Answer:
1. phytoplankton blooms
Explanation:
- A dead zone is a zone that is created by the presence of the dead and decomposing matter of the plant an abiotic component that depletes the oxygen and thereby creating a thick layer of nutrient-rich deposits in the aquatic environment that does not support the marine and fish life.
- They may result from agricultural, industrial and urban flows. And the changes that occur with the climate changes and the seasonal cycles of the earth. There are four types of dead zones classified on their lengths.
<u>Permanent </u><u>dead zone i.e the rarely exceed 2 milligrams per liter.
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<u>Temporal </u><u>dead zones i.e the short-lived dead zone that lat flour hours a day.
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<u>Seasonal </u><u>dead zones occur annually mostly in the summer months.
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<u>The </u><u>hypoxic </u><u>zone that occurs in the night time.
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The baltic seas, Chesapeake bays, Lake Erie, and the other zone are affected by these blooms of algae and other foreign substances.
I think it's A but here's an explanation anyway: as you heat the crude oil, the different hydrocarbons, having different boiling points, boil and evaporate up the column. Those with lower boiling points, shorter in chain length, will condense nearer the top of the fractional distillation column. Those that are more viscous, larger in chain size, will have high boiling points, so will evaporate last and condense lower down in the column. Therefore, you achieve all the different oils / materials (oil, petrol, gasoline, tar etc etc). I hope this helps. If not, then a good website to use is 'BBC bitesize, fractional distillation'.
Answer:
20 countries
Explanation:
The Spanish is one of the most spoken languages in the world. The main reason behind this is the influence the Spanish had in the Americas when they colonized very big portions of the two continents.
This language originates in Spain and spread out in the '' Age of Discoveries''. It is a language to belongs to the Romance languages, together with the likes of the Italian, Romanian, French, and Portuguese, and it is part of the Indo-European language family.
There are 20 countries in the world where the Spanish is an official or national language at the moment, those countries being Spain, Mexico, Colombia, Argentina, Peru, Ecuador, Bolivia, Venezuela, Chile, Paraguay, Uruguay, Cuba, Guatemala, Dominican Republic, Honduras, El Salvador, Nicaragua, Panama, Costa Rica, and Equatorial Guinea. Pureto Rico also has the Spanish as official language, but it is not a sovereign country.
I believe ‘Forest Park’ St. Louis Missouri
