Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 325 · 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.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) spoons of baking soda (b) size of the balloon (c) the amount of vinegar
2. 2.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a clean glass (b) cotton or cloth (c) a mirror (d) sand and pebbles
3. 3.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) no, salt passes through (b) yes, all of it (c) it turns to sand (d) it turns to sugar
4. 4.True or false: sand dissolves in water. (a) False (b) True
5. 5.🎈 Why does the balloon blow up? (a) vinegar is hot (b) outside air gets in (c) gas is made inside (d) the bottle shrinks
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a piece of string (d) a balloon
7. 7.🧺 Which of these is needed for the fizzy balloon? (a) a seed (b) a mirror (c) an empty bottle (d) a magnet
8. 8.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “sun or shade”? (a) we keep it the same (b) we change it (c) we measure it
9. 9.True or false: baking soda is not needed for the fizzy balloon. (a) True (b) False
10. 10.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the amount poured”? (a) we measure it (b) we change it (c) we keep it the same
11. 11.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we keep it the same (b) we change it (c) we measure it
12. 12.📘 Leaves have tiny holes that let out water vapour. What are they called? (a) roots (b) veins (c) petals (d) stomata
13. 13.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your best clothes (c) an old shirt or apron (d) your school uniform
14. 14.🧺 Which of these is needed for the muddy water filter? (a) a battery cell (b) yeast (c) a clean glass (d) a mirror
15. 15.True or false: warm water is needed for the yeast balloon. (a) False (b) True
16. 16.🧈 Why does shaking cream make butter? (a) the lid is warm (b) fat bits stick together (c) shaking adds salt (d) the jar adds butter
17. 17.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a clean glass (b) sand and pebbles (c) a battery cell (d) cotton or cloth
18. 18.🔍 Which is the odd one out? (a) browning lemon ink (b) cooking an egg (c) melting ice (d) milk turning to curd
19. 19.True or false: baking a cake is a change that can be undone. (a) False (b) True
20. 20.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the kind of juice”? (a) we measure it (b) we keep it the same (c) we change it
21. 21.⚖️ 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) sunny or shady place (b) days to see crystals (c) the same dish (d) the amount of water
22. 22.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) hydrogen (b) helium (c) oxygen (d) carbon dioxide
23. 23.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) a base (c) an acid
24. 24.🔍 Which is the odd one out? (a) plugging in the iron (b) putting the iron away (c) reading the message (d) cutting the lemon
25. 25.🛟 What should you do after touching soil or seeds? (a) wash your hands (b) rub your eyes (c) lick your fingers (d) skip washing
26. 26.True or false: a battery cell is not needed for the secret lemon message. (a) False (b) True
27. 27.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) the same jar (b) time to make butter (c) how hard we shake (d) the cream temperature
28. 28.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) vinegar (c) a funnel or spoon (d) a comb
29. 29.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
30. 30.True or false: writing the message is a job a child can do. (a) True (b) False
31. 31.🍋 Why can’t you see the lemon writing once it dries? (a) the paper ate it (b) it turned into air (c) dry juice is see-through (d) the ink is magnetic
32. 32.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) it fizzes (c) crystals grow faster (d) few or no crystals
33. 33.🔍 Which is the odd one out? (a) cutting the lemon (b) ironing the paper (c) dipping the cotton bud (d) plugging in the iron
34. 34.🛟 Why is a plastic jar a good choice for shaking? (a) it is heavier (b) it will not break (c) it is magnetic (d) it is hotter
35. 35.⚖️ 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 keep it the same (b) we change it (c) we measure it
36. 36.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) sugar water (c) baking soda water (d) soap solution
37. 37.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) vinegar (d) detergent water
38. 38.True or false: seeds on wet cotton does not sprout. (a) False (b) True
39. 39.True or false: lemon juice is neutral. (a) False (b) True
40. 40.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) an adult with an iron (b) white paper (c) a cotton bud (d) a balloon

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