Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 705 · 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 is yeast? (a) a kind of salt (b) a tiny living fungus (c) a kind of stone (d) a kind of sugar
2. 2.🍞 Why does yeast work slowly in cold water? (a) cold slows yeast down (b) cold kills sugar (c) cold water is heavy (d) cold makes it pink
3. 3.🌱 Is soil needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
4. 4.🌱 Will these sprout: seeds on wet cotton? (a) sprouts (b) does not sprout
5. 5.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a timer (b) a jar with a tight lid (c) fresh cream (d) a magnet
6. 6.True or false: a potted plant is not needed for the leafy bag test. (a) True (b) False
7. 7.🔮 Predict: you stop shaking after only one minute. What do you have? (a) cheese (b) ghee (c) butter lumps (d) still runny cream
8. 8.True or false: plugging in the iron is a job a child can do. (a) True (b) False
9. 9.True or false: cooking oil does not dissolve in water. (a) True (b) False
10. 10.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a mirror (b) a clean glass (c) cotton or cloth (d) muddy water
11. 11.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: how clear the water is is the one thing we change. (a) False (b) True
12. 12.True or false: vinegar is a base. (a) False (b) True
13. 13.🪴 Which part of a plant does this job: hold up the leaves? (a) leaves (b) flower (c) roots (d) stem
14. 14.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
15. 15.🌱 Is sugar needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
16. 16.🛟 What should you do after touching soil or seeds? (a) rub your eyes (b) skip washing (c) lick your fingers (d) wash your hands
17. 17.🛟 Who should use the hot iron in the secret message experiment? (a) any child (b) whoever is fastest (c) the youngest child (d) only an adult
18. 18.🍋 Secret message: who does this step — ironing the paper? (a) a child can do it (b) an adult does it
19. 19.🪴 Where did the water inside the bag come from? (a) the rubber band (b) the rain (c) the plastic (d) the leaves
20. 20.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) tamarind water (c) baking soda water (d) plain water
21. 21.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) the same bottle (b) spoons of baking soda (c) size of the balloon
22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) a balloon (d) turmeric powder
23. 23.🧺 Which of these is not needed for the yeast balloon? (a) a mirror (b) dry yeast (c) sugar (d) a balloon
24. 24.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) detergent water (c) lemon juice (d) salt water
25. 25.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
26. 26.🫧 What do you see when baking soda meets vinegar? (a) nothing at all (b) it glows in the dark (c) it turns to ice (d) lots of fizzy bubbles
27. 27.🔍 What do you see after shaking cream in a jar for a long time? (a) lumps of butter (b) sugar crystals (c) bubbles of gas (d) clear water only
28. 28.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the amount of cream is what we measure. (a) False (b) True
29. 29.🪴 Which of these is a job of the roots? (a) make seeds (b) give out water vapour (c) take in water from soil (d) make food in sunlight
30. 30.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) plain water (d) baking soda water
31. 31.🛟 Why must a plastic bag never go over anyone’s head? (a) it changes colour (b) it can block breathing (c) it is too big (d) it gets wet
32. 32.True or false: white paper strips is needed for the turmeric test. (a) True (b) False
33. 33.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is kept the same? (a) sun or shade (b) the size of the plant (c) amount of water drops
34. 34.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a paper clip (c) sugar (d) dry yeast
35. 35.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) the same kind of bag (b) amount of water drops (c) sun or shade (d) the size of the plant
36. 36.🧈 Why does shaking cream make butter? (a) the jar adds butter (b) shaking adds salt (c) fat bits stick together (d) the lid is warm
37. 37.🧺 Which of these is not needed for the secret lemon message? (a) lemon juice (b) an adult with an iron (c) a magnet (d) a small bowl
38. 38.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is what we measure. (a) True (b) False
39. 39.True or false: lemon juice turns turmeric reddish-brown. (a) True (b) False
40. 40.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it turns blue (b) it flowers more (c) it grows faster (d) it wilts and droops

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