Thursday, September 21, 2017

Era Report

Era Report

      The era I am researching is the Mesozoic Era which was the era following the Paleozoic Era is followed by the Cenozoic era. This era is separated into 3 periods, the Triassic Period, the Jurassic Period, and the Cretaceous Period. The continents during this era were in Pangaea and by the mid-Triassic, Pangaea had begun to break apart. By the time the Jurassic period came along, the pieces of Pangaea were still floating along the earth's surface, there was the breaking up of the small parts of Pangaea such as the breaking up of the northern, southern, and the western pieces of Pangaea. By the time the Cretaceous period came along, the pieces of Pangaea were breaking up into small continents by the mid-cretaceous. Our position today was just on the far left end of Pangaea which slowly shifted over the Mesozoic Era. 


       One type of plant life that thrived through the Triassic period included the Horsetail, this plant has underground stems (which a dinosaur wouldn't eat), which lets dinosaurs eat the plant without killing the actual plant. This allowed the Horsetail to regrow and thrive during the Triassic period. Another type of plant during the Jurassic period was the Cycad. This plant had a unique ability to grow in all sorts of habitats for a considerable amount of time. Finally, a plant from the Cretaceous period was the Williamsonia sewardiana which was like a tree with a woody stem and simple leaves with it. This plant had survived from the Jurassic and all the way to the late Cretaceous.

       There was plenty of animal life during the Mesozoic period including the Therapsids which had survived the Permian Extinction from the era before. By the early Triassic, it appeared to show that the Therapsids would dominate the Mesozoic era. But by the mid-Triassic, most Therapsids had become extinct and new animals would dominate the era. One type of animal from the Jurassic period would be the Archaeopteryx which was known to be the earliest type of bird in history. It could fly but it wasn't a very strong flier. And finally, one animal from the Cretaceous period is the T-rex. This was a famous carnivore that dominated the late-Cretaceous and was capable of eating up to 500 pounds of meat in one bite.

        The climate during the Triassic period was influenced by Pangaea. Because of this climate during the Triassic period was hot and dry in the middle of Pangaea since they were cut off from the cool ocean air at the edges of Pangaea. And if you were on the edge of Pangaea then you probably experienced cooler, seasonal weather. Weather during the Jurassic can be found through the use of rocks which can give hints on the weather during that time period. Some of these rocks include evaporites and coals. The evaporites show evidence that warmth and low levels of moisture. The coals give clues that there were swampy conditions in the humid areas. These two rocks indicate that the Jurassic period was most likely warm, low in moisture and there were some swampy conditions with it. The Cretaceous period had weather that was influenced by Pangaea. Because Pangaea was breaking up during the Cretaceous period, the climate in all the parts of Pangaea was much cooler than it was during the Triassic and the Jurassic. Seasons began to become more pronounced as the global climate got cooler due to Pangaea breaking up.

       The Mesozoic era was the era known for the types of species it held such as dinosaurs and the first birds on earth. The breaking up of Pangaea in this era was critical to our world so it could look like how it is today. Because Pangaea broke up, this provided more cool air to the species and animals in the middle of Pangaea. The plant life in this era was unique because they could survive different environments, one that can live on even when an animal eats it and one that can survive for quite a while in all sorts of climates and habitats. In conclusion, the Mesozoic era was a unique time of evolution and events for animals and plants that allowed them to have their own unique abilities surviveive and thrive. 

Saturday, September 16, 2017

Weekly Blog 9/11 - 9/15

Image Source:
https://sciencewithmsbarton.files.wordpress.com/2013/10/radioactive-dating-game.png

Summary:
Radioactive dating is important when you want date rock or fossils. First, you find a type of material within the object. For dead things, you measure carbon, and for non-living things you measure Uranium. Next, you find out how out how many of that material is within the item. For example, the half-life of carbon-14 is 5,730 years. So say that item has 50% carbon-14 within it. This means that the item is 5,730 years old since 5,730 means that there is 50% carbon-14 remaining. So that object has been around for 5,730 years.

S&EP:
SP2: Developing and using models
This week I performed SP2: Developing and using models because I used a model to find the age of an object such as a bone. A picture of this is included above. I used a model to find the age of objects through the knowledge of the material and its half-life to determine the age of an object.

Friday, September 8, 2017

Weekly Blog | 9/5 - 9/8

Image Source:
http://usenaturalstone.com/wild-ride-rock-cycle/

Summary:
The rock cycle is a process that happens over and over again. This is a process that happens every day without us paying any attention to it, due to the speed the rock cycle operates at.  The rock cycle could be represented in different ways such as starbursts, crayons, playdoh, etc. This cycle has been going on for millions of years forever repeating itself. This is how we have different types of rocks in this world. Each rock is slowly turned into something new again and again until it gets to its original form, which from there restarts again over and over and over.

S&EP:
SP2: Developing and using models
This week I performed SP2: Developing and using models by using starbursts to represent the rock cycle by performing the processes that happen during the rock cycle like heat and pressure to turn a sedimentary rock into a metamorphic rock.

Friday, September 1, 2017

2017-2018 Year Blog | 9/1/17

Image Source:
http://www.cotf.edu/ete/images/modules/msese/earthsysflr/EFCycleP2.gif

Summary:
The rock cycle is one of the natural cycles that happen around the world. The rock cycle creates new rocks from old materials from other rocks. Say you start with an igneous rock and you want it to go through the rock cycle to become an igneous rock again. Well to do this it would have to take years through weathering and erosion to turn it into sediments, which from there would take a while for those pieces to compact and cementation to turn it into a sedimentary rock which has different layers to it. Then from there heat and pressure turn it into a metamorphic rock. From there it would have to undergo melting to turning it into magma. Finally, from there it cools down turning it back into an igneous rock. But it doesn't end there! The rock cycle will keep going for years far past our time. 

S&EP:
SP2: Developing and using models
This week I performed SP2: Developing and using models by using Gizmos to investigate the stages of the rock cycle and the way the rock cycle works over millions of years to reuse old rocks to make new ones. I also create a little chart that showed every process of the rock cycle through arrows and they each said every process the rock undergoes to get to the next stage.