Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 217 · 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 of these is a change that can be undone? (a) milk turning to curd (b) cooking an egg (c) dissolving salt (d) baking a cake
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.🍋 Which of these steps is a job a child can do? (a) cutting the lemon (b) ironing the paper (c) putting the iron away (d) reading the message
4. 4.🔍 Which is the odd one out? (a) folding paper (b) melting ice (c) dissolving salt (d) rusting iron
5. 5.True or false: bad grains from rice is done by handpicking. (a) True (b) False
6. 6.📘 Leaves have tiny holes that let out water vapour. What are they called? (a) veins (b) roots (c) petals (d) stomata
7. 7.🔍 Which is the odd one out? (a) sawdust (b) cooking oil (c) table salt (d) sand
8. 8.🍋 Secret message: who does this step — writing the message? (a) an adult does it (b) a child can do it
9. 9.🧺 Which of these is needed for sprouting seeds? (a) yeast (b) a magnet (c) a small bowl (d) a balloon
10. 10.True or false: a magnet is not needed for the muddy water filter. (a) False (b) True
11. 11.📘 What do we call a seed starting to grow? (a) pollination (b) evaporation (c) condensation (d) germination
12. 12.True or false: baking soda water is neutral. (a) True (b) False
13. 13.🫧 Is soap solution an acid, a base or neutral? (a) a base (b) neutral (c) an acid
14. 14.⚖️ 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
15. 15.🌱 Where does a sprouting seed get its first food from? (a) the air (b) food stored in the seed (c) the cotton wool (d) the sunlight only
16. 16.⚖️ 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
17. 17.True or false: a comb is needed for the yeast balloon. (a) False (b) True
18. 18.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False
19. 19.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we measure it (b) we keep it the same (c) we change it
20. 20.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the kind of plant is the one thing we change. (a) False (b) True
21. 21.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) rusting iron (c) baking a cake (d) melting ice
22. 22.True or false: a clear plastic bag is needed for the leafy bag test. (a) True (b) False
23. 23.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the size of the plant”? (a) we keep it the same (b) we measure it (c) we change it
24. 24.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) no, never (b) yes, they sprout (c) they melt (d) they turn to stones
25. 25.True or false: lemon juice is not needed for the secret lemon message. (a) False (b) True
26. 26.🫧 Is sugar water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
27. 27.🌱 Is water needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
28. 28.True or false: warm water is something yeast does not need. (a) False (b) True
29. 29.🫗 How do we separate chaff from wheat grain? (a) evaporating (b) winnowing (c) sieving (d) filtering
30. 30.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the same bottle (b) the kind of balloon (c) spoons of baking soda (d) size of the balloon
31. 31.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny stars (c) tiny cubes (d) tiny triangles
32. 32.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the same jar”? (a) we measure it (b) we keep it the same (c) we change it
33. 33.🫧 Is baking soda water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
34. 34.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is the one thing we change? (a) the amount of yeast (b) the amount of sugar (c) the water temperature (d) size of the balloon
35. 35.🫧 Which of these is a base? (a) salt water (b) tamarind water (c) curd (d) baking soda water
36. 36.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the kind of plant”? (a) we change it (b) we measure it (c) we keep it the same
37. 37.True or false: salt water keeps turmeric yellow. (a) True (b) False
38. 38.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) warm water (c) sugar (d) a magnet
39. 39.🫧 Which of these is neutral? (a) curd (b) detergent water (c) orange juice (d) salt water
40. 40.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) the same funnel (b) how clear the water is (c) the filter material

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