Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 854 · 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 do crystals appear as the dish dries? (a) the dish melts (b) salt eats water (c) water evaporates (d) salt grows roots
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we measure it (b) we change it (c) we keep it the same
3. 3.⚖️ Fair test — do seeds need water to sprout? What do we do with “how many seeds sprout”? (a) we change it (b) we measure it (c) we keep it the same
4. 4.🔍 Which is the odd one out? (a) plain water (b) baking soda water (c) detergent water (d) soap solution
5. 5.🍞 Which of these is something yeast needs? (a) sugar (b) sunlight (c) vinegar (d) a magnet
6. 6.🧺 Do we need a mirror for the secret lemon message? (a) needed (b) not needed
7. 7.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
8. 8.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
9. 9.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the same muddy water (b) the filter material (c) the amount poured (d) the same glass
10. 10.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
11. 11.🔍 Which is the odd one out? (a) sugar water (b) soap solution (c) lemon juice (d) vinegar
12. 12.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) folding paper (c) dissolving salt (d) baking a cake
13. 13.🫗 Why does filtered muddy water look clearer? (a) the filter adds soap (b) the mud dissolves (c) the water evaporates (d) the filter traps mud
14. 14.True or false: detergent water is a base. (a) True (b) False
15. 15.🧺 Do we need a few hours for the leafy bag test? (a) needed (b) not needed
16. 16.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed
17. 17.🔍 Which is the odd one out? (a) a magnet (b) vinegar (c) warm water (d) sunlight
18. 18.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) dry yeast (c) a magnet (d) a balloon
19. 19.🛟 How should the plastic bag be tied around the branch? (a) with a hot glue gun (b) with sharp wire (c) as tight as possible (d) gently, not too tight
20. 20.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a battery cell (c) a balloon (d) warm water
21. 21.🔮 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
22. 22.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
23. 23.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) lick your fingers (b) skip washing (c) rub your eyes (d) wash your hands
24. 24.🔍 Which is the odd one out? (a) dissolving salt (b) browning lemon ink (c) milk turning to curd (d) rusting iron
25. 25.🔍 Which is the odd one out? (a) soap solution (b) tamarind water (c) baking soda water (d) detergent water
26. 26.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
27. 27.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) there is no change (b) it turns blue (c) it grows bigger (d) it shrinks
28. 28.📘 What do we call something that changes colour to show an acid or a base? (a) an indicator (b) a magnet (c) a pulley (d) a prism
29. 29.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the ironing time”? (a) we change it (b) we keep it the same (c) we measure it
30. 30.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a battery cell (b) a cotton bud (c) white paper (d) lemon juice
31. 31.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “how hard we shake”? (a) we change it (b) we keep it the same (c) we measure it
32. 32.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) the same bowls (b) how many seeds sprout (c) the kind of seeds (d) wet or dry cotton
33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the turmeric paper (c) the liquid we test
34. 34.🧺 Do we need a bowl for making butter? (a) needed (b) not needed
35. 35.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) sugar crystals form (c) it turns to butter (d) it turns to oil
36. 36.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) a clean glass (c) turmeric powder (d) a funnel
37. 37.True or false: sugar water is neutral. (a) False (b) True
38. 38.⚖️ Fair test — do seeds need water to sprout? What do we do with “wet or dry cotton”? (a) we measure it (b) we change it (c) we keep it the same
39. 39.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is what we measure. (a) False (b) True
40. 40.🌱 Where does a sprouting seed get its first food from? (a) the air (b) the sunlight only (c) the cotton wool (d) food stored in the seed

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