25. 25.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it sinks to the bottom (b) it turns to sand (c) it dissolves (d) it floats on top
26. 26.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) soap solution (c) a balloon (d) a dropper or spoon
27. 27.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) the amount of salt (b) the same dish (c) sunny or shady place (d) days to see crystals
28. 28.🫗 Why does filtered muddy water look clearer? (a) the water evaporates (b) the filter adds soap (c) the filter traps mud (d) the mud dissolves
29. 29.🧺 Do we need a potted plant for the leafy bag test? (a) needed (b) not needed
30. 30.🔍 Which is the odd one out? (a) browning lemon ink (b) melting butter (c) dissolving salt (d) folding paper
31. 31.True or false: bad grains from rice is done by evaporating. (a) False (b) True
32. 32.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “how dark the writing is”? (a) we change it (b) we measure it (c) we keep it the same
33. 33.🧺 Which of these is needed for making butter? (a) turmeric powder (b) yeast (c) a magnet (d) a jar with a tight lid
34. 34.🧺 Do we need a balloon for making butter? (a) needed (b) not needed
35. 35.🧺 Do we need sugar for the fizzy balloon? (a) needed (b) not needed
36. 36.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) dark green (b) bright red (c) blue (d) pale yellow
37. 37.🛟 Why is a plastic jar a good choice for shaking? (a) it is hotter (b) it will not break (c) it is heavier (d) it is magnetic
38. 38.🔍 Which is the odd one out? (a) sugar (b) warm water (c) time (d) salt
39. 39.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) the yeast is killed (c) it grows faster (d) it turns to sugar
40. 40.🧺 Do we need a balloon for the fizzy balloon? (a) needed (b) not needed

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