Wednesday, April 20

yesterday we discussed fossils obviously mostly the what and how today will be more of the why and perhaps how does that contribute to how that ourselves today we left off on page 154 we left off on page 158 go to page 154

Grayson its not sustainable to be ready for class 10 minutes after it starts

so starting out with the section what do fossils reveal okay Grayson

*Grayson reads*

so the fossil record is basically a record of all fossils and the name of the chapter is the fossil record and that is because it is the record of all fossils if somethings extinct it means all the members are dead or have given rise to new species all the fossils we find are of species that are extinct because in the amount of time they take to form it is the amount of time for the fossils to form we’ve got the dinosaur for one the dodo bird the saber tooth the woolly mammoth basically anything from the ice age trilogy yes jack can i sharpen my pencil you didn't do that in all the time we spent preparing for this class

and so overtime a new species of a fossil is discovered we try to put it in a timescale to say in which order they brought up rise, talon

*talon reads*

so if we look at this stopwatch looking thing it puts into perspective how this era s produced over time this shows that over 90% of life was in the Precambrian periods the Cenozoic era is us our species came around near the end of that era that wittle wittle tip of that era is the time that humans excisted so on the next page or 2 we have a pretty good ecample of our time section we don’t know much anout the Precambrian time bc much of the organism then were algae and bacteria so they dont make for good fossils so wer know very little about that time and jelly fish whcich is interisting for ecample look a couple periods on adn we see a thing called land plants jelly fish existed before plants sharks excised before trees we move along a little further we have the Mesozoic era know dinosaur lived mostly in a period and then we got the Cenozoic which has lasted about 60 million years like the abortionist cat lived then and then there the homo sapiens us and we will see things we have never seen the geologic time scale is kinda like a calendar but doesn't measure times but animals

*interruption*

in writing the test on of the questions i wrote was which one of the time scales was the longest my answer would be the Precambrian

*silence*

so when you get the rime read through some of this next page so in general the formation of a fossil is a pretty rare event even rarer than that is us discovering a fossil and if their isn't a fossil for it we have no idea if it ever existed so if the’re extinct and didn't leave behind a fossil we will never know it existed so the question is how did the get there so we will start off with unanswered questions next reader santi

*santi reads*

lets move onto mass extinctions Cason

*Cason reads*

so in extinction is when a species no longer has any of its members alive when that happens to a lot of species we call that a mass extinction event so the leading hypothesizes for mass extinction is climate change so what were pretty sure about is that the asteroid that hit the earth killed the diagnostician kind if its to a large enough scale then the sun gets blocked off and that creates starvation and all organisms get their energy from the sun maybe less bit d will make us depressed or what ever and eventually everyone will be nourished and suffer

*colleen breaks from typing because of hand cramp*

*Nevaeh makes Nevaeh noise really loud*

we would expect hterf toe falkesfhavjdbsufj

*dies*

*colleen gives up on this section of typing*

*Ms. Johnson glares at me*

*Ellie noises*

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