Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 505 · 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 a cloth filter or a cotton filter give clearer water? What do we do with “how clear the water is”? (a) we keep it the same (b) we measure it (c) we change it
2. 2.True or false: a magnet is something yeast needs. (a) False (b) True
3. 3.🧺 Do we need a clear plastic bag for the leafy bag test? (a) not needed (b) needed
4. 4.🧺 Which of these is not needed for making butter? (a) a timer (b) fresh cream (c) a jar with a tight lid (d) a battery cell
5. 5.🧺 Do we need turmeric powder for making butter? (a) needed (b) not needed
6. 6.🍋 Why can’t you see the lemon writing once it dries? (a) the ink is magnetic (b) the paper ate it (c) it turned into air (d) dry juice is see-through
7. 7.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) lemon juice (c) a mirror (d) a cotton bud
8. 8.🌱 Will these sprout: seeds on dry cotton? (a) sprouts (b) does not sprout
9. 9.🧈 Which tool is used in many Indian homes to churn curd into butter? (a) a pressure cooker (b) a mathani (churner) (c) a sieve (d) a rolling pin
10. 10.True or false: a funnel is needed for the muddy water filter. (a) True (b) False
11. 11.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) the cool cloudy day (b) both the same (c) neither of them (d) the hot sunny day
12. 12.🔍 Which is the odd one out? (a) letting the paper dry (b) writing the message (c) dipping the cotton bud (d) plugging in the iron
13. 13.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: size of the balloon is what we measure. (a) False (b) True
14. 14.🪴 Where did the water inside the bag come from? (a) the plastic (b) the rain (c) the rubber band (d) the leaves
15. 15.🧺 Which of these is not needed for the muddy water filter? (a) yeast (b) muddy water (c) cotton or cloth (d) a clean glass
16. 16.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
17. 17.🪴 Which of these is a job of the leaves? (a) carry water upward (b) give out water vapour (c) hold up the leaves (d) hold the plant in soil
18. 18.True or false: soap solution is an acid. (a) True (b) False
19. 19.🫗 Which of these is done by winnowing? (a) bran from wheat flour (b) sugar from sugar water (c) husk from rice grain (d) small stones from dal
20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) True (b) False
21. 21.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the kind of balloon is kept the same. (a) False (b) True
22. 22.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the kind of plant is the one thing we change. (a) True (b) False
23. 23.🧺 Do we need a battery cell for the muddy water filter? (a) not needed (b) needed
24. 24.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
25. 25.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
26. 26.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
27. 27.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a grown-up (d) a friend who is running
28. 28.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
29. 29.True or false: vinegar is something yeast needs. (a) False (b) True
30. 30.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a battery cell (c) warm water (d) salt
31. 31.🧂 Which of these does not dissolve in water? (a) sand (b) food colour (c) baking soda (d) table salt
32. 32.🔍 Which is the odd one out? (a) lemon juice (b) detergent water (c) baking soda water (d) soap solution
33. 33.🍋 Secret message: who does this step — putting the iron away? (a) a child can do it (b) an adult does it
34. 34.🧺 Do we need a battery cell for the secret lemon message? (a) needed (b) not needed
35. 35.True or false: hold the plant in soil is a job of the roots. (a) False (b) True
36. 36.🛟 How should the plastic bag be tied around the branch? (a) with sharp wire (b) gently, not too tight (c) with a hot glue gun (d) as tight as possible
37. 37.🍋 Why does the lemon writing turn brown with heat? (a) paper turns lemony (b) the iron is brown (c) heat adds colour (d) the juice scorches first
38. 38.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is the one thing we change. (a) True (b) False
39. 39.True or false: dipping the cotton bud is a job for an adult. (a) True (b) False
40. 40.🫗 Which of these is done by sieving? (a) bad grains from rice (b) small stones from dal (c) gravel from fine sand (d) husk from rice grain

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