It extends from Earth’s surface to an average height of
about 12 km (7.5 mi; 39,000 ft)
, although this altitude varies from about 9 km (5.6 mi; 30,000 ft) at the geographic poles to 17 km (11 mi; 56,000 ft) at the Equator, with some variation due to weather.
How high is the Earth’s atmosphere?
Earth’s atmosphere stretches from the surface of the planet up to as
far as 10,000 kilometers (6,214 miles)
above. After that, the atmosphere blends into space.
What is the highest altitude of earth’s atmosphere?
Located between about 700 and 10,000 kilometers (440 and 6,200 miles) above Earth’s surface,
the exosphere
is the highest layer of Earth’s atmosphere and, at its top, merges with the solar wind.
What altitude does the atmosphere start?
The troposphere starts at the Earth’s surface and extends
8 to 14.5 kilometers high
(5 to 9 miles). This part of the atmosphere is the most dense. Almost all weather is in this region. The stratosphere starts just above the troposphere and extends to 50 kilometers (31 miles) high.
At what height does the atmosphere end?
The final layer of the atmosphere, the enormous exosphere, continues until
around 6,700 miles (10,000 km)
above the surface of our planet (and some say even further). At that point, the moon is still hundreds of thousands of miles away.
Which is the hottest layer of atmosphere?
The thermosphere
is often considered the “hot layer” because it contains the warmest temperatures in the atmosphere.
What are the 7 layers of atmosphere?
- The Troposphere. This is the lowest part of the atmosphere – the part we live in. …
- The Stratosphere. This extends upwards from the tropopause to about 50 km. …
- The Mesosphere. The region above the stratosphere is called the mesosphere. …
- The Thermosphere and Ionosphere. …
- The Exosphere. …
- The Magnetosphere.
What are the 7 layers of Earth?
If we subdivide the Earth based on rheology, we see the
lithosphere, asthenosphere, mesosphere, outer core, and inner core
. However, if we differentiate the layers based on chemical variations, we lump the layers into crust, mantle, outer core, and inner core.
Which gas is most abundant in Earth’s atmosphere?
The most abundant naturally occurring gas is
Nitrogen (N
2
)
, which makes up about 78% of air. Oxygen (O
2
) is the second most abundant gas at about 21%. The inert gas Argon (Ar) is the third most abundant gas at . 93%.
Where does space end?
Interplanetary space extends to the heliopause, whereupon the solar wind gives way to the winds of the interstellar medium. Interstellar space then continues to the edges of the galaxy, where it fades into
the intergalactic void
.
How far is space from Earth in feet?
International law does not define the edge of space, or the limit of national airspace. The FAI defines the Kármán line as space beginning 100 kilometres (54 nautical miles; 62 miles;
330,000 feet
) above Earth’s mean sea level.
Where does space begin?
The U.S. military, the Federal Aviation Administration, and NASA all set the boundary of
space at 50 miles (80 km) above ground
. The Fédération Aéronautique Internationale (FAI), an international record-keeping body for aeronautics, defines the Kármán line as the space boundary, at an altitude of 62 miles (100 km).
Where does space start and end?
In the 1900s, Hungarian physicist Theodore von Kármán determined the boundary to be around 50 miles up, or roughly 80 kilometers above sea level. Today, though, the Kármán line is set at what NOAA calls “an imaginary boundary” that’s
62 miles up
, or roughly a hundred kilometers above sea level.
What is the coldest layer of the atmosphere?
Mesosphere
, coldest layer of Earth’s atmosphere.
How far is space from Earth?
Experts have suggested the actual boundary between Earth and space lies anywhere from a mere 18.5 miles (30km) above the surface to
more than a million miles (1.6 million km) away
.
What is 80% of the atmosphere?
Troposphere
. The troposphere is the atmospheric layer closest to the planet and contains the largest percentage (around 80%) of the mass of the total atmosphere. Temperature and water vapor content in the troposphere decrease rapidly with altitude.
