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An atmosphere, meaning 'vapour', and
is a layer or a set of layers of gases
surrounding a planet or other material body, that is held in place by the gravity of
that
body. An atmosphere is more likely to be retained if the gravity it is subject to is
high
and the temperature of the atmosphere is low.
The atmosphere of Earth is composed of nitrogen , oxygen , argon, carbon dioxide and
other
gases in trace amounts. Oxygen is used by
most organisms for respiration; nitrogen is fixed by bacteria and lightning to produce
ammonia used in the construction of nucleotides and amino acids; and carbon dioxide is
used
by plants, algae and cyanobacteria for photosynthesis. The atmosphere helps to protect
living organisms from genetic damage by solar ultraviolet radiation, solar wind and
cosmic
rays. The current composition of the Earth's atmosphere is the product of billions of
years
of biochemical modification of the paleoatmosphere by living organisms.
The term stellar atmosphere describes the outer region of a star and typically includes
the
portion above the opaque photosphere. Stars with sufficiently low temperatures may have
outer atmospheres with compound molecules.
See how the text breathes.
La composition initiale de l'atmosphère d'une planète
dépend
des caractéristiques chimiques et de la température de la nébuleuse mère durant la
formation du système planétaire. Par la suite, la composition exacte de l'atmosphère
d'une planète dépend de la chimie des gaz qui la composent et des apports de gaz par le
volcanisme. Les interactions entre ces différents gaz dépendent quant à elles de la
température et des types de radiations solaires atteignant la planète.
I will prove that it can be done.
√ $
Une monnaie se caractérise par la confiance qu'ont
ses utilisateurs dans la persistance de sa valeur et de sa capacité à servir de
moyen d'échange. Elle a donc des dimensions sociales, politiques, psychologiques,
juridiques et économiques. En période de troubles, de perte de confiance, une
monnaie de nécessité peut apparaître.
Avec une superficie de 14 millions de kilomètres carrés,
l'Antarctique est plus petit que l'Asie, l'Afrique ou l'Amérique ; seules l'Europe et
l'Océanie sont plus petites que lui. Quelque 98 % de sa surface sont recouverts d'une
couche
de glace d'une épaisseur moyenne de 1,6 km. C'est pourquoi la morphologie du sous-sol
antarctique reste encore peu connue voire inconnue, alors que petit à petit se dévoile
la
présence de lacs subglaciaires et de chaînes de montagnes subglaciaires comme celle de
Gamburtsev. L'Antarctique est le continent le plus froid, le plus sec et le plus
venteux.
C'est également, de tous les continents, celui qui a l'altitude moyenne la plus élevée.
Puisqu'il n'y tombe que peu de précipitations, excepté sur ses parties côtières où elles
sont de l'ordre de 200 mm par an, l'intérieur du continent constitue le plus grand
désert du
monde.
Antarctica
ć ĉ č ċ
You found a way
Morphing is a special effect in motion
pictures and animations that changes one image or shape into another through
a seamless transition.
Cool
Earth's atmosphere consists mostly of nitrogen and
oxygen. Tropical regions receive more energy from the Sun than polar regions, which is
redistributed by atmospheric and ocean circulation. Greenhouse gases also play an
important role in regulating the surface temperature. A region's climate is not only
determined by latitude, but also by its proximity to moderating oceans and height among
other factors. Extreme weather, such as tropical cyclones and heat waves, occurs in most
areas and has a large impact on life.
Earth's gravity interacts with other objects in
space, especially the Sun and the Moon, which is Earth's only natural satellite.
Earth orbits around the Sun in about 365.25 days. Earth's axis of rotation is tilted
with respect to its orbital plane, producing seasons on Earth. The gravitational
interaction between Earth and the Moon causes tides, stabilizes Earth's orientation
on its axis, and gradually slows its rotation. Earth is the densest planet in the
Solar System and the largest and most massive of the four rocky planets.
æ ǽ
To the future
We need to hear positive approaches
Reassure people
Find main reasons
Surface gravity differs significantly among the
planets. For
example,
the large gravitational force of the giant planet Jupiter retains light gases such as
hydrogen and helium that escape from objects with lower gravity.
According to radiometric dating estimation and other evidence,
Earth formed over 4.5 billion years ago. Within the first billion years of Earth's
history, life appeared in the oceans and began to affect Earth's atmosphere and surface,
leading to the proliferation of anaerobic and, later, aerobic organisms. Some geological
evidence indicates that life may have arisen as early as 4.1 billion years ago. Since
then, the combination of Earth's distance from the Sun, physical properties and
geological history have allowed life to evolve and thrive. In the history of life on
Earth, biodiversity has gone through long periods of expansion, occasionally punctuated
by mass extinctions. Over 99% of all species that ever lived on Earth are extinct.
Almost 8 billion humans live on Earth and depend on its biosphere and natural resources
for their survival. Humans increasingly impact Earth's hydrology, atmospheric processes
and other life.
* § *
Pri plynných a plazmových telesách je atmosféra ich
prirodzenou súčasťou už od čias ich formovania.
2+31
8/4+7
2*(9-4)/14+53
7*5-98/{95+62*35}+745/(639/89)
Money has the roots of evil.
boldness
willingness to take risks and act
innovatively;
confidence
or courage.
é è ê ë ě ē ė ę
Are you still thinking?
Let us abandon the theme.
Earth's mass is approximately 5.97×1024 kg (5,970
Yg). It is composed mostly of iron (32.1%), oxygen (30.1%), silicon (15.1%),
magnesium (13.9%), sulfur (2.9%), nickel (1.8%), calcium (1.5%), and aluminum
(1.4%), with the remaining 1.2% consisting of trace amounts of other elements. Due
to mass segregation, the core region is estimated to be primarily composed of iron
(88.8%), with smaller amounts of nickel (5.8%), sulfur (4.5%), and less than 1%
trace elements.[98]
The most common rock constituents of the crust are nearly all oxides: chlorine,
sulfur, and fluorine are the important exceptions to this and their total amount in
any rock is usually much less than 1%. Over 99% of the crust is composed of 11
oxides, principally silica, alumina, iron oxides, lime, magnesia, potash and soda.