Cyril: What's the weather like where you are John?
John: Well Cyril first you have to understand that
Weather is the state of the
atmosphere, to the degree that it is hot or cold, wet or dry, calm or stormy, clear or cloudy.
[1] Most weather phenomena occur in the
troposphere,
[2][3] just below the
stratosphere. Weather generally refers to day-to-day temperature and
precipitation activity, whereas
climate is the term for the average atmospheric conditions over longer periods of time.
[4] When used without qualification, "weather", is understood to mean the weather of
Earth.
Weather is driven by air pressure (temperature and moisture) differences between one place and another. These pressure and temperature differences can occur due to the sun angle at any particular spot, which varies by
latitude from the
tropics. The strong temperature contrast between polar and tropical air gives rise to the
jet stream. Weather systems in the
mid-latitudes, such as
extratropical cyclones, are caused by instabilities of the jet stream flow. Because the Earth's
axis is tilted relative to its orbital plane,
sunlight is incident at different angles at different times of the year. On Earth's surface, temperatures usually range ±40 °C (−40 °F to 100 °F) annually. Over thousands of years, changes in Earth's
orbit affect the amount and distribution of
solar energy received by the Earth and influence long-term climate and global
climate change.
Cyril: Thanks John where are you exactly?
John: An interesting question Cyril but what you must understand is that
Geography (from
Greek γεωγραφία,
geographia, lit. "earth description"
[1]) is the branch of
knowledge that studies the lands, the features, the inhabitants, and the phenomena of the
Earth.
[2] A literal translation would be "to describe or write about the Earth". The first person to use the word "geography" was
Eratosthenes (276–194 BC).
[3] Four historical traditions in geographical research are
spatial analysis of the natural and the human phenomena (geography as the study of distribution),
area studies (places and regions), study of the man-land relationship, and research in the
Earth sciences.
[4] Nonetheless, modern geography is an all-encompassing discipline that foremost seeks to understand the Earth and all of its human and natural complexities - not merely where objects are, but how they have changed and come to be. Geography has been called "the world discipline" and "the bridge between the human and the
physical science". Geography is divided into two main branches:
human geography and
physical geography/
Cyril: Whatever.
. Once I get to a proper keyboard I'll expand.
