The Earth formed around 4.5 billion years ago. It is the third planet from the sun and the only known planet capable of supporting life. The Earth has a molten iron core, a solid mantle, and a crust divided into tectonic plates that migrate across the surface over millions of years. Over 70% of the Earth's surface is covered by water and life first appeared in the oceans around 1 billion years after the Earth formed. Approximately 8.74 million species currently inhabit the Earth, including billions of humans who depend on the biosphere and minerals.
Origin of the Universe and the Solar SystemNikoPatawaran
The most widely accepted theory of planetary formation, known as the nebular hypothesis, maintains that 4.6 billion years ago, the Solar System formed from the gravitational collapse of a giant molecular cloud which was light years across.
Origin of the Universe and the Solar SystemNikoPatawaran
The most widely accepted theory of planetary formation, known as the nebular hypothesis, maintains that 4.6 billion years ago, the Solar System formed from the gravitational collapse of a giant molecular cloud which was light years across.
Earth and Life Science - Theories on the Origin of the Solar SystemJuan Miguel Palero
This is a powerpoint presentation that is about one of the Senior High School Core Subject: Earth and Life Science. It is composed of the theories that explains the origin of the Solar System.
Though i am not an applied physics /B.S.C physics student ,Science has always been something of my interest :) Presentation during "International School on Astronomy and Space Science organized by Ministry of Environment, Science and Technology and B.P. Koirala Memorial Planetorium, Observatory and Science Museum Development Board "
This slideshow explains how scientists measured the size of the universe and its age, It is a miracle that this can even possible to do. The slide show also explain the discovery of the Redshift and the expanding universe. The evolution, the history and the major structure of our universe. It is only within our lifetime, these sorts of question about our origin was asked.
Earth and Life Science - Theories on the Origin of the Solar SystemJuan Miguel Palero
This is a powerpoint presentation that is about one of the Senior High School Core Subject: Earth and Life Science. It is composed of the theories that explains the origin of the Solar System.
Though i am not an applied physics /B.S.C physics student ,Science has always been something of my interest :) Presentation during "International School on Astronomy and Space Science organized by Ministry of Environment, Science and Technology and B.P. Koirala Memorial Planetorium, Observatory and Science Museum Development Board "
This slideshow explains how scientists measured the size of the universe and its age, It is a miracle that this can even possible to do. The slide show also explain the discovery of the Redshift and the expanding universe. The evolution, the history and the major structure of our universe. It is only within our lifetime, these sorts of question about our origin was asked.
This article presents how planet Earth was born, how it operates and how it is protected from threats coming from outer space. In addition to showing how the Earth operates as a dynamic system, it shows how our planet will disappear completely when the Sun migrates out of Earth's orbit in about 1 billion years.
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Earth system refers to Earth’s interacting physical, chemical, and biological processes.
The system consists of the land, oceans, atmosphere and poles.
It includes the planet’s natural cycles – the carbon, water, nitrogen, phosphorus, Sulphur and other cycles – and deep Earth processes.
Life too is an integral part of the Earth system
Reduce climate change
Ecological services generated by the living biosphere
Food production
Natural Resources
it is power point about earth and Humans and population,with lots of pictures in it.
i hope you will like it......About me : Hi !!! my name is adwityaa & i live in india and if you want you can add me as your friend on facebook or follow me on twitter..
A digital story about the universe, solar system, the sun, characteristics of the sun, the earth, characteristics of the earth and inner and outer planets of the solar system.
The Moon is a relatively large, terrestrial, planet-like natural satellite, with a diameter about one-quarter of Earth's. It is the largest moon in the Solar System relative to the size of its planet, although Charon is larger relative to the dwarf planet Pluto. The natural satellites of other planets are also referred to as "moons", after Earth's.
The gravitational attraction between Earth and the Moon causes tides on Earth. The same effect on the Moon has led to its tidal locking: its rotation period is the same as the time it takes to orbit Earth. As a result, it always presents the same face to the planet. As the Moon orbits Earth, different parts of its face are illuminated by the Sun, leading to the lunar phases; the dark part of the face is separated from the light part by the solar terminator.
