We use cookies to give you the best experience possible. By continuing we’ll assume you’re on board with our cookie policy

Dinosaurs (372 words) Essay

Dinosaurs
Dinosaurs: How they became extinct Something happened 65 million years ago, at
the end of the Cretaceous period, something so devastating that it altered the
course of life on earth. It seems like it happened so sudden, as geologic time
goes, that almost all the dinosaurs living on earth disappeared.

So how did
these dominant creatures just die off? Was it a slow extinction, or did it
happen all of the sudden? These questions bring rise to many different beliefs
on how the dinosaur disappeared over 65 million years ago. Extinction itself is
easily defined: When the birth rate fails to keep up with the death rate, it is
called extinction. But, the definition does not answer the question about the
nature or causes of extinction. Paleontologists generally divide extinctions
into two types, for that of different causes arose.

We will write a custom essay sample on Dinosaurs (372 words) Essay specifically for you
for only $16.38 $13.9/page

Order now

The first is called
background extinctions, isolated extinctions of species due to a variety of
causes. Included is out competition, depletion of resources in a habitat,
changes in climate, the development or destruction of a mountain range, river
channel migration, the eruption of a volcano, the drying of a lake, or the
destruction of a forest, grassland, or wetland habitat. The second type of
extinction is called mass extinctions. There are four main components involved:
Large numbers of species go extinct; many types of species go extinct; the
effects must be global; and the effects must occur in a geologically short
period of time.

1 The dinosaur could not have lived for ever. No creatures, no
plants, no tiny bacteria are forever, not even Homo sapiens. Extinction is the
fate of all species. One theory on how the dinosaurs became extinct is that of
carbon dioxide, and the ?greenhouse effect?.

Volcanoes produced the proposed
conditions. A massive volcanic eruption could have saturated the atmosphere with
carbon dioxide so that it caused a sharp rise in temperatures worldwide. The
excessive carbon dioxide would have permitted solar energy to enter the
atmosphere but would have blocked the radiation of most surface heat back out
into space, therefore causing the ?greenhouse effect?. Rising temperatures
could have killed off or reduced the activity of plankton, disrupting food
chains and also messing up the plankton?s normal role in converting carbon
dioxide to oxygen through photosynthesis.

From there it would not have been long
for all the dinosaurs to have been suffering, and then to become extinct.

Choose Type of service

Choose writer quality

Page count

1 page 275 words

Deadline

Order Essay Writing

$13.9 Order Now
icon Get your custom essay sample
icon
Sara from Artscolumbia

Hi there, would you like to get such an essay? How about receiving a customized one?
Check it out goo.gl/Crty7Tt

Dinosaurs (372 words) Essay
Artscolumbia
Artscolumbia

Dinosaurs
Dinosaurs: How they became extinct Something happened 65 million years ago, at
the end of the Cretaceous period, something so devastating that it altered the
course of life on earth. It seems like it happened so sudden, as geologic time
goes, that almost all the dinosaurs living on earth disappeared.

So how did
these dominant creatures just die off? Was it a slow extinction, or did it
happen all of the sudden? These questions bring rise to many different bel

2019-01-03 04:57:33
Dinosaurs (372 words) Essay
$ 13.900 2018-12-31
artscolumbia.org
In stock
Rated 0/5 based on 0 customer reviews