Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 821 · 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.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) safe from small children (d) next to the baby
2. 2.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a mirror (b) a few hours (c) sunlight (d) a rubber band
3. 3.True or false: vinegar is a base. (a) True (b) False
4. 4.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same bowls”? (a) we keep it the same (b) we change it (c) we measure it
5. 5.🪴 Which part of a plant does this job: carry water upward? (a) flower (b) stem (c) leaves (d) roots
6. 6.🫧 Is salt water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
7. 7.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) milk turning to curd (c) browning lemon ink (d) freezing water
8. 8.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
9. 9.🫗 How do we separate bad grains from rice? (a) sieving (b) handpicking (c) filtering (d) winnowing
10. 10.⚖️ 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
11. 11.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the amount of cream is kept the same. (a) False (b) True
12. 12.⚖️ 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 change it (b) we measure it (c) we keep it the same
13. 13.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we measure it (b) we keep it the same (c) we change it
14. 14.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it grows very little (c) it turns yellow (d) it grows much faster
15. 15.🛟 How should the plastic bag be tied around the branch? (a) gently, not too tight (b) with a hot glue gun (c) with sharp wire (d) as tight as possible
16. 16.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
17. 17.⚖️ Fair test — do seeds need water to sprout? What do we do with “wet or dry cotton”? (a) we keep it the same (b) we measure it (c) we change it
18. 18.⚖️ 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
19. 19.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) yeast (c) salt (d) warm water
20. 20.🧺 Which of these is needed for sprouting seeds? (a) turmeric powder (b) a battery cell (c) a mirror (d) moong seeds
21. 21.🎈 Why does the balloon blow up? (a) vinegar is hot (b) the bottle shrinks (c) outside air gets in (d) gas is made inside
22. 22.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) cotton or cloth (b) muddy water (c) yeast (d) sand and pebbles
23. 23.🧺 Do we need sand and pebbles for the muddy water filter? (a) not needed (b) needed
24. 24.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) pour it down the sink (c) throw it at a wall (d) put it in your mouth
25. 25.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) leaves pass through (b) tea stays behind (c) both stay behind (d) leaves stay behind
26. 26.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the same paper (b) the same cotton bud (c) the iron setting (d) the kind of juice
27. 27.🫗 Which of these is done by handpicking? (a) husk from rice grain (b) mud from water (c) small stones from dal (d) salt from sea water
28. 28.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) the same jar (b) time to make butter (c) the cream temperature (d) the amount of cream
29. 29.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is kept the same. (a) False (b) True
30. 30.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) False (b) True
32. 32.⚖️ Fair test — do seeds need water to sprout? True or false: the kind of seeds is what we measure. (a) False (b) True
33. 33.🧺 Which of these is not needed for the secret lemon message? (a) lemon juice (b) an adult with an iron (c) a balloon (d) white paper
34. 34.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sip each liquid (c) use only kitchen items (d) sniff each bottle hard
35. 35.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) freezing water (c) melting butter (d) browning lemon ink
36. 36.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) white paper strips (c) a balloon (d) turmeric powder
37. 37.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) exactly the same (b) much less water (c) it fills with soil (d) much more water
38. 38.⚖️ 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 amount of water (c) sunny or shady place (d) days to see crystals
39. 39.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the same kind of bag”? (a) we change it (b) we measure it (c) we keep it the same
40. 40.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a balloon (b) baking soda (c) a funnel or spoon (d) a battery cell

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