Essay On Ice Age

The earth has gone through many periods of what is known as an ice age. An ice age is caused by the fluctuation in incoming solar radiation. This was most likely due to the significant changed in Earth’s climate during the Quaternary period, approximately 2.58 million years ago to 0.012 million years ago. The last ice age ended about 11,700 years ago. The last ice age ended because of many factors, three of which are the main cause. The size of the ice was very large which caused the ice to become unstable. This meant that the ice would be prone to cracking. There was also a change in the orbit. The sun was becoming more and more intense in the northern hemisphere, pressuring the ice to crack off and melt. The effect of these two changes was that the ice that was cracking off and melting caused a change in the circumpolar winds. The circumpolar winds then caused a release of carbon dioxide into the atmosphere, which melted the ice sheets and caused a global

This not only affects the fish but it affects us as well. Water becomes contaminated, and so does our food source and even our source of drinking water. BPA is a chemical that is commonly used to harden plastic. It is not uncommon for areas of water to become contaminated with this chemical. The chemical for aquatic life and human life can have adverse side effects for as many as three generations later. The chemical has been found to reduce reproductive fertilization and increased embryo mortality. The effect of this could eventually cause extinction of a species. If the rate of fertilization decreases and mortality increases, then less and less of that specie will be around and with a predator/prey scenario, it’s less likely to have more offspring. In addition, if the predator becomes exposed to the chemical through its prey then the predator could also have the same effects as the prey