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What is the significance of the 1482 Ptolemy map? - 🧠 ANSWER ✔✔It was
the first map to use grid lines (a coordinate system using latitude and
longitude to define positions)
What is latitude? - 🧠 ANSWER ✔✔Angle that describes the north-south
position.
Parallel - 🧠 ANSWER ✔✔Circle connecting all locations with a given
latitude
Pole - 🧠 ANSWER ✔✔Points where the Earth's axis of rotation meets its
surface
There are North, South poles
,Equator - 🧠 ANSWER ✔✔Intersection of the Earth's surface with the plane
perpendicular to the axis of rotation and midway between the poles. The
equator is the biggest parallel
Arctic Circle - 🧠 ANSWER ✔✔Southernmost latitude in the Northern
Hemisphere where the Sun can remain continuously above or below the
horizon for 24h.
Antarctic Circle - 🧠 ANSWER ✔✔Northernmost latitude in the Southern
Hemisphere where the sun can remain continuously above or below the
horizon for 24h.
Tropic of Cancer + How does it change seasons depending on where Earth
is tilted + Value - 🧠 ANSWER ✔✔Northernmost circle of latitude where the
Sun can be directly overhead
When the top of the Earth is tilted towards the sun, it is summer in the
northern hemisphere. Since the southern hemisphere is tilted away from
the sun, it's winter there
Tropic of Capricorn + Value - 🧠 ANSWER ✔✔Southernmost circle of
latitude where the Sun can be directly overhead
,66.5S
Longitude - 🧠 ANSWER ✔✔Angle that describes the east-west position, no
value for Longitude
Meridian - 🧠 ANSWER ✔✔Half of an imaginary great circle, terminating at
the North Pole and the South Poles, connecting points of equal longitude
Prime Meridian - 🧠 ANSWER ✔✔Origin of the measures of Longitude (zero
degrees of longitude)
What can be said about the four models of the Earth? Are they correct?
How do they differ? - 🧠 ANSWER ✔✔All are wrong models of the Earth but
have varying degrees of correctness and incorrectness. Varying in
complexity, accuracy and applications
Geoid model of the Earth - 🧠 ANSWER ✔✔- Most accurate model of the
Earth
- Physical approximation of the figure of the Earth
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, - Shape of the surface of calmed oceans, in the absence of other
influences such as winds and tides
- Computed using complex physical models and gravity readings of Earth's
surface
- Used to measure surface elevations with a high degree of accuracy
Ellipsoid model of the Earth - 🧠 ANSWER ✔✔- Mathematical approximation
of the shape of the Earth
- The Earth is flattened at the poles and bulges at the equator due to its
revolution; ellipsoid geodesy accounts for this. It is suitable for direct
mathematical computations
- Defined by two numbers: semi-major and semi-minor axis
-AX=B