网范文：“Age of the Dinosaurs ” 小论文讲的是处于中生代时期的地球。恐龙时代也被称为中生纪时代,它被划分为三个时期称之为三叠纪(245至2.08亿年前),侏罗纪(208至1.45亿年前),和白垩纪(145至6600万年前)。地球在中生代时期与今天大不同。地球是一个大陆整体,而今天是7大板块。 The Age of Dinosaurs The "Age of Dinosaurs" also known as the Mesozoic Era began over 245 million years ago. It was divided into three periods call the Triassic (245 to 208 million years ago), Jurassic (208 to 145 million years ago), and the Cretaceous (145 to 66 million years ago). The earth during the Mesozoic Era was very different than it is today. The earth was only one continent whereas today it is seven. This huge super-continent was called Pangea. During the Jurassic period Pangea was separated into two continents known as Laurasia and Gondwanaland, and during the Cretaceous period, the continents as we know them today began to appear. Just as in the future the continents we look much different as know them now. Evidence show that at the beginning of the Triassic period, before the dinosaurs appeared, the global temperature of the Earth was averaged around 50 degrees to 60 degrees Fahrenheit. Although the end of the period the temperature became hotter and the humidity became drier. Desserts also began to appear. Ginkgo trees and fern forests began to appear in the Northern Hemisphere while close to the equator conifer triassic.-X |
