Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 66 · 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.🛟 Why should you never drink water just because it looks clear? (a) clear water is sweet (b) germs are invisible (c) clear water is salty (d) clear water is hot
2. 2.🔍 Which is the odd one out? (a) baking soda (b) food colour (c) sugar (d) chalk powder
3. 3.🛟 Why must the jar lid be screwed on tightly? (a) so it gets hot (b) so cream does not spill (c) so air gets out (d) so it turns yellow
4. 4.🛟 What should you do after handling muddy water? (a) nothing is needed (b) lick your fingers (c) wash hands afterwards (d) wipe hands on face
5. 5.True or false: lemon juice is needed for the secret lemon message. (a) True (b) False
6. 6.🧺 Which of these is needed for the secret lemon message? (a) yeast (b) a battery cell (c) a cotton bud (d) a mirror
7. 7.🧺 Which of these is needed for the fizzy balloon? (a) a mirror (b) sugar (c) a comb (d) vinegar
8. 8.🛟 How should the plastic bag be tied around the branch? (a) with sharp wire (b) as tight as possible (c) gently, not too tight (d) with a hot glue gun
9. 9.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) carbon dioxide (b) hydrogen (c) helium (d) oxygen
10. 10.True or false: a clear plastic bag is not needed for the leafy bag test. (a) False (b) True
11. 11.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) put it in your mouth (c) pour it down the sink (d) throw it at a wall
12. 12.🔍 Which is the odd one out? (a) baking soda water (b) vinegar (c) salt water (d) tamarind water
13. 13.True or false: sugar is needed for the yeast balloon. (a) True (b) False
14. 14.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) sunlight (c) a few hours (d) yeast
15. 15.🔍 Which is the odd one out? (a) vinegar (b) a magnet (c) sunlight (d) warm water
16. 16.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) lemon juice (b) a small bowl (c) a balloon (d) an adult with an iron
17. 17.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the same bottle”? (a) we measure it (b) we keep it the same (c) we change it
18. 18.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a few days (b) moong seeds (c) water (d) a magnet
19. 19.🔍 Which is the odd one out? (a) cutting the lemon (b) ironing the paper (c) dipping the cotton bud (d) putting the iron away
20. 20.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) reddish-brown (c) green (d) it stays white
21. 21.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) feed them to pets (b) eat a few to check (c) throw them at friends (d) never put seeds in mouth
22. 22.🛟 What should you do if vinegar splashes in your eye? (a) rinse with clean water (b) rub it hard (c) ignore it (d) add baking soda
23. 23.📘 Is the fizzing a sign that a new substance is made? (a) no, nothing changes (b) yes, a new gas forms (c) it is only melting (d) it is only dissolving
24. 24.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it dissolves (b) it turns to sand (c) it floats on top (d) it sinks to the bottom
25. 25.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
26. 26.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it flowers more (b) it grows faster (c) it turns blue (d) it wilts and droops
27. 27.🔮 Predict: seeds on wet cotton are kept in the freezer. What happens? (a) they glow (b) they grow fruit (c) they sprout faster (d) they do not sprout
28. 28.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False
29. 29.True or false: time is something yeast needs. (a) False (b) True
30. 30.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
31. 31.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) yeast (c) warm water (d) a spoon
32. 32.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) the same jar (b) how hard we shake (c) time to make butter (d) the amount of cream
33. 33.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
34. 34.🍋 Which of these steps is a job a child can do? (a) ironing the paper (b) dipping the cotton bud (c) cutting the lemon (d) plugging in the iron
35. 35.📘 What do we call plants giving out water vapour from their leaves? (a) reflection (b) germination (c) transpiration (d) digestion
36. 36.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) sugar (b) a tray for spills (c) baking soda (d) a balloon
37. 37.True or false: a balloon is needed for growing salt crystals. (a) False (b) True
38. 38.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a battery cell (b) a clear plastic bag (c) sunlight (d) a rubber band
39. 39.🧺 Which of these is not needed for the yeast balloon? (a) a comb (b) dry yeast (c) a balloon (d) sugar
40. 40.True or false: mud from water is done by sieving. (a) True (b) False

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