Answer:
In the Northern Hemisphere the autumnal equinox falls about September 22 or 23, as the Sun crosses the celestial equator going south.
Explanation:
In the Southern Hemisphere the equinox occurs on March 20 or 21, when the Sun moves north across the celestial equator.
There is no doubt Antarctica is an incredible tourist destination. It is a magnificent and largely uninhabited wilderness with majestic mountains, glaciers, icebergs and abundant wildlife. Its remoteness, inaccessibility and severe climate add an element of adventure to a visit to Antarctica.
Visitor numbers have increased rapidly over the last few decades. During the 1998-99 summer season, over 10,000 tourists visited Antarctica compared with less than 2,000 19 years ago. Tours are organised by private companies and people from all over the world make the journey to see the icy continent.
The trend of increasing visitor numbers has led the Antarctic Treaty countries to establish guidelines and regulations to minimise the impact of these visitors on this remarkable environment.
The atmosphere layer closest to the earth is referred to as the troposphere. Beyond the troposphere are the stratosphere, the ozone layer, the mesosphere, and the thermosphere. The atmosphere is made up of 78% nitrogen, 21% oxygen, and smaller amounts of argon, carbon dioxide, helium, and neon.
By weakening and fracturing rock, weathering processes release nutrients and improve subsurface permeability. It is helpful to limit the physical attributes of materials produced by weathering inside the crucial zone in order to better understand these processes.
The permeability, strength, and seismic anisotropy of foliated rocks can be measured geophysically, whereas the first two have effects on hydrology and geomorphology. Characterizing weathering-dependent changes in rock fabric with depth may have a variety of implications because each of these types of anisotropy is connected to rock fabric.
The key points are:
- In the critical zone, seismic surveys of weathered material reveal seismic anisotropy magnitudes that can reach 36% and that change with depth.
- The strike of foliation and fracture planes found in bedrock coincides with the fast direction of wave propagation in weathered materials.
- As bedrock is exhumed toward the surface, in-situ weathering processes probably intensify the anisotropy already existing in the rock.
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Answer:
The presence of an atmosphere, temperature, and distance from the Sun do not affect a planet's gravity. Are the objects in the solar system still or are they in motion? The Sun's gravity pulls the planets in orbit around it, and some planets pull moons in orbit around them.
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Explanation:
