Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 154 · 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 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
2. 2.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a mirror (c) sugar (d) a small bottle
3. 3.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “how hard we shake”? (a) we keep it the same (b) we change it (c) we measure it
4. 4.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a rubber band (b) a few hours (c) a mirror (d) a potted plant
5. 5.🧺 Do we need yeast for sprouting seeds? (a) not needed (b) needed
6. 6.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is the one thing we change. (a) True (b) False
7. 7.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
8. 8.🌱 Which of these is not needed for a seed to sprout? (a) air (b) sunlight (c) warmth (d) water
9. 9.🫗 Which of these is done by filtering? (a) bran from wheat flour (b) small stones from dal (c) mud from water (d) chaff from wheat grain
10. 10.🛟 Why must the jar lid be screwed on tightly? (a) so it turns yellow (b) so it gets hot (c) so air gets out (d) so cream does not spill
11. 11.🧺 Do we need a magnet for the leafy bag test? (a) needed (b) not needed
12. 12.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) no butter forms (b) it turns to cheese (c) it turns blue (d) more butter forms
13. 13.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
14. 14.🧺 Which of these is needed for the leafy bag test? (a) turmeric powder (b) a battery cell (c) a mirror (d) a rubber band
15. 15.True or false: husk from rice grain is done by winnowing. (a) False (b) True
16. 16.📘 The browning of lemon juice with heat is a ___ change. (a) magnetic (b) physical (c) musical (d) chemical
17. 17.🧂 Which of these does not dissolve in water? (a) glucose powder (b) table salt (c) baking soda (d) chalk powder
18. 18.True or false: make food in sunlight is a job of the leaves. (a) False (b) True
19. 19.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a battery cell (b) fresh cream (c) a timer (d) cold water to rinse
20. 20.🍞 Which of these is something yeast does not need? (a) vinegar (b) sugar (c) time (d) warm water
21. 21.🧺 Which of these is needed for the fizzy balloon? (a) a seed (b) a battery cell (c) a funnel or spoon (d) a comb
22. 22.True or false: a battery cell is needed for the leafy bag test. (a) True (b) False
23. 23.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is the one thing we change. (a) True (b) False
24. 24.True or false: sand and pebbles is not needed for the muddy water filter. (a) True (b) False
25. 25.⚖️ Fair test — do seeds need water to sprout? What do we do with “how many seeds sprout”? (a) we keep it the same (b) we change it (c) we measure it
26. 26.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
27. 27.🛟 What should you do if vinegar splashes in your eye? (a) rub it hard (b) ignore it (c) add baking soda (d) rinse with clean water
28. 28.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
29. 29.True or false: a balloon is not needed for making butter. (a) True (b) False
30. 30.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
31. 31.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) a rubber band (c) a few hours (d) a battery cell
32. 32.🍋 Which of these steps is a job a child can do? (a) ironing the paper (b) putting the iron away (c) writing the message (d) cutting the lemon
33. 33.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of yeast”? (a) we keep it the same (b) we change it (c) we measure it
34. 34.🍋 Why can’t you see the lemon writing once it dries? (a) the ink is magnetic (b) dry juice is see-through (c) the paper ate it (d) it turned into air
35. 35.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) cold water to rinse (b) fresh cream (c) a timer (d) a balloon
36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the liquid we test (c) the colour we see (d) the light we look in
37. 37.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) the cream temperature (b) the amount of cream (c) time to make butter (d) how hard we shake
38. 38.🔍 Which is the odd one out? (a) food colour (b) baking soda (c) cooking oil (d) table salt
39. 39.True or false: tamarind water turns turmeric reddish-brown. (a) False (b) True
40. 40.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the iron setting is kept the same. (a) False (b) True

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