Insolation The only source of energy for the earth’s atmosphere is the sun which has a surface...
This is a type of nutrition in which one organism obtains food from another organism and during...
Landforms of glaciated lowlands are mainly depositional in nature, brought about by both valley glacier and continental...
Glaciation generally gives rise to erosional features in the highlands and depositional features on the lowlands, though...
During the earth’s history, there have been many changes in the pattern of climatic regions. The most...
Mouth The mouth has a horny covered tongue to facilitate swallowing of food substances to the oesophagus....
Mating and laying of eggs The adult male and female mate. The female lays fertilized eggs on...
1) Temperatures: Coastlands with warm currents offshore tend to have mild climates for their latitudes. Coastlands with...
The Circulation of the Pacific Ocean The pattern of circulation in the Pacific is similar to that...
Let us now study more closely the circulation of ocean currents in the Atlantic Ocean. We shall...
Ocean currents are large masses of surface water that circulate in regular patterns around the oceans, as...
Like land masses, ocean water varies in temperature from place to place both at the surface and...
Within the nucleus of non-dividing cells are strands or string-like structures known as chromosomes. As the cell...
Almost every known chemical element can be found in varying proportions in the oceans whose most characteristic...
The ocean basins are in many ways similar to the land surface. There are submarine ridges, plateaux,...
The oceans occupy more than 70 per cent or 364 million sq km (140 million square miles)...
Aim: To demonstrate the effects of mineral deficiency on plants. Material required: Nine wide-mouthed glass jars,...
Movement is the ability of living organisms to move from one place to another. Reasons for movement...
Having examined the various factors which contribute to the location of industrial districts, we shall now look...
Dentition refers to the number, arrangement and conformation of teeth in an organism. Types of Dentition...
Unicellular Organisms There are no special respiratory organs in unicellular and aquatic organisms such as Amoeba and...
Wind erosion, transportation and deposition are most effective and widespread in desert regions, but few deserts in...
Materials that have been eroded and transported by winds must come to rest somewhere. The finest dust...
Organisms exhibit different feeding habits. These are: Filter Feeding Filter feeders which are also called microphagous feeders...
There are four types of excretory organs used by mammals. These are: lungs, skin, liver and kidneys....
In the combined processes of abrasion, deflation and attrition, a wealth of characteristic desert landforms emerge. 1)...
Arid landforms are as a result of many combined factors, one reacting upon the other. Insufficient rainfall,...
Social animals are those in which individuals of the same species live together cooperatively in organized communities...
Man’s universal demand for food, clothing, shelter and other comforts of life has prompted the creation of...
Behaviour is everything an organisms does in response to changes in its environment. It is basically adaptive,...
About a fifth of the world’s land is made up of deserts, some rocky, others stony and...
Adaptive colouration is the possession by an organisms, of a colour which enable it to catch its...
Concealment: This is the willful act of holding back information that may be pertinent to the issuance...
MEANING OF REINSURANCE This refers to an arrangement whereby an insurer, having accepted risk beyond his financial...
Structural adaptations are special modification of structures which help organisms to survive better in their various environment....
Adaptation is defined as the possession of special features or structure which improves the changes of an...
Nature, properties and uses Iron is the commonest, cheapest and most versatile of all metals. It is,...
Of the power sources, electricity is the cheapest. It is not exhaustible like coal or petroleum but...
Life assurance deals with insurance of human life either in death, retirement, disability, etc. It has to...
BUSINESS INTERRUPTION INSURANCE This type of insurance is designed to indemnify an organisation for the loss of...
AVIATION INSURANCE This is connected with various types of aircraft: airplane, gliders, helicopters, jet, etc. Aviation insurance...
Petroleum is mineral oil, organic in origin, and occurs in the pore spaces of sedimentary rocks. It...
Structure of the blood The blood is a tissue in a fluid form. An adult man has...
CREDIT INSURANCE Credit is a system of buying and selling without immediate payment being made. It is...
Coal, comprising mainly carbon of vegetative origin, is one of the oldest forms of power. It provided...
Minerals are natural, chemical substances which make up the rocks of the earth’s crust. They have certain...
Care of the eyes Use good light when reading or doing any fine work such as sewing....
The different parts of the human body are very important for healthy life. These parts require good...
MONEY INSURANCE The term ‘money’ here means cash, bank and currency notes, cheques, postal and money orders,...
FIRE INSURANCE Fire insurance is an essential class of insurance to aid the growth of stability of...
