When more than 50% of species over a period of time die, it is called ________________

if the last member of the species dies it is called

It is the calendar scientists use to outline the history of life on Earth, It is organized in chronological order with all the fossils of past life on earth.

Analyzing the age of remains of organic matter through the decaying of carbon atoms.

•The atmosphere was made of gases such as water, carbon dioxide and nitrogen.

•Eukaryotes, which are more complex than prokaryotes, evolved about 1 billion years ago

•Sponges, corals, snails, clams, squids and trilobites appeared in this era

•By the end of this era, forests of giant ferns, club mosses, horse tails and conifers covered much of the earth.

•It began 251 million years ago and ended about 65million years ago.

•Dinosaurs dominated this era for about 150 million years

•The first birds appeared in this era

•Flowering plants appeared in this era.

•Many kinds of mamals, birs, insects and flowering plants appeared.

You are in this era

It is a group of mammals that includes humans, apes, mokeys and lemurs.

Homo Neantherthalensis

Homo Sapiens

belong to

Homo habilis and Homo Erectus

belong to

It is a smaller family within the primates characterized by bipedalism, long lower limbs and lack of tail