Definitions
An object that contains traces, remains, or evidence of living things from long ago
What is a fossil?
This gave scientists clues to understand what dinosaurs looked like?
What is fossil evidence?
This geographic feature connects two continents that were originally separated, and it is responsible for the migration of marsupials from South America to Australia.
What is a land bridge?
The extinction of many species at the same time.
What is mass extinction?
Where the oldest fossils of human ancestors were found.
What is Africa?
This was used by geologists to separate the different geologic time scales (periods, eras, etc.).
What are major events or changes in fossils?
Name the time in Earth's history: Clue #1: 65 million years ago to today Clue #2: Age of mammals
What is the Cenozoic era?
A well-known fossil group of extinct marine creatures that first appeared in the early Cambrian period.
What is the trilobite?
This is the separation of a population of organisms from the rest of its species due to some physical barrier. It can lead to divergent evolution of the two populations.
What is geographic isolation?
This event was the relatively rapid appearance (over a period of many millions of years) of many animal and plant species.
What is the Cambrian explosion?
Name the time in Earth's history, being specific about whether this was Early, Middle, or Late in the era: Clue #1: No life on land, only in the water. Clue #2: Age of invertebrates
What is the Early Paleozoic Era?
These living organisms were the first evidence of life on Earth 3.8 billion years ago.
What are single celled (unicellular) organisms?
This is a feature found all around the Earth that was evidence of a large meteorite impact and volcanism that spread ash and dust all around the Earth towards the end of the Cretaceous period.
What is the Iridium layer?
A body of water formed when ocean water floods continents.
What is an Inland Sea?
The first trace of life on earth can be traced back to this many years ago.
3.7 billion years ago.
There are _____ periods in the Paleozoic era.
What is six?
This term describes the structure of organisms from Precambrian time and is the reason we don't have many fossils from this time.
What is soft bodied?
The name of the Northern continent formed after Pangaea broke apart in the Late Triassic Period. It would eventually become North America, Europe, and Asia.
What is Laurasia?