Details of the Earth–Moon system, showing the radius of each object and the Earth–Moon barycenter. The Moon's axis is located by Cassini's third law.
Due to their tidal interaction, the Moon recedes from Earth at the rate of approximately 38 mm/yr. Over millions of years, these tiny modifications—and the lengthening of Earth's day by about 23 µs/yr—add up to significant changes.[221] During the Devonian period, for example, (approximately 410 Mya) there were 400 days in a year, with each day lasting 21.8 hours.[222]
The Moon may have dramatically affected the development of life by moderating the planet's climate. Paleontological evidence and computer simulations show that Earth's axial tilt is stabilized by tidal interactions with the Moon.[28] Some theorists think that without this stabilization against the torques applied by the Sun and planets to Earth's equatorial bulge, the rotational axis might be chaotically unstable, exhibiting chaotic changes over millions of years, as appears to be the case for Mars.[223]
Viewed from Earth, the Moon is just far enough away to have almost the same apparent-sized disk as the Sun. The angular size (or solid angle) of these two bodies match because, although the Sun's diameter is about 400 times as large as the Moon's, it is also 400 times more distant.[186] This allows total and annular solar eclipses to occur on Earth.
The most widely accepted theory of the Moon's origin, the giant-impact hypothesis, states that it formed from the collision of a Mars-size protoplanet called Theia with the early Earth. This hypothesis explains (among other things) the Moon's relative lack of iron and volatile elements and the fact that its composition is nearly identical to that of Earth's crust.[224]
Have you ever wondered how search works while visiting an e-commerce site, internal website, or searching through other types of online resources? Look no further than this informative session on the ways that taxonomies help end-users navigate the internet! Hear from taxonomists and other information professionals who have first-hand experience creating and working with taxonomies that aid in navigation, search, and discovery across a range of disciplines.
This presentation by Morris Kleiner (University of Minnesota), was made during the discussion “Competition and Regulation in Professions and Occupations” held at the Working Party No. 2 on Competition and Regulation on 10 June 2024. More papers and presentations on the topic can be found out at oe.cd/crps.
This presentation was uploaded with the author’s consent.
Acorn Recovery: Restore IT infra within minutesIP ServerOne
Introducing Acorn Recovery as a Service, a simple, fast, and secure managed disaster recovery (DRaaS) by IP ServerOne. A DR solution that helps restore your IT infra within minutes.
0x01 - Newton's Third Law: Static vs. Dynamic AbusersOWASP Beja
f you offer a service on the web, odds are that someone will abuse it. Be it an API, a SaaS, a PaaS, or even a static website, someone somewhere will try to figure out a way to use it to their own needs. In this talk we'll compare measures that are effective against static attackers and how to battle a dynamic attacker who adapts to your counter-measures.
About the Speaker
===============
Diogo Sousa, Engineering Manager @ Canonical
An opinionated individual with an interest in cryptography and its intersection with secure software development.
Sharpen existing tools or get a new toolbox? Contemporary cluster initiatives...Orkestra
UIIN Conference, Madrid, 27-29 May 2024
James Wilson, Orkestra and Deusto Business School
Emily Wise, Lund University
Madeline Smith, The Glasgow School of Art
2. The Earth
Earth, also known as the world, Terra, or Gaia, is
the third planet from the Sun, the densest planet
in the Solar System, the largest of the Solar
System's four terrestrial planets, and the only
celestial body known to accommodate life. It is
home to about 8.74 million species. There are
billions of humans who depend upon its
biosphere and minerals.
3. Formation of the Earth
Earth was formed around four and a half billion
years ago. Within its first billion years, life
appeared in its oceans and began to affect its
atmosphere and surface, promoting the
proliferation of aerobic as well as anaerobic
organisms and causing the formation of the
atmosphere's ozone layer.
