a Early Earth Age of Our Earth Blog

a Early Earth

Age of Our Earth § Blog - Cosmic Calendar According to the scientific community: • The big bang happened on the _____ on • • the cosmic calendar Our galaxy was formed - _____ billion years ago Our Universe was formed - ____ billion years ago Life on earth began _______ billion years ago Human life began _____ years ago – the last ___________ of the cosmic calendar.

Pangaea what was it? § 1) was a supercontinent that formed approximately 300 million years ago. § 2) It began to break apart around 100 million years after it formed. § 3) The single global ocean which surrounded Pangaea is named Panthalassa.

What evidence is there that points to the existence of Pangea? The distribution of fossils across the continents

Continental Drift § Movement of the earth’s crust – The plates slowly moved to where they are today. – Moves about 0. 8 - 2 inches a year

Types of Earth Movements 1). Convergent: when 2 plates collide into each other – Result s mountains formed 13, Mt. Everestelevation 29, 029 ft. (5. 5 mi)

Types of Movements 2). Divergent: when 2 plates separate from each other – Result s valleys formed

Types of Movements 3). Transverse: when 2 plates rub against each other – Result s earthquakes

Pacific Ring of Fire § A majority of the world’s fault activity falls along the edge of the Pacific Ocean