Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 249 · 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 — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is kept the same. (a) True (b) False
2. 2.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
3. 3.🛟 What should you do after handling muddy water? (a) lick your fingers (b) wash hands afterwards (c) wipe hands on face (d) nothing is needed
4. 4.🛟 The water for the yeast should be ___. (a) ice cold (b) warm, not hot (c) boiling hot (d) very salty
5. 5.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns green (c) it stays yellow (d) it turns blue
6. 6.🍋 Secret message: who does this step — ironing the paper? (a) a child can do it (b) an adult does it
7. 7.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a tray for spills (b) a battery cell (c) vinegar (d) a balloon
8. 8.🛟 Why should you never drink water just because it looks clear? (a) clear water is hot (b) germs are invisible (c) clear water is sweet (d) clear water is salty
9. 9.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) sun or shade (b) the kind of plant (c) the size of the plant (d) the same kind of bag
10. 10.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) water (c) a magnet (d) lemon juice
11. 11.🛟 What should you do if vinegar splashes in your eye? (a) rinse with clean water (b) add baking soda (c) rub it hard (d) ignore it
12. 12.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting butter (c) milk turning to curd (d) dissolving salt
13. 13.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
14. 14.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same cotton bud”? (a) we measure it (b) we change it (c) we keep it the same
15. 15.⚖️ 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
16. 16.True or false: gravel from fine sand is done by sieving. (a) True (b) False
17. 17.True or false: writing the message is a job for an adult. (a) False (b) True
18. 18.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
19. 19.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) a potted plant (c) a rubber band (d) yeast
20. 20.📘 What is yeast? (a) a kind of stone (b) a kind of salt (c) a kind of sugar (d) a tiny living fungus
21. 21.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) size of the balloon (b) spoons of baking soda (c) the kind of balloon
22. 22.🧺 Which of these is needed for making butter? (a) a timer (b) yeast (c) turmeric powder (d) a mirror
23. 23.🧺 Which of these is needed for the leafy bag test? (a) a mirror (b) a magnet (c) a clear plastic bag (d) yeast
24. 24.True or false: a cotton bud is not needed for the secret lemon message. (a) True (b) False
25. 25.🫧 Which of these is neutral? (a) soap solution (b) vinegar (c) baking soda water (d) salt water
26. 26.True or false: wet seeds in the dark does not sprout. (a) False (b) True
27. 27.True or false: sugar water is a base. (a) False (b) True
28. 28.True or false: a funnel is not needed for the muddy water filter. (a) False (b) True
29. 29.⚖️ 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 keep it the same (c) we measure it
30. 30.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) leaves pass through (b) both stay behind (c) tea stays behind (d) leaves stay behind
31. 31.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) the same bottle (b) size of the balloon (c) the amount of vinegar (d) spoons of baking soda
32. 32.True or false: give out water vapour is a job of the flower. (a) True (b) False
33. 33.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
34. 34.🛟 Why must a plastic bag never go over anyone’s head? (a) it changes colour (b) it is too big (c) it gets wet (d) it can block breathing
35. 35.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same place”? (a) we change it (b) we measure it (c) we keep it the same
36. 36.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) few or no crystals (d) it fizzes
37. 37.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) pour it down the sink (c) keep it for a month (d) throw it at a wall
38. 38.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) freezing water (c) baking a cake (d) folding paper
39. 39.🫗 How do we separate husk from rice grain? (a) filtering (b) handpicking (c) winnowing (d) evaporating
40. 40.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) safe from small children (c) in a busy doorway (d) on the edge of a table

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