These first people migrated to the North American continent around 35,000 B.C.E. During this time period, the world was experiencing a pre-historic glacial period which resulted in huge amounts of the world’s water beginning frozen over. Additionally, sea levels dropped so dramatically that areas such as the Bering Strait became grassy plains. The Bering Strait for all purposes became a land bridge that enabled humans and animals to cross over into grassy Alaska from Icy Siberia.
Throughout and after an ice age, eustatic change takes place. At the start of an ice age, the temperature falls and water is frozen and stored in glaciers inland, suspending the hydrological cycle. This results in water being taken out of the sea but not being put back in leading to an overall fall in sea level. Conversely, as an ice age ends, the temperature begins to rise and so the water stored in the glaciers will renter the hydrological cycle and the sea will be replenished, increasing the sea levels. Increases in temperature outside of an ice age will also affect the sea level
The first people recorded living there were Native Americans called the Jaradite Nation. A few years after Columbus’s discovery, citizens from Europe came over to the Americas and made it a colony under Europe’s rule. The movement was peaceful until the Europeans became greedy for land and started pushing the Native Americans westward across America. While trying to take care of all the land the colony’s inhibitors kept getting sick. To solve the workload problem, colonist started importing Africans to make them work cruelly making America what it is today.
Lastly, the Natives were exposed to many European diseases they had never encounters before. The diseases devastated the populations like nothing
The Cambrian Period is the first period of the paleozia period. It is characterized by the appearance of a wide tange of complex, fossilizable multicellular organisms, meaning that it was around this time, that fossils have been indentified from this time. A wide range of species emerged from this period including trilbotes, brachiopods, arthropods and conodonts. Mass extinction ended the Cambrian period. Advancing glaciers would have lowered the temperature of the shallow seas therefore such big changes in temperature would alter the amount of oxygen in the water and meant the end for any species that couldn’t adapt.
He was a doctor, she was a Sunday school teacher. That year they placed their mission with the Cayuse tribe near Fort Walla Walla. Other missionaries, Henry and Eliza Hart Spalding placed a mission 125 miles away with the Nez Percés tribe. The Whitmans thrived at first, but over the next decade, the Cayuse knew the missionaries brought more Whites and diseases with them. In 1847, the Cayuse attacked the mission, killing the Whitemans and other Whites.
Yes, climate change will result in the extinction of species. * 7Global warming will melt down some of the glacier, which will destroy the habitat of species that are living near the South and North Pole. Eg. Polar bear; Penguin * 2The melt down of ice will raise the water level; species that used to live in low lands will now have nowhere to live. * 1In western North America, global warming results in reduction of availability of water for ecosystem.
Also, due to the fact that more water is reaching the oceans, sea levels have risen by nearly 1 meter over the past century. This puts all coastal cities and shorelines at a risk for flooding. As temperatures increase, many plants and animals will migrate toward the poles as their current habitats become unsuitable. As a result, ecosystems will change and biodiversity will be lost. Approximately 30% of species will become extinct by 2050.
First, the melting of ice caps and glaciers is releasing water into the oceans. Second, human activities, such as the burning of fossil fuels, combined with natural activities, it causes the rise of the earth's surface temperature.3 Second, climate change is already having a serious effect on every continent and throughout the world’s ocean. The consequences of sea level rise mainly reflected in three aspects: cultural heritages, indigenous communities and coastal lands. 4 First, sea level rise threats cultural world heritage. Data shows that 136 out of 700 listed cultural heritages throughout the world will be affected in the long term.
Throughout the past 40 million years our Earth has been in a continuous ice age. This period is considered an ice age because of the ongoing presence of an ice sheet that currently covers Antarctica. An ice age can be thought of as a period of time where the Earth’s climate is constantly reducing in temperature, which causes the formation of ice sheets and glaciers. This cooling of the Earth doesn’t happen all at once, it goes through cycles of warm and cold weather. The colder cycles are referred to as glacial periods and the warmer cycles are referred to as interglacial periods.