Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 979 · 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.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) it turns to sand (b) yes, all of it (c) it turns to sugar (d) no, salt passes through
2. 2.True or false: sugar is needed for the yeast balloon. (a) False (b) True
3. 3.True or false: warm water is needed for growing salt crystals. (a) False (b) True
4. 4.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the iron setting is kept the same. (a) False (b) True
5. 5.🛟 How should the plastic bag be tied around the branch? (a) with a hot glue gun (b) gently, not too tight (c) with sharp wire (d) as tight as possible
6. 6.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
7. 7.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) rub your eyes (b) lick your fingers (c) wash your hands (d) skip washing
8. 8.🧺 Which of these is needed for the secret lemon message? (a) a mirror (b) a battery cell (c) a cotton bud (d) yeast
9. 9.True or false: vinegar is not needed for the fizzy balloon. (a) True (b) False
10. 10.True or false: an empty bottle is needed for the fizzy balloon. (a) True (b) False
11. 11.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
12. 12.📘 What do we call plants giving out water vapour from their leaves? (a) digestion (b) reflection (c) transpiration (d) germination
13. 13.True or false: a small bowl is needed for the secret lemon message. (a) False (b) True
14. 14.🧺 Do we need a magnet for the fizzy balloon? (a) not needed (b) needed
15. 15.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True
16. 16.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) sugar (c) warm water (d) a battery cell
17. 17.🧂 Which of these does not dissolve in water? (a) glucose powder (b) table salt (c) sugar (d) cooking oil
18. 18.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) never put seeds in mouth (b) throw them at friends (c) feed them to pets (d) eat a few to check
19. 19.True or false: time is something yeast does not need. (a) True (b) False
20. 20.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a tray for spills (b) a seed (c) an empty bottle (d) vinegar
21. 21.🧺 Do we need sunlight for the leafy bag test? (a) needed (b) not needed
22. 22.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a funnel or spoon (b) a battery cell (c) a tray for spills (d) a balloon
23. 23.⚖️ Fair test — do seeds need water to sprout? True or false: the same bowls is kept the same. (a) False (b) True
24. 24.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “how dark the writing is”? (a) we change it (b) we keep it the same (c) we measure it
25. 25.🧺 Do we need a mirror for the muddy water filter? (a) not needed (b) needed
26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is the one thing we change. (a) True (b) False
27. 27.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a jar with a tight lid (b) turmeric powder (c) fresh cream (d) a timer
28. 28.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “how hard we shake”? (a) we measure it (b) we change it (c) we keep it the same
29. 29.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a magnet (b) a few days (c) a small bowl (d) cotton wool
30. 30.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
31. 31.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a funnel (b) sand and pebbles (c) cotton or cloth (d) a magnet
32. 32.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a magnet (c) a mirror (d) a spoon
33. 33.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) nothing (b) the salt (c) the water (d) the mud
34. 34.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it grows bigger (b) it turns blue (c) it shrinks (d) there is no change
35. 35.🛟 Why should you never drink water just because it looks clear? (a) clear water is salty (b) clear water is sweet (c) germs are invisible (d) clear water is hot
36. 36.🍋 Secret message: who does this step — letting the paper dry? (a) a child can do it (b) an adult does it
37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we change it (c) we keep it the same
38. 38.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) dry yeast (c) a comb (d) warm water
39. 39.🫧 Is baking soda water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
40. 40.True or false: sunlight is something yeast does not need. (a) True (b) False

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