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Under: [23/07, 08:51] CODEDBOSS: NECO 2021 NECO GEOGRAPHY
(2a)
(i) Great Circles: is any circle that divides the globe into two equal halves or hemisphere. The equator is a great circle and all lines of longitude including the greenwich meridian line. Great Circles are equal in length. The shortest distance between two points on a spherical surface lies along the circle. Examples are The Equator(0°latitude), The Greenwich Meridian(0°longitude).
(ii) International Date Line: This os an imaginary line running North-South through the Pacific Ocean. The line is zig-zag at some places to avoid some island groups thereby removing the confusion of dividing one island into different dates. Whenever the international Date Line is crossed, a whole day is either lost or gained.
(iii) Time Zone: The world split into 24 time zones and each zone covers 15° of longitude or one hour. The difference between the two successive zones is one hour. All places located on the same time zone have the same time For every 15° movement across the Longitude west of Greenwich Mean Time, an hour is always lost while to the east an hour is gained.
(iv) Prime Meridian:
Coming……..
(2b)
Tabulate
Under Parallel
(i)
(ii)
(iii)
(iv)
Under Meridians
(i)
(ii)
(iii)
(iv)
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(3a)
(i) Mechanically Formed Sedimentary Rocks: These are rocks which are formed as a result of the action of water wind and ice. The following rocks are the results of the action of water which include clays, gravel and aluminum. Those that result from the action of ice are moraine, boulder and gravel.
(ii) Organically Formed Sedimentary Rocks: These are rocks which are formed from the remains of plants and animals. Some of the notable rocks formed by the remains of animals are chalk and corals. Those that result from plants include peat and lignite.
(iii) Chemically Formed Sedimentary Rocks: These are rocks which results from chemical composition. The major rocks formed include Borax, gypsium.
(3b)
(i) These rocks are resistance to erosion.
(ii) They occur in strata or layers.
(iii) They contain fossils of plants and animals.
(iv) They are non-crystalline in nature
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(4a)
[23/07, 08:51] CODEDBOSS: (4c)
(i) A-Climate
- (Tropical Rainy Climate)
In this zone, temperature is about 21°C and above. – It has heavy rainfall throughout the year. The climate is moist and hot - In the A-Climate, there are three sub-groups, namely Af, Am and Aw.
(ii) AW-Climate
- (The Tropical Grassland) (Savanna)
- This climatic group can be located 5° – 25° North and between 5° – 25° South of the Equator.
The main areas located within this zone are:
(1) West Africa and parts of Central and Eastern Africa.
(2) Central America and parts of North-West of South America. - Rainfall only occurs in summer.
- Rainfall is seasonal and convectional in nature.
(iii) C-Climate
- (Warm Temperate Rainy Climate).
- There are types of sub groups of the warm temperate rainy climate
(1) The Cf Climate: This type of climate is often referred to as the Mild Humid Climate. In this zone, there is no dry season with any month having less than 30mm of rainfall.
(2) The Cw Climate: Heavy Rainfall in Summer, Dryness in winter.
(3) The Cs Climate: Has heavy rainfall in winter, it has dryness in summer.
(iv) E-Climate
- (Polar/Ice Climate)
- In the E – Climate, two distinct sub-groups can be identified namely:
(1) The ET Climate: This type of climate belt is often referred to as TUNDRA Climate. This zone has an average temperature of warmest months less than 10°C but greater than 0°C.
(2) The EF Climate: This zone is also referred to as the zone of continuous frost climate. It has average temperature of all months less than 0°C. It also has ice caps.
[23/07, 08:51] CODEDBOSS: (5a) A Karst Topography also know as Limestone Region has no surface water, since the the sudden disappearance of springs underground to form sub-terranean streams.
(5b)
(i) Absence of surface Drainage: Due to permeability of the region, most surface water flow a short distance and disappear.
(ii) Solubility: Limestone is insoluble but due to the action of rainwater in the which carbondioxode dissolves to form weak acid, which then makes the limestone to become soluble.
(iii) Presence of Dry Surface Valleys: Due to the easy penetration of water into karst region, all the valleys often remain dry.
(5c)
Diagram Below Loading….
(i) Clints: Clints are surface features and isolated rectangular blocks which exist between joints or grikes.
(ii) Doline: This is formed when a number of several sink holes join together to form a large depression.
(iii) Grikes: This are surfaces features in limestone regions. They are formed as a result of gradual widening of the joints by solution to form limestone pavement.
[23/07, 08:51] CODEDBOSS: Use this very much accurate
Geography-Obj!
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Completed!.
