The History of Life
... Eras of the Phanerozoic eon include the Paleozoic, Mesozoic, and Cenozoic eras. ...
... Eras of the Phanerozoic eon include the Paleozoic, Mesozoic, and Cenozoic eras. ...
c1b revision sheet 1[1]
... Earthquakes can occur at the plate boundaries because huge forces push the plates against each other. Volcanoes form at weak points in the Earths crust ...
... Earthquakes can occur at the plate boundaries because huge forces push the plates against each other. Volcanoes form at weak points in the Earths crust ...
Earth: An Ever changing planet
... 3.5 to 3.9 Billion years ago (13% of Earth’s history) • Archean: Earth with only bacteria like cells 3.9 to 2.5 Billion years ago (28% of Earth’s history) • Proterozoic: Multicellular life forms 2.5 BYA to 540 MYA (48% of Earth’s history) • Phanerozoic: Dinosaurs to now • 540 MYA – present day (11% ...
... 3.5 to 3.9 Billion years ago (13% of Earth’s history) • Archean: Earth with only bacteria like cells 3.9 to 2.5 Billion years ago (28% of Earth’s history) • Proterozoic: Multicellular life forms 2.5 BYA to 540 MYA (48% of Earth’s history) • Phanerozoic: Dinosaurs to now • 540 MYA – present day (11% ...
How the Earth was Made
... 14. Plate tectonics helps to explain how continents can move. What is believed to be the primary cause of the crustal movement? ...
... 14. Plate tectonics helps to explain how continents can move. What is believed to be the primary cause of the crustal movement? ...
October 4 2016 Bellringer Intro to Living Planet
... Bellringer Intro to Living Planet ■ What are the three layers of the earth. And what do they consist of? ■ What is the biosphere, and what are its three main parts? ■ What is continental drift hypothesis? ...
... Bellringer Intro to Living Planet ■ What are the three layers of the earth. And what do they consist of? ■ What is the biosphere, and what are its three main parts? ■ What is continental drift hypothesis? ...
Geologic Time PowerPoint
... 2. The denser elements sunk to the core- iron and nickel. The lighter elements made their way to the surface as lava from the interior. Scientists believe the crust was formed by 2.5 billion years ago. The oldest rocks on earth are called Precambrian shield and the one in North America is called the ...
... 2. The denser elements sunk to the core- iron and nickel. The lighter elements made their way to the surface as lava from the interior. Scientists believe the crust was formed by 2.5 billion years ago. The oldest rocks on earth are called Precambrian shield and the one in North America is called the ...
Ch9
... Comets delivered the volatiles (primarily water) to the inner planets some 4 billion years ago, just after the formation of the solar system. ...
... Comets delivered the volatiles (primarily water) to the inner planets some 4 billion years ago, just after the formation of the solar system. ...
Evolution of Life and Mass Extinctions
... Earth’s environments changed over time, specific rocks and minerals formed, as well as deposits of fossil fuels. (ex. worldwide coal deposits of today were formed from swamps formed during the hot and humid conditions of the Carboniferous Period) Deposits of salt and gypsum are found in western NYS ...
... Earth’s environments changed over time, specific rocks and minerals formed, as well as deposits of fossil fuels. (ex. worldwide coal deposits of today were formed from swamps formed during the hot and humid conditions of the Carboniferous Period) Deposits of salt and gypsum are found in western NYS ...
Directions: Connect the words in each sentence
... Directions: Connect the words in each sentence. Always go down. ...
... Directions: Connect the words in each sentence. Always go down. ...
EVOLUTION OF EARTH
... Planet Earth condensed out of the solar nebula, a cloud of gas and dust, which collapsed under its own gravity about 4.6 billion years ago. Earth formed from accretion of many smaller boulder-to-mountain to continent sized objects, under the influence of gravity. Earth initially collected quan ...
... Planet Earth condensed out of the solar nebula, a cloud of gas and dust, which collapsed under its own gravity about 4.6 billion years ago. Earth formed from accretion of many smaller boulder-to-mountain to continent sized objects, under the influence of gravity. Earth initially collected quan ...
History of Earth
The history of Earth concerns the development of the planet Earth from its formation to the present day. Nearly all branches of natural science have contributed to the understanding of the main events of the Earth's past. The age of Earth is approximately one-third of the age of the universe. An immense amount of biological and geological change has occurred in that time span.Earth formed around 4.54 billion years ago by accretion from the solar nebula. Volcanic outgassing probably created the primordial atmosphere, but it contained almost no oxygen and would have been toxic to humans and most modern life. Much of the Earth was molten because of frequent collisions with other bodies which led to extreme volcanism. One very large collision is thought to have been responsible for tilting the Earth at an angle and forming the Moon. Over time, the planet cooled and formed a solid crust, allowing liquid water to exist on the surface.The first life forms appeared between 3.8 and 3.5 billion years ago. The earliest evidences for life on Earth are graphite found to be biogenic in 3.7-billion-year-old metasedimentary rocks discovered in Western Greenland and microbial mat fossils found in 3.48-billion-year-old sandstone discovered in Western Australia. Photosynthetic life appeared around 2 billion years ago, enriching the atmosphere with oxygen. Life remained mostly small and microscopic until about 580 million years ago, when complex multicellular life arose. During the Cambrian period it experienced a rapid diversification into most major phyla. More than 99 percent of all species, amounting to over five billion species, that ever lived on Earth are estimated to be extinct. Estimates on the number of Earth's current species range from 10 million to 14 million, of which about 1.2 million have been documented and over 86 percent have not yet been described.Geological change has been constantly occurring on Earth since the time of its formation and biological change since the first appearance of life. Species continuously evolve, taking on new forms, splitting into daughter species, or going extinct in response to an ever-changing planet. The process of plate tectonics has played a major role in the shaping of Earth's oceans and continents, as well as the life they harbor. The biosphere, in turn, has had a significant effect on the atmosphere and other abiotic conditions on the planet, such as the formation of the ozone layer, the proliferation of oxygen, and the creation of soil.