Monday 7 November 2016

Neco Gce 2016 Geography And Objective Practical Answers – Nov/Dec Expo

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2a)Revolution is where the Earth travels, or revolves, around the Sun in a roughly circular path
Each revolution takes the Earth around one complete orbit of the Sun, back to the same point a second time, and is called a year .
It takes the Earth 365 days to complete it's
revolution around the sun.

2b)-Rotation refers to the Earth's spin around its internal axis, while revolution refers to the Earth's orbital motion around the sun.
-The
Earth rotates on its axis once every 24 hours and revolves around the sun once every 365.25 days.
-Rotation of the earth causes day and night while Revolution causes seasons
-Rotation causes dawn and twilight while Revolution causes Tides,waves
2c)-Rotation of the earth causes day and night
-Rotation of the earth causes sunrise and sunset
-Rotation of the earth causes dawn and twilight
-Rotation of the earth causes different time zone in different places
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5a)Volcanicity is the process where molten magma or lava forces its way out from the earths
crust unto the earths surface.

5bi)Dyke:-this is sheet of of rock that is formed in the fracture in the pre - existing rock. Dyke form when
a mass of magma cuts across the bedding planes
and forms a wall like structure. Example of dyke is
one that is found in Jos plateau in Nigeria this has
been exposed to the surface through erosion.

ii)Sill:-this is formed when a sheet of magma lies along the bedding planes of the earth's surface. A
sill is therefore a horizontal sheet of rock that
solidifies from magma that has been injected
concordantly between bedding planes; they may
be of any thickness and extend for many square
of kilometers. Example of sill is a great Whill sill in great Britain.

iii)Batholith:-is large body of intrusive igneous rock believed to have been crystallized at the
considerable depth below the earth's surface..
They are the largest type of pluton. Example of
batholith is Idaho batholith which cover surface
area of over 15500 kilometer square.

iv)Lopoliths these are saucer - shaped features formed beneath the earth's surface through
magma intrusion. Lopolith forms great shallow
basin when magma solidifies within the crust a
good example is bush veld igneous complex of 
south Africa which is composed of both granite
and basic rock.
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8a) Also known as geospatial data or
geographic information it is the data or information that identifies the
geographic location of features and boundaries on Earth, such as natural or constructed features, oceans, and more. Spatial data is usually stored as coordinates and topology, and is data that can be mapped.


8bVector Spatial Data Types
Vector data is not made up of a grid of pixels. Instead, vector graphics are comprised of vertices and paths .
The three basic symbol types for vector data are points, lines and polygons (areas). Since the dawn of time, maps have been using symbols to represent real-world features. In GIS terminology, real-world features are called spatial entities.
The cartographer decides how much data needs to be generalized in a map. This depends on scale and how much detail will be displayed in the map. The decision to choose vector points, lines or polygons is governed by the cartographer and scale of the map.
Points.
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3b)-It serves as a centre for tourist attraction
-it leads to the formation of relief rainfall
-it serves as a source of numerals
-it also serve as sources of rivers which creates employment e.g.fishermen
=====ENJOY IT=====

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