Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 697 · 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 needed for the yeast balloon? (a) a comb (b) a magnet (c) dry yeast (d) a mirror
2. 2.🌱 Which of these does not sprout? (a) seeds on dry cotton (b) wet seeds by a window (c) seeds on wet cotton (d) wet seeds in the dark
3. 3.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) a clean glass (c) a funnel (d) yeast
4. 4.True or false: an adult with an iron is needed for the secret lemon message. (a) True (b) False
5. 5.🛟 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
6. 6.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a mirror (b) vinegar (c) baking soda (d) an empty bottle
7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we keep it the same (c) we measure it
8. 8.True or false: moong seeds is not needed for sprouting seeds. (a) False (b) True
9. 9.True or false: yeast is not needed for the muddy water filter. (a) False (b) True
10. 10.🧺 Which of these is needed for the muddy water filter? (a) cotton or cloth (b) a battery cell (c) a balloon (d) yeast
11. 11.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) dark brown words (b) almost nothing (c) blue words (d) a rainbow
12. 12.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) few or no crystals (c) it fizzes (d) it turns sweet
13. 13.🧈 What is the watery liquid left after the butter forms? (a) buttermilk (b) vinegar (c) honey (d) oil
14. 14.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it grows faster (c) it turns to sugar (d) it glows
15. 15.True or false: a rubber band is needed for the leafy bag test. (a) True (b) False
16. 16.🧺 Which of these is not needed for the yeast balloon? (a) turmeric powder (b) a balloon (c) a small bottle (d) dry yeast
17. 17.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we change it (b) we keep it the same (c) we measure it
18. 18.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) cold water to rinse (b) fresh cream (c) a bowl (d) a balloon
19. 19.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) water evaporates (c) salt eats water (d) salt grows roots
20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we keep it the same (b) we change it (c) we measure it
21. 21.🔍 Which is the odd one out? (a) dipping the cotton bud (b) ironing the paper (c) reading the message (d) writing the message
22. 22.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is what we measure. (a) False (b) True
23. 23.🫧 Is baking soda water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
24. 24.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) fresh cream (b) cold water to rinse (c) a mirror (d) a jar with a tight lid
25. 25.🧺 Do we need yeast for making butter? (a) not needed (b) needed
26. 26.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it turns blue (b) it flowers more (c) it wilts and droops (d) it grows faster
27. 27.True or false: cutting the lemon is a job for an adult. (a) False (b) True
28. 28.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we measure it (b) we keep it the same (c) we change it
29. 29.🛟 Why is a plastic jar a good choice for shaking? (a) it is magnetic (b) it will not break (c) it is heavier (d) it is hotter
30. 30.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they become magnets (b) they float apart (c) they react (d) they freeze
31. 31.True or false: melting butter is a change that cannot be undone. (a) True (b) False
32. 32.🛟 Why must children keep their fingers away from the iron? (a) it is cold (b) it is sticky (c) it is magnetic (d) it can burn skin
33. 33.True or false: melting butter is a change that can be undone. (a) False (b) True
34. 34.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) cotton wool (b) water (c) a few days (d) a mirror
35. 35.🌱 Will these sprout: wet seeds by a window? (a) does not sprout (b) sprouts
36. 36.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
37. 37.🔍 Which is the odd one out? (a) dipping the cotton bud (b) putting the iron away (c) plugging in the iron (d) cutting the lemon
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a battery cell (d) a shallow dish
39. 39.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) False (b) True
40. 40.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a battery cell (c) yeast (d) lemon juice

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