Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 11 · 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.True or false: browning lemon ink is a change that cannot be undone. (a) True (b) False
2. 2.🧺 Do we need an adult with an iron for the secret lemon message? (a) needed (b) not needed
3. 3.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we change it (b) we keep it the same (c) we measure it
4. 4.🔍 Which is the odd one out? (a) plugging in the iron (b) dipping the cotton bud (c) ironing the paper (d) cutting the lemon
5. 5.True or false: vinegar is not needed for the fizzy balloon. (a) False (b) True
6. 6.🌱 Which of these does not sprout? (a) wet seeds by a window (b) seeds in the freezer (c) seeds on wet cotton (d) wet seeds in the dark
7. 7.🧺 Do we need fresh cream for making butter? (a) needed (b) not needed
8. 8.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) the amount of cream (b) the same jar (c) the cream temperature (d) time to make butter
9. 9.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: time to make butter is the one thing we change. (a) True (b) False
10. 10.🪴 Which of these is a job of the flower? (a) make seeds (b) give out water vapour (c) hold the plant in soil (d) take in water from soil
11. 11.True or false: turmeric powder is needed for the muddy water filter. (a) True (b) False
12. 12.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
13. 13.True or false: vinegar keeps turmeric yellow. (a) True (b) False
14. 14.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) nothing at all (b) tiny insects (c) tiny water drops (d) salt crystals
15. 15.🫧 What do you see when baking soda meets vinegar? (a) it turns to ice (b) nothing at all (c) it glows in the dark (d) lots of fizzy bubbles
16. 16.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) sip each liquid (c) mix bathroom cleaners (d) use only kitchen items
17. 17.🔮 Predict: the adult irons for only one second. What happens? (a) it gets darker (b) writing stays faint (c) the paper floats (d) writing turns green
18. 18.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) bigger crystals (c) smaller crystals (d) no crystals
19. 19.🫧 Which of these is neutral? (a) tamarind water (b) plain water (c) orange juice (d) curd
20. 20.🔮 Predict: you stop shaking after only one minute. What do you have? (a) butter lumps (b) ghee (c) still runny cream (d) cheese
21. 21.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a mirror (b) a funnel or spoon (c) vinegar (d) a balloon
22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we keep it the same (b) we change it (c) we measure it
23. 23.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) turmeric powder (b) a jar with a tight lid (c) fresh cream (d) cold water to rinse
24. 24.⚖️ 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 kind of salt (b) the same dish (c) the amount of water (d) days to see crystals
25. 25.🪴 Through which part does a plant take in water from the soil? (a) the fruits (b) the leaves (c) the roots (d) the flowers
26. 26.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a magnet (b) sunlight (c) a clear plastic bag (d) a rubber band
27. 27.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
28. 28.⚖️ 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
29. 29.🛟 Why should you never drink water just because it looks clear? (a) germs are invisible (b) clear water is salty (c) clear water is hot (d) clear water is sweet
30. 30.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
31. 31.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
32. 32.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) baking soda water (d) lemon juice
33. 33.True or false: a mirror is not needed for the fizzy balloon. (a) False (b) True
34. 34.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we change it (b) we measure it (c) we keep it the same
35. 35.🔍 Which is the odd one out? (a) soap solution (b) sugar water (c) detergent water (d) baking soda water
36. 36.🍋 Secret message: who does this step — plugging in the iron? (a) an adult does it (b) a child can do it
37. 37.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
38. 38.🌱 Which of these is needed for a seed to sprout? (a) sunlight (b) soil (c) salt (d) water
39. 39.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny spheres (c) tiny triangles (d) tiny cubes
40. 40.🛟 Why must the jar lid be screwed on tightly? (a) so it turns yellow (b) so cream does not spill (c) so it gets hot (d) so air gets out

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