Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 144 · 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.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “how hard we shake”? (a) we change it (b) we keep it the same (c) we measure it
2. 2.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the same bottle (b) size of the balloon (c) the kind of balloon (d) spoons of baking soda
3. 3.⚖️ Fair test — do seeds need water to sprout? True or false: wet or dry cotton is what we measure. (a) False (b) True
4. 4.True or false: tamarind water is a base. (a) False (b) True
5. 5.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it bursts at once (c) it grows much faster (d) it grows very little
6. 6.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) put it in your mouth (c) pour it down the sink (d) keep it for a month
7. 7.⚖️ Fair test — do seeds need water to sprout? What do we do with “how many seeds sprout”? (a) we keep it the same (b) we change it (c) we measure it
8. 8.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) lemon juice (b) a cotton bud (c) an adult with an iron (d) a balloon
9. 9.🫗 Which of these is done by winnowing? (a) sugar from sugar water (b) gravel from fine sand (c) husk from rice grain (d) tea leaves from tea
10. 10.🛟 Why must a plastic bag never go over anyone’s head? (a) it can block breathing (b) it changes colour (c) it gets wet (d) it is too big
11. 11.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) how hard we shake (b) the cream temperature (c) the amount of cream (d) time to make butter
12. 12.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
13. 13.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
14. 14.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
15. 15.⚖️ 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
16. 16.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) how hard we shake (b) time to make butter (c) the cream temperature
17. 17.True or false: turmeric powder is needed for the leafy bag test. (a) True (b) False
18. 18.True or false: baking soda water is an acid. (a) False (b) True
19. 19.🌱 Which of these is needed for a seed to sprout? (a) water (b) sunlight (c) soil (d) salt
20. 20.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
21. 21.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) salt crystals (b) nothing at all (c) tiny insects (d) tiny water drops
22. 22.True or false: a few hours is needed for the leafy bag test. (a) True (b) False
23. 23.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) it fizzes (c) few or no crystals (d) crystals grow faster
24. 24.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
25. 25.True or false: carry water upward is a job of the leaves. (a) False (b) True
26. 26.🔍 Which is the odd one out? (a) time (b) a magnet (c) vinegar (d) sunlight
27. 27.🧺 Which of these is not needed for the fizzy balloon? (a) a tray for spills (b) a seed (c) a balloon (d) vinegar
28. 28.True or false: plugging in the iron is a job for an adult. (a) False (b) True
29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) True (b) False
30. 30.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) turmeric powder (c) a magnet (d) warm water
31. 31.🛟 What should you do after handling muddy water? (a) wash hands afterwards (b) wipe hands on face (c) lick your fingers (d) nothing is needed
32. 32.🧺 Which of these is needed for sprouting seeds? (a) a battery cell (b) a mirror (c) a balloon (d) moong seeds
33. 33.🔍 Which is the odd one out? (a) dipping the cotton bud (b) letting the paper dry (c) reading the message (d) cutting the lemon
34. 34.True or false: cold water to rinse is needed for making butter. (a) False (b) True
35. 35.True or false: soap solution keeps turmeric yellow. (a) True (b) False
36. 36.🍋 Which of these steps is a job for an adult? (a) dipping the cotton bud (b) reading the message (c) writing the message (d) cutting the lemon
37. 37.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
38. 38.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
39. 39.🫧 Which of these is a base? (a) sugar water (b) plain water (c) soap solution (d) curd
40. 40.🔮 Predict: you stop shaking after only one minute. What do you have? (a) cheese (b) butter lumps (c) ghee (d) still runny cream

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