Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 618 · 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.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny triangles (c) tiny cubes (d) tiny stars
2. 2.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a battery cell (b) a bowl (c) a jar with a tight lid (d) a timer
3. 3.🔮 Predict: you stop shaking after only one minute. What do you have? (a) ghee (b) butter lumps (c) still runny cream (d) cheese
4. 4.🧺 Which of these is needed for the leafy bag test? (a) a mirror (b) sunlight (c) a battery cell (d) a magnet
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a shallow dish (d) turmeric powder
6. 6.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) tiny insects (b) salt crystals (c) tiny water drops (d) nothing at all
7. 7.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) cold water to rinse (b) a balloon (c) a bowl (d) fresh cream
8. 8.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
9. 9.🧂 Which of these does not dissolve in water? (a) glucose powder (b) sawdust (c) sugar (d) baking soda
10. 10.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “amount of water drops”? (a) we keep it the same (b) we change it (c) we measure it
11. 11.🍋 Secret message: who does this step — ironing the paper? (a) a child can do it (b) an adult does it
12. 12.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) water (b) a balloon (c) a few days (d) cotton wool
13. 13.🧺 Do we need moong seeds for sprouting seeds? (a) needed (b) not needed
14. 14.🌱 Which of these does not sprout? (a) wet seeds in the dark (b) seeds on dry cotton (c) seeds on wet cotton (d) wet seeds by a window
15. 15.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we measure it (b) we change it (c) we keep it the same
16. 16.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it turns green (c) reddish-brown (d) it stays yellow
17. 17.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) how clear the water is (b) the filter material (c) the same funnel
18. 18.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) the same funnel (b) the same glass (c) how clear the water is (d) the amount poured
19. 19.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) turmeric powder (c) warm water (d) a balloon
20. 20.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
21. 21.🫧 Is orange juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
22. 22.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
23. 23.True or false: baking soda dissolves in water. (a) False (b) True
24. 24.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) oxygen (b) helium (c) carbon dioxide (d) hydrogen
25. 25.🌱 Which of these sprouts in a few days? (a) wet seeds in the dark (b) seeds on dry cotton (c) boiled seeds (d) seeds in the freezer
26. 26.🛟 Why must a plastic bag never go over anyone’s head? (a) it gets wet (b) it changes colour (c) it can block breathing (d) it is too big
27. 27.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of yeast”? (a) we change it (b) we measure it (c) we keep it the same
28. 28.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) orange juice (d) soap solution
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) sunny or shady place (c) the amount of water (d) the amount of salt
30. 30.🧺 Which of these is not needed for the secret lemon message? (a) a cotton bud (b) a balloon (c) a small bowl (d) lemon juice
31. 31.🪴 Which of these is a job of the leaves? (a) make food in sunlight (b) make seeds (c) hold up the leaves (d) hold the plant in soil
32. 32.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) put it in your mouth (c) keep it for a month (d) pour it down the sink
33. 33.🧺 Do we need vinegar for the fizzy balloon? (a) needed (b) not needed
34. 34.🍋 Why does the lemon writing turn brown with heat? (a) paper turns lemony (b) heat adds colour (c) the juice scorches first (d) the iron is brown
35. 35.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
36. 36.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows very little (c) it bursts at once (d) it grows much faster
37. 37.🫗 Why does filtered muddy water look clearer? (a) the water evaporates (b) the filter adds soap (c) the filter traps mud (d) the mud dissolves
38. 38.True or false: dipping the cotton bud is a job for an adult. (a) False (b) True
39. 39.🧺 Do we need turmeric powder for the muddy water filter? (a) needed (b) not needed
40. 40.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) an empty bottle (c) a funnel or spoon (d) a battery cell

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