Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 270 · 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.True or false: hold the plant in soil is a job of the roots. (a) True (b) False
2. 2.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is what we measure. (a) True (b) False
3. 3.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) pour it down the sink (c) keep it for a month (d) put it in your mouth
4. 4.🛟 How should the plastic bag be tied around the branch? (a) as tight as possible (b) with sharp wire (c) with a hot glue gun (d) gently, not too tight
5. 5.True or false: sugar water is an acid. (a) True (b) False
6. 6.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) the balloon is bigger (c) it turns to bread (d) it shrinks to nothing
7. 7.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) the kind of seeds (b) the same place (c) the number of seeds (d) wet or dry cotton
8. 8.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) sip each liquid (c) use only kitchen items (d) mix bathroom cleaners
9. 9.🧈 Which tool is used in many Indian homes to churn curd into butter? (a) a sieve (b) a rolling pin (c) a mathani (churner) (d) a pressure cooker
10. 10.🛟 Who should use the hot iron in the secret message experiment? (a) the youngest child (b) any child (c) whoever is fastest (d) only an adult
11. 11.True or false: a paper clip is not needed for the yeast balloon. (a) True (b) False
12. 12.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) False (b) True
13. 13.True or false: wet seeds by a window does not sprout. (a) True (b) False
14. 14.True or false: baking soda water turns turmeric reddish-brown. (a) True (b) False
15. 15.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) eat a few to check (b) feed them to pets (c) throw them at friends (d) never put seeds in mouth
16. 16.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap is hot (c) soap is an acid (d) soap water is a base
17. 17.🧺 Which of these is not needed for the muddy water filter? (a) a funnel (b) a clean glass (c) a mirror (d) sand and pebbles
18. 18.True or false: detergent water is neutral. (a) True (b) False
19. 19.🧺 Do we need white paper for the secret lemon message? (a) not needed (b) needed
20. 20.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
21. 21.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
22. 22.🫧 Which of these is an acid? (a) baking soda water (b) curd (c) salt water (d) detergent water
23. 23.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same funnel is the one thing we change. (a) False (b) True
24. 24.🫧 Which of these is neutral? (a) soap solution (b) lemon juice (c) detergent water (d) salt water
25. 25.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) carbon dioxide (b) oxygen (c) helium (d) hydrogen
26. 26.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) hot (b) clearer (c) salty (d) muddier
27. 27.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) neutral (c) a base
28. 28.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
29. 29.🧺 Do we need a balloon for sprouting seeds? (a) needed (b) not needed
30. 30.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it turns green (c) it stays yellow (d) reddish-brown
31. 31.True or false: a funnel is not needed for the muddy water filter. (a) False (b) True
32. 32.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the same jar is kept the same. (a) True (b) False
33. 33.🫗 Which of these is done by handpicking? (a) sugar from sugar water (b) husk from rice grain (c) bad grains from rice (d) tea leaves from tea
34. 34.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) a few hours (c) turmeric powder (d) sunlight
35. 35.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the same bottle”? (a) we keep it the same (b) we measure it (c) we change it
36. 36.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
37. 37.True or false: warm water is something yeast does not need. (a) False (b) True
38. 38.🔍 Which is the odd one out? (a) salt water (b) detergent water (c) soap solution (d) baking soda water
39. 39.True or false: sunlight is needed for the leafy bag test. (a) True (b) False
40. 40.True or false: lemon juice is an acid. (a) False (b) True

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