Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 153 · 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.🔍 Which is the odd one out? (a) melting butter (b) cooking an egg (c) dissolving salt (d) freezing water
2. 2.True or false: a mirror is needed for the turmeric test. (a) False (b) True
3. 3.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
4. 4.🛟 Who should use the hot iron in the secret message experiment? (a) the youngest child (b) whoever is fastest (c) any child (d) only an adult
5. 5.🛟 How should the plastic bag be tied around the branch? (a) with a hot glue gun (b) gently, not too tight (c) as tight as possible (d) with sharp wire
6. 6.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) soap solution (d) vinegar
7. 7.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
8. 8.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
9. 9.🧈 Which of these is a change that can be undone? (a) rusting iron (b) cooking an egg (c) melting ice (d) browning lemon ink
10. 10.🛟 Which safety rule fits the fizzy balloon experiment? (a) seal it in a glass jar (b) keep it away from eyes (c) put it in your mouth (d) shake it near your face
11. 11.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the filter material”? (a) we measure it (b) we keep it the same (c) we change it
12. 12.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
13. 13.True or false: tamarind water turns turmeric reddish-brown. (a) True (b) False
14. 14.🧺 Do we need a mirror for making butter? (a) not needed (b) needed
15. 15.True or false: a small bowl is needed for the secret lemon message. (a) False (b) True
16. 16.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is what we measure. (a) False (b) True
17. 17.🫧 Is curd an acid, a base or neutral? (a) neutral (b) a base (c) an acid
18. 18.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
19. 19.True or false: a clear plastic bag is needed for the leafy bag test. (a) False (b) True
20. 20.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is the one thing we change. (a) True (b) False
21. 21.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) never put seeds in mouth (b) feed them to pets (c) throw them at friends (d) eat a few to check
22. 22.🎈 Why does the balloon blow up? (a) vinegar is hot (b) gas is made inside (c) the bottle shrinks (d) outside air gets in
23. 23.True or false: letting the paper dry is a job a child can do. (a) True (b) False
24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the liquid we test (b) the turmeric paper (c) the number of drops (d) the light we look in
25. 25.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) moong seeds (b) cotton wool (c) a mirror (d) water
26. 26.True or false: plain water is neutral. (a) False (b) True
27. 27.True or false: time is something yeast does not need. (a) True (b) False
28. 28.🧺 Do we need turmeric powder for the secret lemon message? (a) needed (b) not needed
29. 29.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) how hard we shake (b) the cream temperature (c) time to make butter
30. 30.True or false: orange juice is a base. (a) True (b) False
31. 31.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of sugar”? (a) we measure it (b) we change it (c) we keep it the same
32. 32.🧺 Do we need an empty bottle for the fizzy balloon? (a) not needed (b) needed
33. 33.⚖️ 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 water (b) the amount of salt (c) sunny or shady place (d) the kind of salt
34. 34.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the amount of vinegar is kept the same. (a) False (b) True
35. 35.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a balloon (c) a mirror (d) a paper clip
36. 36.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: how clear the water is is kept the same. (a) True (b) False
37. 37.🛟 Why is a plastic jar a good choice for shaking? (a) it will not break (b) it is magnetic (c) it is heavier (d) it is hotter
38. 38.🌱 Seeds need water, air and ___ to sprout. (a) sugar (b) warmth (c) salt (d) soil
39. 39.🧺 Do we need muddy water for the muddy water filter? (a) not needed (b) needed
40. 40.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the same cotton bud (b) the iron setting (c) the ironing time (d) how dark the writing is

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