Ordovician-Silurian Era Research Paper

Pottery can not only tell us about the past, but it can also tell us about people’s beliefs and what people did in the past. Pottery was used for many purposes. It was made in many different shapes and sizes. Some pieces of pottery had unique pictures and designs on them. The pictures and designs expressed different types of things that went on in the daily lives of ancient Greeks. Music and entertainment, religious beliefs, death and burial traditions are a few aspects of Greek life that are pictured on many different types of ancient Greek pottery.

Ancient civilizations have had profound effects of what we know as the modern world today. The primary purpose for anything that lives is to survive. Throughout history animals, plants and humans have adapted to their surroundings. All living things have changed throughout time. The thing that differs humans from rest is, humans are more cognitively advanced. Over the course of time the shape and size of the human skull has changed. The size of the human brain has increased, which has allowed humans to adapt more to their surroundings. To survive, humans were making tools for hunting and to cut with. The closer you lived to the equator the darker your skin may have been, so you could adapt to the intensity of the sun’s rays. If you lived further

Was it the confluence of events outlined in this review (including the prevailing global climate, volcanism), or are some of these factors secondary? For example, we have little idea of the mass of methane hydrates in the Late Permian ocean floor. These and many other questions will need to be addressed before we fully resolve the cause of the end-Permian mass extinction. However, there is a growing realisation that flood basalt volcanism has the potential to be the primary trigger for mass extinctions, rather than meteorite impacts or other external

8. The periods in which there were mass extinctions are Permian – volcanic eruptions which spewed lava and put CO2 into the air which warmed the climate an estimated 6 degrees Celsius. The resulting of oxygen deficiency. And Cretaceous – asteroid or comet

Megafaunal extinction: The extinction of large animal species such as mammoths and several species of horse and camels. No one knows what caused their extinction, whether it was from the excessive hunting or the Ice Age becoming a drier climate.

The main dinosaurs that died off were Sauropod dinosaurs, long necked, four legged dinosaurs, and stegosauridae, class holding Stegosaurus. Other species that died include ammonites, similar to the living animals called nautilus, many marine reptiles, and bivalves, relatable to modern mollusca. Not much is known about this extinction. It is mainly linked to climate change. So far, no connection to volcanic activity or an asteroid has been made. This extinction gave way to the Cretaceous Period.

The ecological conditions might have changed quickly and the species was not able to adapt to those conditions, which eventually lead the species to go extinct.

A mass extinction is an event in which at least 25-75% of species in the global environment are eradicated in a short period of time. Where as a regional extinction event is when the extinction is confined to a specific zone. Five mass extinctions have occurred throughout time, two of the most well known of these are the Permian and Cretaceous extinction events.

The initial stage was thought to have been a deadly drop in sea level that led to a loss of habitat stability. The second stage would possibly have been the volcanic eruptions and the release of carbon dioxide into the air causing oxygen levels to decrease. The final stage would possibly have been the rise of the sea levels causing massive floods and destroying near shore habitats. Having all of these three stages at one time would have caused this massive kind of extinction. However, if only one of these stages had happened this extinction would not have been nearly this massive. Studies show that even though this mass extinction may have seemed like a fast-moving process, it took over a million years to

The cretaceous-tertiary (KT) boundary extinction happened approximately sixty five million years ago. Sixty to eighty percent of all living species became extinct at this boundary (Raup 1988). The KT extinction was indeed a mass extinction event. Mass extinctions are periods in Earth's history when extremely large numbers of species die out simultaneously or within a limited time frame. The most severe mass extinction ever occurred at the end of the Permian period when 96% of all species died out. The K-T mass extinction obliterated almost all the large vertebrates on Earth, on land, at sea, and in the air (all dinosaurs, plesiosaurs, mosasaurs, and pterosaurs) suddenly became extinct at the end of the Cretaceous Period. At the same time, most

The first thing to know about this particular mass extinction is the species that inhibited the earth

The Seven Wonders of the Ancient World inspired awe and fascination during their time. There are seven wonders of the ancient world. The list was made by Antipater of Sidon. The list was made because of many reasons. Size, how it was made or the beauty of it. The only wonder of the ancient world that is still standing is the Pyramids of Giza which are located in Egypt near Cairo. The Pyramids were built by slaves and are 481 feet tall.

Ever since the history of Earth has been studied using fossil records, extinctions have always been the object of fascination and interest, particularly the mass extinctions that occurred throughout Earth's history. A mass extinction can be caused by disruptive global environmental changes, where large numbers of species have become extinct (Urry et al. 2008). There have been five major extinctions documented based on fossil records over the past 500 million years, but the Cretaceous (KT boundary extinction – a name that meant it began the Tertiary era) extinction caught a lot of

There have been five well known extinctions on this earth. The one most well known is the mass extinction that ended the dinosaurs. Mass extinction is often described as the elimination of a large number of species in a short period of time. Despite what many think, the elimination of species is almost commonplace at this point. The Earth is currently in the middle of a sixth mass extinction, and it’s been caused by the human race.

Over 98% of all organisms that have lived on Earth are now extinct. A mass extinction event occurs when a large number of species die out within a small time frame (relative to the age of Earth). Mass extinctions are intensively studied for both cause and effect, as there is usually room for debate regarding catalysts that precede the extinction and the massive influx of new biological species that follows. There have been five major mass extinctions, dubbed the “Big Five,” that have wiped out at least 50% of the species living at those times. The most well known mass extinction of the Big Five, with the decimation of every species of non-avian dinosaur, is the Cretaceous-Paleogene