Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 200 · 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 not needed for making butter? (a) a jar with a tight lid (b) cold water to rinse (c) a timer (d) a magnet
2. 2.🧺 Do we need moong seeds for sprouting seeds? (a) needed (b) not needed
3. 3.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) a small bottle (c) sugar (d) dry yeast
4. 4.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the amount poured”? (a) we change it (b) we measure it (c) we keep it the same
5. 5.True or false: putting the iron away is a job a child can do. (a) True (b) False
6. 6.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) cotton or cloth (b) sand and pebbles (c) a clean glass (d) turmeric powder
7. 7.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) fresh cream (b) a bowl (c) yeast (d) a timer
8. 8.🔍 Which is the odd one out? (a) melting ice (b) dissolving salt (c) baking a cake (d) freezing water
9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is what we measure. (a) True (b) False
10. 10.True or false: yeast is needed for the leafy bag test. (a) False (b) True
11. 11.🧺 Do we need a funnel or spoon for the fizzy balloon? (a) not needed (b) needed
12. 12.🍋 Secret message: who does this step — putting the iron away? (a) a child can do it (b) an adult does it
13. 13.🧺 Which of these is needed for the fizzy balloon? (a) a battery cell (b) a seed (c) a tray for spills (d) a magnet
14. 14.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “time to make butter”? (a) we measure it (b) we keep it the same (c) we change it
15. 15.🧺 Which of these is needed for the leafy bag test? (a) a battery cell (b) yeast (c) a clear plastic bag (d) a magnet
16. 16.🌱 Which of these sprouts in a few days? (a) seeds on dry cotton (b) seeds on wet cotton (c) seeds in the freezer (d) boiled seeds
17. 17.🧺 Which of these is not needed for the fizzy balloon? (a) vinegar (b) a balloon (c) a funnel or spoon (d) a magnet
18. 18.True or false: a spoon is not needed for growing salt crystals. (a) True (b) False
19. 19.True or false: a comb is needed for the fizzy balloon. (a) True (b) False
20. 20.True or false: hold the plant in soil is a job of the roots. (a) True (b) False
21. 21.🧺 Which of these is needed for the secret lemon message? (a) a magnet (b) a cotton bud (c) a balloon (d) a mirror
22. 22.🌱 Which of these does not sprout? (a) seeds on wet cotton (b) wet seeds by a window (c) wet seeds in the dark (d) boiled seeds
23. 23.True or false: salt water keeps turmeric yellow. (a) True (b) False
24. 24.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) put it in your mouth (c) throw it at a wall (d) pour it down the sink
25. 25.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) carbon dioxide gas (c) air from outside (d) steam
26. 26.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the ironing time”? (a) we keep it the same (b) we measure it (c) we change it
27. 27.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) liquid crystals (d) bigger crystals
28. 28.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) the cream temperature (b) time to make butter (c) how hard we shake
29. 29.🧺 Do we need a balloon for sprouting seeds? (a) not needed (b) needed
30. 30.🎈 Why does the balloon blow up? (a) gas is made inside (b) the bottle shrinks (c) vinegar is hot (d) outside air gets in
31. 31.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) oxygen (b) helium (c) hydrogen (d) carbon dioxide
32. 32.🛟 The water for the yeast should be ___. (a) warm, not hot (b) ice cold (c) boiling hot (d) very salty
33. 33.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it turns red (c) it turns blue (d) it stays yellow
34. 34.🫧 Is detergent water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
35. 35.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) salt (c) warm water (d) a mirror
36. 36.🔮 Predict: you filter salty water through cloth. Does the salt stay on the cloth? (a) it turns to sand (b) yes, all of it (c) no, salt passes through (d) it turns to sugar
37. 37.📘 Leaves have tiny holes that let out water vapour. What are they called? (a) roots (b) petals (c) stomata (d) veins
38. 38.🌱 Which of these is not needed for a seed to sprout? (a) water (b) warmth (c) air (d) soil
39. 39.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
40. 40.🔍 Which is the odd one out? (a) folding paper (b) cooking an egg (c) melting ice (d) dissolving salt

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