Mira's Science Blogs

This is an image of our poster Summary: The Mesozoic Era took place 245 to 66 million years ago. This era is divided into three periods, known as Triassic, Jurassic, and Cretaceous. First is the Triassic period, taking place 245-208 million years ago. During this period, the first dinosaurs, crocodiles, and turtles evolved. Some plants during this time include cone-trees and other palm-like trees. The next period is the Jurassic period, taking place around 208-144 million years ago. During this period, dinosaurs became more common and roamed on land. Some of the first birds started appearing, and various mammals became more common. The last period during this era is the Cretaceous period, taking place 144-66 million years ago. During this era, the first flowering plants started appearing. At the end of this era, a mass extinction caused the extinction of many organisms, including the dinosaurs. Backward-Looking How much did you know about the subject before we started? ...

File:Geologic Clock with events and periods.svg  by  Woudloper   Summary: The Mesozoic Era took place 245 to 66 million years ago. The Mesozoic era can be divided into three periods, known as Triassic, Jurassic, and Cretaceous. The first period is the Triassic period, which happened around 245-208 million years ago. During this period, the first dinosaurs, crocodiles, and turtles evolved. Cone-trees and other palm-like trees dominated the forests. The next period is the Jurassic period, taking place around 208-144 million years ago. During this period, large dinosaurs roam the world. Some of the first birds started appearing, and various mammals became more common. The last period during this era is the Cretaceous era, taking place 144-66 million years ago. During this era, the first flowering plants started appearing. At the end of this era, a mass extinction caused the disappearance of many organisms, mainly dinosaurs. During the Mesozoic era, the world wa...

The rock cycle by Tasman Walker Summary Geology is the study of rocks. In other words, it is the study of the structure of the planet, and the various forces that make and make and shape the earth. The three main types of rocks are igneous rocks, sedimentary rocks, and metamorphic rocks. These rocks are classified by how they look, and how they are formed. There are five transformations that can affect a rock. These include heat & pressure, melting, cooling, weathering & erosion, and compacting & cementing. Whenever a transformation takes place, a rock will change from one form to another, traveling through the rock cycle! The first type of rock is a sedimentary rock. Sedimentary rocks are formed from particles of sand, pebbles, shells, and sediments. The sediments gradually create layers and eventually harden into rock. They are made of sediments that have been deposited and then pressed together. Sedimentary rocks are pretty soft and may break apart easily...