4. Composition and structure
Earth's lithosphere is divided into several rigid segments,
or tectonic plates, that migrate across the surface over
periods of many millions of years. Over 70% percent of
Earth's surface is covered with water, with the remainder
consisting of continents and islands which together have
many lakes and other sources of water that contribute to
the hydrosphere. Earth's poles are mostly covered with ice
that is the solid ice of the Antarctic ice sheet and the sea
ice that is the polar ice packs. The planet's interior remains
active, with a solid iron inner core, a liquid outer core that
generates the magnetic field, and a thick layer of relatively
solid mantle.
5. Composition and structure
Earth is a terrestrial planet, meaning that it is a
rocky body, rather than a gas giant like Jupiter.
It is the largest of the four terrestrial planets in
size and mass. Of these four planets, Earth
also has the highest density, the highest
surface gravity, the strongest magnetic field,
and fastest rotation, and is probably the only
one with active plate tectonics.
6. Other objects interacting with the Earth
Earth gravitationally interacts with other objects
in space, especially the Sun and the Moon.
During one orbit around the Sun, the Earth
rotates about its own axis 366.26 times,
creating 365.26 solar days, or one sidereal
year. The Moon is Earth's only natural satellite.
It began orbiting the Earth about 4.53 billion
years ago.
7. Shape
The mass of the Earth is approximately
5.98×1024 kg. It is composed mostly of iron,
oxygen, silicon, magnesium, sulfur, nickel,
calcium, and aluminium. Due to mass
segregation, the core region is believed to be
primarily composed of iron, with smaller
amounts of nickel, sulfur, and less than 1%
trace elements.
8. Layers
The Earth is divided into layers: the
Lithosphere, the Crust, the Upper Mantle, the
Mantle, the Asthenosphere, the Outer Core and
the Inner Core.
9.
10. Pollution
Clouds of choking smog; beaches coated in oil;
rivers turned red by chemicals. All of these are
obvious examples of pollution. However, not all
types of pollution are easily seen. For example,
invisible plumes of gas may drift over our towns
and cities. They can cause asthma and chest
problems. They can also kill trees.
11. Pollution
Another problem is finding out the size of the
area affected. Winds can blow pollutants
across thousands of kilometres, from one side
of an ocean to the other. Chemicals flowing
down large rivers can pollute many countries
on their way to the sea.
12. Effects of pollution
1. Environment Degradation.
2. Human Health.
3. Global Warming: The increase in CO2 leads to melting
of polar ice caps which increases the sea level and pose
danger for the people living near coastal areas.
4. Ozone Layer Depletion: Ozone layer is the thin shield
high up in the sky that stops ultra violet rays from reaching
the earth. As a result of human activities, chemicals were
released into the atmosphere which contributed to the
depletion of ozone layer.
13. We must help the world!
Greenpeace is an independent global campaigning
organisation that acts to change attitudes and
behaviour, to protect and conserve the environment
and to promote peace. It is present in 40 countries
across Europe, the Americas, Asia, Africa and the
Pacific.
Greenpeace exists because this fragile earth deserves
a voice. It needs solutions. It needs change. It needs
action.
14. The Big Bang
The Big Bang Theory is the leading explanation
about how the universe began. At its simplest,
it talks about the universe as we know it
starting with a small singularity, then inflating
over the next 13.8 billion years to the cosmos
that we know today. The Big Bang theory
speculates that out of a great chaotic explosion
came all of the order and complexity that we
see around us today, with no intelligence
required to plan out, design or build anything.
15.
16. In some years...
If we continue with pollution live won´t be
possible because the clima won´t be
appropiate. We wouldn´t be able to breath and
if the ozone layer continues breaking like it´s
doing now in some years we will disappear.
17.
18. Videos
The Earth -
http://www.youtube.com/watch?v=JGXi_9A__Vc
The Big Bang -
http://www.youtube.com/watchv=wNDGgL73ih
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