Speciation & Geologic time

We are transitioning from speciation to geologic time.  How have all of these species evolved over   Eventually we will be examining the relationship between speciation, macroevolution and the accumulation of small change.

Look for your name below.  C period names are in Blue, G period names are in Red.


Beside it you will find two events.  You need to research these two events / organisms. Come to class with the following information:


a paragraph describing the event / organism
the date it occurred
a picture relating to the event or of the organism. 


Alejandro, Luis Carlos

* Formation of the approximately homogeneous solid Earth

* Atmospheric water is broken down by ultraviolet light to give off oxygen atoms which are incorporated into an ozone layer and hydrogen molecules which escape into space 

Andrew, Marcela

* The Earth's crust solidifies---formation of the oldest rocks found on Earth 

* Condensation of atmospheric water into oceans 

Valentina, Alina
* Prokaryotic cell organisms develop 

* Beginning of photosynthesis by blue-green algae which releases oxygen molecules into the atmosphere and steadily works to strengthen the ozone layer and change the Earth's chemically reducing atmosphere into a chemically oxidizing one 

Mackenzie, Brando
* Eukaryotic cell organisms develop * Rise of multicellular organisms                   


Bea, Antonia
* Cambrian explosion of hard-bodied organisms  

* Rise of the fish---first vertebrates 

Ximena

* Millipedes have evolved---first land animals
* Appearance of primitive sharks 

Georgia, Milly
* Rise of the amphibians
* Primitive insects have evolved 

Karina, Lizzie
* Primitive ferns evolve---first plants with roots
* Rise of the reptiles

Maja, Ryan
* Permian period mass extinction
* Pangaea starts to break apart 

Charmaine, Deborah
* Appearance of mammals
* Archaeopteryx walks the Earth

Wendell, Ali
* The Chicxulub impact occurs    

* Primitive monkeys have evolved

Arianna, Aleksandra

The chimpanzee and hominid lines evolve
Development of hominid bipedalism

Alec, Walker
Australopithecus exist
Widespread use of stone tools

Extra Credit:

For Extra credit, you may research any of the events below.  If you research all of them, you will earn a homework pass.

Most recent ice age
Homo erectus exist
Homo erectus tames fire
Homo sapiens neanderthalensis exist
Homo sapiens sapiens exist
Homo sapiens sapiens enter Australia from southeastern Asia and North America from northeastern Asia
Most recent glaciation---an ice sheet covers much of the northern United States
Homo sapiens sapiens paint the Lascaux cave