Chapter 23 Separation Techniques: Mechanical and Chemical Methods
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13. Will coffee fi lters remove caffeine and tannin precipitates from a
hot cup of tea?
14. Describe the separation techniques used to convert a cooked
batch of home-grown tomatoes into tomato sauce.
15. When a partially opened jar of honey is left in the pantry too
long, what causes the honey to become fi rm?
16. Describe the separation technique at work when oil forms a
separate layer in a pourable salad dressing.
17. Freshly cut cucumbers are salted as a fi rst step to removing excess
water before preparing cucumber salad. Of what separation
technique is this an example?
18. Develop a fl owchart that demonstrates the steps to set up for
shelling and separating pecans into halves and pieces.
19. Writing. Using what you have learned in this chapter, write an
article for the school newspaper explaining the importance of
athletes drinking enough liquids during and after sports events.
Then research the topic and use this information to edit your
article. Be sure to include any new knowledge you learned. Does
the new information change your understanding? Convey any
changes of understanding in your new report.
20. Research. Select one complex food system (corn, milk, soy, or
wheat) and identify the separation technique used to develop
each of fi ve different products produced from the complex food.
21. Writing. Investigate ways that reverse osmosis is used by the
food industry. Write a report on the advantages this method has
for each type of food.
22. Research. Determine food products that are processed and
produced in your region. Research the separation techniques
that are used in as many cases as possible. Report the results
in charts, posters, bulletin boards, or slide shows.
23. Science. Research the procedure for making rock candy. Test the
procedure and the product that results.
24. Science. Distill the alcohol from vanilla fl avoring. Describe
the results.
25. Technology. Identify examples of ways the food industry recycles
by-products of food processing. Report your fi ndings with a
slideshow presentation.
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