Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 212 · 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.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a tray for spills (b) baking soda (c) an empty bottle (d) a mirror
2. 2.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it turns to sugar (c) the yeast is killed (d) it glows
3. 3.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we keep it the same (c) we change it
5. 5.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a battery cell (c) yeast (d) a piece of string
6. 6.True or false: small stones from dal is done by handpicking. (a) True (b) False
7. 7.🧺 Do we need sugar for the fizzy balloon? (a) not needed (b) needed
8. 8.🪴 Through which part does a plant take in water from the soil? (a) the leaves (b) the flowers (c) the roots (d) the fruits
9. 9.🧺 Do we need a mirror for the secret lemon message? (a) not needed (b) needed
10. 10.🪴 Where did the water inside the bag come from? (a) the plastic (b) the rubber band (c) the rain (d) the leaves
11. 11.🫗 How do we separate mud from water? (a) evaporating (b) winnowing (c) filtering (d) sieving
12. 12.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
13. 13.True or false: an empty bottle is needed for the fizzy balloon. (a) False (b) True
14. 14.🔮 Predict: you use plain water instead of vinegar. What happens? (a) the balloon bursts (b) very little fizzing (c) a huge eruption (d) it turns to honey
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we change it (b) we keep it the same (c) we measure it
16. 16.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it turns yellow (c) it grows much faster (d) it grows very little
17. 17.🔍 Which is the odd one out? (a) folding paper (b) cooking an egg (c) browning lemon ink (d) rusting iron
18. 18.True or false: vinegar keeps turmeric yellow. (a) True (b) False
19. 19.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) sugar (c) a funnel or spoon (d) a balloon
20. 20.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) the filter material (b) how clear the water is (c) the same funnel
21. 21.🧺 Do we need a balloon for sprouting seeds? (a) needed (b) not needed
22. 22.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the ironing time is what we measure. (a) False (b) True
23. 23.🔍 Which is the odd one out? (a) baking a cake (b) rusting iron (c) melting ice (d) browning lemon ink
24. 24.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) in a busy doorway (c) on the edge of a table (d) next to the baby
25. 25.True or false: cotton or cloth is needed for the muddy water filter. (a) False (b) True
26. 26.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the kind of juice”? (a) we keep it the same (b) we measure it (c) we change it
27. 27.⚖️ 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 change it (c) we keep it the same
28. 28.⚖️ 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
29. 29.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) the cool cloudy day (b) the hot sunny day (c) both the same (d) neither of them
30. 30.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) throw them at friends (b) never put seeds in mouth (c) eat a few to check (d) feed them to pets
31. 31.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same funnel”? (a) we keep it the same (b) we measure it (c) we change it
32. 32.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “size of the balloon”? (a) we keep it the same (b) we change it (c) we measure it
33. 33.True or false: vinegar is not needed for the fizzy balloon. (a) False (b) True
34. 34.True or false: browning lemon ink is a change that cannot be undone. (a) False (b) True
35. 35.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
36. 36.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) an adult with an iron (b) a mirror (c) lemon juice (d) white paper
37. 37.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same glass is the one thing we change. (a) False (b) True
38. 38.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the amount of cream”? (a) we keep it the same (b) we measure it (c) we change it
39. 39.🧺 Which of these is needed for making butter? (a) a magnet (b) a balloon (c) turmeric powder (d) a bowl
40. 40.🔍 Which is the odd one out? (a) baking soda water (b) lemon juice (c) tamarind water (d) salt water

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