Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 343 · 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: the adult irons for only one second. What happens? (a) it gets darker (b) writing turns green (c) the paper floats (d) writing stays faint
2. 2.🧺 Which of these is not needed for the muddy water filter? (a) sand and pebbles (b) a funnel (c) turmeric powder (d) a clean glass
3. 3.True or false: curd is an acid. (a) False (b) True
4. 4.⚖️ 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 measure it (b) we keep it the same (c) we change it
5. 5.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it grows much faster (c) it bursts at once (d) it turns yellow
6. 6.True or false: muddy water is needed for the muddy water filter. (a) False (b) True
7. 7.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a bowl (b) a jar with a tight lid (c) fresh cream (d) turmeric powder
8. 8.True or false: a battery cell is not needed for sprouting seeds. (a) True (b) False
9. 9.True or false: yeast is not needed for the leafy bag test. (a) True (b) False
10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a paper clip (c) dry yeast (d) a small bottle
11. 11.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the water temperature”? (a) we measure it (b) we change it (c) we keep it the same
12. 12.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) a tray for spills (c) a funnel or spoon (d) sugar
13. 13.📘 Leaves have tiny holes that let out water vapour. What are they called? (a) stomata (b) roots (c) petals (d) veins
14. 14.🪴 Which of these is a job of the roots? (a) carry water upward (b) hold up the leaves (c) hold the plant in soil (d) make seeds
15. 15.True or false: soap solution keeps turmeric yellow. (a) True (b) False
16. 16.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is kept the same. (a) True (b) False
17. 17.🧺 Do we need a comb for the fizzy balloon? (a) needed (b) not needed
18. 18.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a mirror (c) a shallow dish (d) a piece of string
19. 19.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same bowls”? (a) we measure it (b) we change it (c) we keep it the same
20. 20.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a balloon (b) cotton wool (c) a small bowl (d) a few days
21. 21.⚖️ 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 change it (b) we keep it the same (c) we measure it
22. 22.🌱 Which of these sprouts in a few days? (a) boiled seeds (b) wet seeds in the dark (c) seeds on dry cotton (d) seeds in the freezer
23. 23.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) how many seeds sprout (b) wet or dry cotton (c) the kind of seeds (d) the number of seeds
24. 24.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) sugar (c) turmeric powder (d) warm water
25. 25.🍋 Secret message: who does this step — plugging in the iron? (a) an adult does it (b) a child can do it
26. 26.🧺 Which of these is not needed for making butter? (a) a jar with a tight lid (b) fresh cream (c) turmeric powder (d) cold water to rinse
27. 27.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it wilts and droops (b) it flowers more (c) it grows faster (d) it turns blue
28. 28.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) how dark the writing is (b) the kind of juice (c) the same cotton bud
29. 29.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
30. 30.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the same dish (b) days to see crystals (c) sunny or shady place (d) the kind of salt
31. 31.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the salt (b) the water (c) nothing (d) the mud
32. 32.🍋 Which of these steps is a job a child can do? (a) ironing the paper (b) putting the iron away (c) plugging in the iron (d) letting the paper dry
33. 33.🫧 Is curd an acid, a base or neutral? (a) a base (b) neutral (c) an acid
34. 34.🧺 Do we need a mirror for the muddy water filter? (a) not needed (b) needed
35. 35.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the amount of vinegar is what we measure. (a) True (b) False
36. 36.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) white at once (c) reddish (d) bright blue
37. 37.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) it turns to sugar (b) yes, all of it (c) it turns to sand (d) no, salt passes through
38. 38.🫧 Is detergent water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
39. 39.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the number of drops (b) the light we look in (c) the colour we see (d) the liquid we test
40. 40.🌱 Where does a sprouting seed get its first food from? (a) the air (b) the sunlight only (c) food stored in the seed (d) the cotton wool

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