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x3 x3 x3 x3 x3 x3 x3 x3 x3 x3 x3 x3 x3 x3 x3 x3
x3 x3 x3 x3 x3 x3 x3 x3 x3 x3 x3 x3 x3 x3 x3 x3

... Materials of different densities separate out in a process called Differentiation: denser materials sink to Earth’s core and less dense materials rise the surface. ...
requirements necessary to obtain an Oceanography Merit Badge
requirements necessary to obtain an Oceanography Merit Badge

... important properties of water. Tell how the animals and plants of the ocean affect the chemical composition of seawater. Explain how differences in evaporation and precipitation affect the salt content of the oceans. 6. Describe some of the biologically important properties of seawater. Define benth ...
Studying the Ocean Biosphere - USF College of Marine Science
Studying the Ocean Biosphere - USF College of Marine Science

... 4) Now that we have our hypothesis, an experiment must be designed and performed using controlled conditions to test the hypothesis. When scientists perform experiments, they are careful to manipulate or change only one condition (the independent variable) at a time. All other conditions (the depen ...
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Oceanography Chapter 4 Bathymetry

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1 One of the most important aspects of understanding ocean life is

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2014 Ocean Sciences Meeting 27 February 2014 8:45 a.m.
2014 Ocean Sciences Meeting 27 February 2014 8:45 a.m.

... Scientists are also piloting a project using instruments ingested by sharks and other top ocean predators, like tuna, to gain new awareness into these animals’ feeding habits. The instruments, which use electrical measurements to track ingestion and digestion of prey, can help researchers understand ...
Part 2…Plate Tectonics
Part 2…Plate Tectonics

... 1. How much of the earth’s surface is beneath the water? 2. What was the ocean bottom thought to be like in early times/ 3. What technologic advances greatly improved our ability to envision the ocean bottom? 4. What is the mid ocean ridge system? What are its dimensions? 5. What interesting propert ...
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to Ch. 14, 16 Notes

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File

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Chapter 9. Conclusions on Major Ecosystem Services Other than

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FAQ 6.1 | Could Rapid Release of Methane and Carbon

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Continental Margins and Marginal Seas

... carbonate per unit area accumulate in the coastal oceans than in the open oceans. In addition, the gas exchange fluxes of carbon and nitrogen in the coastal waters are considerably higher than in the open oceans per unit area. As a result, around 14 per cent of total global ocean production, 80-90 p ...
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An Educator`s Guide - American Museum of Natural History

... diversity and balance of life in the ocean. Though vast, the ocean is actually quite fragile and vulnerable. ...
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Ocean acidification



Ocean acidification is the ongoing decrease in the pH of the Earth's oceans, caused by the uptake of carbon dioxide (CO2) from the atmosphere. An estimated 30–40% of the carbon dioxide from human activity released into the atmosphere dissolves into oceans, rivers and lakes. To achieve chemical equilibrium, some of it reacts with the water to form carbonic acid. Some of these extra carbonic acid molecules react with a water molecule to give a bicarbonate ion and a hydronium ion, thus increasing ocean acidity (H+ ion concentration). Between 1751 and 1994 surface ocean pH is estimated to have decreased from approximately 8.25 to 8.14, representing an increase of almost 30% in H+ ion concentration in the world's oceans. Since current and projected ocean pH levels are above 7.0, the oceans are technically alkaline now and will remain so; referring to this effect as ""decreasing ocean alkalinity"" would be equally correct if less politically useful. Earth System Models project that within the last decade ocean acidity exceeded historical analogs and in combination with other ocean biogeochemical changes could undermine the functioning of marine ecosystems and disrupt the provision of many goods and services associated with the ocean.Increasing acidity is thought to have a range of possibly harmful consequences, such as depressing metabolic rates and immune responses in some organisms, and causing coral bleaching. This also causes decreasing oxygen levels as it kills off algae.Other chemical reactions are triggered which result in a net decrease in the amount of carbonate ions available. This makes it more difficult for marine calcifying organisms, such as coral and some plankton, to form biogenic calcium carbonate, and such structures become vulnerable to dissolution. Ongoing acidification of the oceans threatens food chains connected with the oceans. As members of the InterAcademy Panel, 105 science academies have issued a statement on ocean acidification recommending that by 2050, global CO2 emissions be reduced by at least 50% compared to the 1990 level.Ocean acidification has been called the ""evil twin of global warming"" and ""the other CO2 problem"".Ocean acidification has occurred previously in Earth's history. The most notable example is the Paleocene-Eocene Thermal Maximum (PETM), which occurred approximately 56 million years ago. For reasons that are currently uncertain, massive amounts of carbon entered the ocean and atmosphere, and led to the dissolution of carbonate sediments in all ocean basins.
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