Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 140 · 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: seeds on wet cotton does not sprout. (a) True (b) False
2. 2.True or false: moong seeds is not needed for sprouting seeds. (a) False (b) True
3. 3.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
4. 4.🪴 Which part of a plant does this job: take in water from soil? (a) roots (b) flower (c) leaves (d) stem
5. 5.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a balloon (b) sugar (c) a tray for spills (d) vinegar
6. 6.True or false: a mirror is needed for the yeast balloon. (a) False (b) True
7. 7.🪴 Which part of a plant does this job: make seeds? (a) stem (b) leaves (c) roots (d) flower
8. 8.🧺 Which of these is not needed for the muddy water filter? (a) a battery cell (b) a clean glass (c) cotton or cloth (d) muddy water
9. 9.🍋 Which of these steps is a job for an adult? (a) dipping the cotton bud (b) writing the message (c) ironing the paper (d) reading the message
10. 10.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the amount poured (b) the filter material (c) the same glass (d) how clear the water is
11. 11.🧺 Which of these is needed for the secret lemon message? (a) a magnet (b) turmeric powder (c) a balloon (d) a small bowl
12. 12.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) turmeric powder (d) a small bottle
13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we keep it the same (c) we measure it
14. 14.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) orange juice (d) detergent water
15. 15.True or false: a small bowl is needed for sprouting seeds. (a) False (b) True
16. 16.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the water temperature (c) the amount of yeast
17. 17.🧺 Which of these is needed for the fizzy balloon? (a) sugar (b) a battery cell (c) a funnel or spoon (d) a mirror
18. 18.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
19. 19.🫧 Is soap solution an acid, a base or neutral? (a) neutral (b) an acid (c) a base
20. 20.🧺 Do we need turmeric powder for the leafy bag test? (a) needed (b) not needed
21. 21.🍋 Why does the lemon writing turn brown with heat? (a) paper turns lemony (b) the juice scorches first (c) heat adds colour (d) the iron is brown
22. 22.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a balloon (b) lemon juice (c) a small bowl (d) white paper
23. 23.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they become magnets (b) they freeze (c) they float apart (d) they react
24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we keep it the same (c) we change it
25. 25.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it grows faster (b) it turns blue (c) it flowers more (d) it wilts and droops
26. 26.True or false: a comb is needed for the turmeric test. (a) True (b) False
27. 27.🪴 Which of these is a job of the leaves? (a) take in water from soil (b) hold up the leaves (c) carry water upward (d) make food in sunlight
28. 28.🍋 Secret message: who does this step — cutting the lemon? (a) an adult does it (b) a child can do it
29. 29.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) rub your eyes (b) skip washing (c) wash your hands (d) lick your fingers
30. 30.🛟 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
31. 31.🫧 Is lemon juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
32. 32.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) a rainbow (b) dark brown words (c) almost nothing (d) blue words
33. 33.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
34. 34.🧺 Which of these is needed for sprouting seeds? (a) yeast (b) a battery cell (c) a balloon (d) cotton wool
35. 35.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same funnel”? (a) we measure it (b) we keep it the same (c) we change it
36. 36.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) melting butter (c) folding paper (d) freezing water
37. 37.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) throw them at friends (b) feed them to pets (c) never put seeds in mouth (d) eat a few to check
38. 38.🧺 Do we need cotton or cloth for the muddy water filter? (a) needed (b) not needed
39. 39.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the time we wait is the one thing we change. (a) True (b) False
40. 40.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we measure it (b) we keep it the same (c) we change it

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