Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 862 · 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: baking soda does not dissolve in water. (a) False (b) True
2. 2.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the mud (b) nothing (c) the water (d) the salt
3. 3.🧺 Do we need a mirror for the secret lemon message? (a) not needed (b) needed
4. 4.True or false: a bowl is not needed for making butter. (a) False (b) True
5. 5.🎈 Why does the balloon blow up? (a) outside air gets in (b) vinegar is hot (c) gas is made inside (d) the bottle shrinks
6. 6.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a jar with a tight lid (b) a magnet (c) cold water to rinse (d) fresh cream
7. 7.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) how hard we shake (b) the amount of cream (c) time to make butter (d) the same jar
8. 8.🛟 How should the plastic bag be tied around the branch? (a) with a hot glue gun (b) as tight as possible (c) gently, not too tight (d) with sharp wire
9. 9.🧺 Do we need an adult with an iron for the secret lemon message? (a) not needed (b) needed
10. 10.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same glass is kept the same. (a) False (b) True
11. 11.🍋 Why can’t you see the lemon writing once it dries? (a) the paper ate it (b) dry juice is see-through (c) the ink is magnetic (d) it turned into air
12. 12.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is kept the same. (a) False (b) True
13. 13.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a jar with a tight lid (b) a timer (c) a battery cell (d) fresh cream
14. 14.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a magnet (c) a mirror (d) warm water
15. 15.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
16. 16.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it turns blue (c) it stays yellow (d) reddish-brown
17. 17.🌱 Is warmth needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
18. 18.True or false: melting butter is a change that cannot be undone. (a) True (b) False
19. 19.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the filter material (b) the same funnel (c) the same muddy water (d) the same glass
20. 20.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) both the same (b) the cool cloudy day (c) the hot sunny day (d) neither of them
21. 21.True or false: a magnet is not needed for the secret lemon message. (a) False (b) True
22. 22.🔍 Which is the odd one out? (a) milk turning to curd (b) cooking an egg (c) rusting iron (d) folding paper
23. 23.🔍 Which is the odd one out? (a) air (b) salt (c) water (d) warmth
24. 24.🔍 Which is the odd one out? (a) vinegar (b) sunlight (c) time (d) salt
25. 25.🔮 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
26. 26.True or false: turmeric powder is not needed for the secret lemon message. (a) False (b) True
27. 27.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
28. 28.📘 The browning of lemon juice with heat is a ___ change. (a) magnetic (b) musical (c) chemical (d) physical
29. 29.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) baking soda water (c) plain water (d) soap solution
30. 30.🪴 Which of these is a job of the flower? (a) make seeds (b) make food in sunlight (c) hold the plant in soil (d) carry water upward
31. 31.🔍 Which is the odd one out? (a) salt (b) sugar (c) sunlight (d) vinegar
32. 32.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) dissolving salt (c) milk turning to curd (d) melting ice
33. 33.🛟 Why must children keep their fingers away from the iron? (a) it can burn skin (b) it is magnetic (c) it is cold (d) it is sticky
34. 34.True or false: baking soda water turns turmeric reddish-brown. (a) True (b) False
35. 35.⚖️ 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 what we measure. (a) False (b) True
36. 36.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
37. 37.True or false: small stones from dal is done by sieving. (a) False (b) True
38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) the amount of water (b) days to see crystals (c) the kind of salt (d) sunny or shady place
39. 39.🧺 Which of these is needed for the muddy water filter? (a) yeast (b) a magnet (c) a mirror (d) sand and pebbles
40. 40.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt eats water (c) the dish melts (d) salt grows roots

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