Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 514 · 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: lemon juice is needed for the turmeric test. (a) False (b) True
2. 2.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is what we measure. (a) False (b) True
3. 3.📘 The browning of lemon juice with heat is a ___ change. (a) physical (b) magnetic (c) musical (d) chemical
4. 4.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
5. 5.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) crystals grow faster (c) few or no crystals (d) it turns sweet
6. 6.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) dissolving salt (c) melting butter (d) milk turning to curd
7. 7.🔮 Predict: you stop shaking after only one minute. What do you have? (a) cheese (b) ghee (c) still runny cream (d) butter lumps
8. 8.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a mirror (b) baking soda (c) a balloon (d) an empty bottle
9. 9.True or false: make food in sunlight is a job of the roots. (a) True (b) False
10. 10.⚖️ 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 measure it (c) we keep it the same
11. 11.True or false: a magnet is something yeast needs. (a) False (b) True
12. 12.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
13. 13.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny stars (c) tiny triangles (d) tiny spheres
14. 14.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a timer (b) a jar with a tight lid (c) fresh cream (d) a balloon
15. 15.🧺 Do we need a cotton bud for the secret lemon message? (a) needed (b) not needed
16. 16.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) in a busy doorway (d) safe from small children
17. 17.🧺 Which of these is not needed for the fizzy balloon? (a) baking soda (b) vinegar (c) a funnel or spoon (d) a mirror
18. 18.🎈 Why does the balloon blow up? (a) outside air gets in (b) gas is made inside (c) the bottle shrinks (d) vinegar is hot
19. 19.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a mirror (c) yeast (d) turmeric powder
20. 20.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a balloon (b) a clean glass (c) muddy water (d) sand and pebbles
21. 21.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it turns to sand (b) it floats on top (c) it dissolves (d) it sinks to the bottom
22. 22.🧺 Which of these is not needed for growing salt crystals? (a) yeast (b) salt (c) warm water (d) a piece of string
23. 23.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the amount of vinegar (b) the same bottle (c) size of the balloon (d) spoons of baking soda
24. 24.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sip each liquid (c) sniff each bottle hard (d) use only kitchen items
25. 25.🧺 Which of these is not needed for making butter? (a) a bowl (b) a magnet (c) fresh cream (d) a jar with a tight lid
26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we change it (b) we keep it the same (c) we measure it
27. 27.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we keep it the same (b) we change it (c) we measure it
28. 28.🧺 Do we need yeast for making butter? (a) not needed (b) needed
29. 29.True or false: turmeric powder is needed for the secret lemon message. (a) True (b) False
30. 30.🍋 What colour does the lemon writing turn when an adult warms it? (a) white (b) green (c) blue (d) brown
31. 31.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) muddier (b) hot (c) salty (d) clearer
32. 32.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) a magnet
33. 33.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to wash dishes (c) to colour rice (d) to clean floors
34. 34.True or false: tea leaves from tea is done by filtering. (a) False (b) True
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a shallow dish (c) salt (d) a balloon
36. 36.True or false: make food in sunlight is a job of the flower. (a) False (b) True
37. 37.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
38. 38.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: how dark the writing is is kept the same. (a) True (b) False
39. 39.🫧 Which of these is an acid? (a) curd (b) baking soda water (c) salt water (d) sugar water
40. 40.🧺 Do we need a battery cell for the muddy water filter? (a) needed (b) not needed

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