WEATHER FORECASTING
Prediction of the conditions of the atmosphere for a given place for a certain period. Methods of Weather Forecasting Traditional Methods – Prediction of weather based on traditional beliefs and… Read More »WEATHER FORECASTING
Ajayi
ATMOSPHERIC PRESSURE
The force exerted by gases in the atmosphere on some area or body on the earths surface. Measured using barometers of three types namely mercury, aneroid and Fortin Barometers How… Read More »ATMOSPHERIC PRESSURE
WIND
Direction Wind direction is determined using wind vane. How It Works As the wind blows the arrow swings. The arrow points in the opposite direction of the wind flow. The… Read More »WIND
HUMIDITY
Humidity is the condition of atmosphere with reference to its water content. It’s measured with hygrometer or psychrometer which consists of wet and dry bulb thermometers kept in Stevenson screen.… Read More »HUMIDITY
SUNSHINE
Duration of sunshine is measured using Campbell stokes sunshine recorder. How It Works Spherical lens focuses light on sensitized paper. The paper burns when the sun is shining. The total… Read More »SUNSHINE
RAINFALL
Rain gauge is the instrument used to measure the amount of rainfall in a day. It should be made of impermeable material which can’t absorb water. How It’s Used/Works It’s… Read More »RAINFALL
TEMPERATURE
Degree of hotness of an object or a place. It’s measured using 3 types of thermometers namely: Maximum thermometer Minimum thermometer Six’s thermometer Maximum Thermometer It’s used to measure… Read More »TEMPERATURE
THE STEVENSON SCREEN
A white wooden box mounted on 4 legs used to house thermometers and hygrometers. The instruments which are found in it are: Maximum thermometer Minimum thermometer Six’s thermometer hygrometer-wet bulb… Read More »THE STEVENSON SCREEN
THE WEATHER
Daily atmospheric conditions of a place at a particular time. Elements of Weather Temperature Humidity precipitation Precipitation Atmospheric pressure Wind Sunshine Cloud cover A Weather Station -A place where… Read More »THE WEATHER
EXTERNAL STRUCTURE OF THE EARTH
a) The Atmosphere Layer of gases surrounding the earth. The earth revolves with it because it’s held onto it by gravity It’s about 330km thick. Composition of the Atmosphere… Read More »EXTERNAL STRUCTURE OF THE EARTH
THE STRUCTURE OF THE EARTH (Internal Structure)
Internal Structure of the Earth The evidence used to study the earth’s interior are mining drilling quarrying/excavation Crust/Lithosphere Outermost layer of the earth Made of soils and other loose deposits… Read More »THE STRUCTURE OF THE EARTH (Internal Structure)
REVOLUTION OF THE EARTH
Movement of the earth in its orbit around the sun. It’s in anticlockwise direction. The orbit of the earth’s revolution is elliptical. Takes 365 ¼ days in a year or… Read More »REVOLUTION OF THE EARTH
THE ORIGIN OF THE EARTH
A star with a greater gravitational pull passed near the sun. It attracted large quantities of gaseous materials from the sun. The materials split, cooled and condensed. Heavier materials collected… Read More »THE ORIGIN OF THE EARTH
CALCULATION OF LOCAL TIME
The time recorded in places within the same longitude. A longitude is an imaginary line running from N to S which shows how far E or W a place is… Read More »CALCULATION OF LOCAL TIME
NATURAL SATELLITES
Any natural heavenly body that orbits around a planet e.g. moon for earth, tritan for Saturn and triton for Neptune. Asteroids/Planetoids Also called minor planets. Are small fragments of rocks… Read More »NATURAL SATELLITES
COMPOSITION OF THE SOLAR SYSTEM
The Sun It’s the centre of the universe. Characteristics of Sun It’s a star. A star is a heavenly possessing its own light which it transmits. Nebula/galaxy is a cluster… Read More »COMPOSITION OF THE SOLAR SYSTEM
THE EARTH AND THE SOLAR SYSTEM
THE EARTH AND THE SOLAR SYSTEM
Solar system is the group of heavenly bodies comprising the sun and the nine planets.
The origin of the Solar System
Theories
A theory is a set of reasoned ideas intended to explain facts or events
Passing Star Theory
A star with a greater gravitational pull passed near the sun
It attracted large quantities of gaseous materials from the sun
The materials split, cooled and condensed to form planets
The planets were set in orbit by the passing star
IMPORTANCE OF STUDYING GEOGRAPHY
IMPORTANCE OF STUDYING GEOGRAPHY Facilitates good relationship among nations by studying geography of other regions of the world. it’s a career subject in that it enables one to go for… Read More »IMPORTANCE OF STUDYING GEOGRAPHY
INTRODUCTION TO GEOGRAPHY
The Meaning of Geography Scientific study of the earth as a home of man. Study of interrelationship on natural and human phenomena on the earth’s surface. Environment The surroundings All… Read More »INTRODUCTION TO GEOGRAPHY
MINING IN AFRICA (GOLD, PETROLEUM AND COPPER)
MINING IN AFRICA (GOLD, PETROLEUM AND COPPER) Mining is defined as the extraction and processing of mineral resources into finished products. Mining of Gold South Africa is the largest producer… Read More »MINING IN AFRICA (GOLD, PETROLEUM AND COPPER)