Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 43 · 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.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it grows faster (c) it glows (d) it turns to sugar
2. 2.True or false: muddy water is not needed for the muddy water filter. (a) True (b) False
3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is the one thing we change. (a) True (b) False
4. 4.⚖️ 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) how dark the writing is (c) the same paper (d) the iron setting
5. 5.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
6. 6.True or false: sugar water is an acid. (a) False (b) True
7. 7.🧺 Do we need a magnet for the secret lemon message? (a) not needed (b) needed
8. 8.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the time we wait is kept the same. (a) False (b) True
9. 9.🧺 Do we need baking soda for the fizzy balloon? (a) needed (b) not needed
10. 10.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the amount of cream is what we measure. (a) True (b) False
11. 11.⚖️ 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
12. 12.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a friend who is running (d) a grown-up
13. 13.⚖️ 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
14. 14.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “time to make butter”? (a) we change it (b) we measure it (c) we keep it the same
15. 15.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a shallow dish (c) a balloon (d) a battery cell
16. 16.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) moong seeds (b) turmeric powder (c) water (d) a few days
17. 17.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) blue words (b) a rainbow (c) dark brown words (d) almost nothing
18. 18.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) size of the balloon (c) the amount of yeast
19. 19.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the filter material”? (a) we keep it the same (b) we measure it (c) we change it
20. 20.True or false: lemon juice is not needed for the secret lemon message. (a) False (b) True
21. 21.🍋 Secret message: who does this step — ironing the paper? (a) an adult does it (b) a child can do it
22. 22.🫗 How do we separate sugar from sugar water? (a) sieving (b) handpicking (c) filtering (d) evaporating
23. 23.🧺 Do we need vinegar for the fizzy balloon? (a) needed (b) not needed
24. 24.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) the number of seeds (b) wet or dry cotton (c) how many seeds sprout (d) the same bowls
25. 25.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) warm water (c) a mirror (d) a balloon
26. 26.🛟 What should you do after touching soil or seeds? (a) lick your fingers (b) rub your eyes (c) wash your hands (d) skip washing
27. 27.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) a mirror (c) lemon juice (d) a cotton bud
28. 28.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the iron setting is kept the same. (a) False (b) True
29. 29.🪴 Which of these is a job of the flower? (a) give out water vapour (b) hold the plant in soil (c) make seeds (d) hold up the leaves
30. 30.True or false: vinegar turns turmeric reddish-brown. (a) False (b) True
31. 31.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the same jar is the one thing we change. (a) True (b) False
32. 32.True or false: cold water to rinse is needed for making butter. (a) False (b) True
33. 33.🍞 Why do we add sugar to the yeast? (a) to make it sweet (b) it is food for yeast (c) to make it heavy (d) to colour it
34. 34.True or false: bran from wheat flour is done by winnowing. (a) True (b) False
35. 35.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) the cream temperature (b) the same jar (c) time to make butter
36. 36.🎈 What blows up the balloon in the yeast experiment? (a) carbon dioxide gas (b) steam (c) smoke (d) air from outside
37. 37.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
38. 38.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) turmeric powder (c) salt (d) a spoon
39. 39.🧺 Do we need a magnet for making butter? (a) needed (b) not needed
40. 40.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (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