Population Sources of Population Data Population Distribution in E. Africa In 2005 was estimated to be 90m people spread out thus: Factors Influencing Population Distribution in East Africa Distribution of population on the earth‟s surface isn‟t uniform due to the
Industry Industry – Any form of economic activity through which people produce goods and services for their consumption.Industrialisation– Process through which a country establishes manufacturing industries. A country is referred to as industrialised when production of manufactured goods is the main
Land Reclamation Is the process of converting wasteland into farm land for growing of crops and keeping of animals while land rehabilitation is the process of restoring land to its former productive state.Major Importance of Land Reclamation1. Intensify food production
Introduction to Radioactivity – Radioactivity was discovered by Henri Becquerel in 1869. In 1898, Marie and Pierre Curie succeeded in chemically isolating two radioactive elements, Polonium (z=84) and Radium (z=88).Radioactivity or radioactive decay is the spontaneous disintegration of unstable nuclides to form stable ones with
Introduction to Photoelectric Effect – Photoelectric effect was discovered by Heinrich Hertzin 1887.Photoelectric effect is a phenomenon in which electrons are emitted from the surface of a substance when certain electromagnetic radiation falls on it.– Metal surfaces require ultra-violet radiation
What are X-rays? – X-rays were discovered by a German scientist namedRoentgen in 1985.– They can pass through most substances including soft tissues of the body but not through bones and most metals.– They were named X-rays meaning ‘unknown rays’.
What is a Cathode Ray? These are streams of electrons emitted at the cathode of an evacuated tube containing an anode and a cathode. Production of Cathode Rays They are produced by a set up called a discharge tube where a high
Introduction to Main Electricity – Mains electricity comes from a power station and its current is the alternating current which can either be stepped up or down by a transformer. A.c is produced when a conductor is rotated in a magnetic
Introduction to Electromagnetic Induction Electromagnetism is the effect resulting from the interaction between an electric current and a magnetic field. This effect brings about induced electromagnetic force (e.m.f) and the resulting current is called induced current. Experiments on electromagnetic induction Consider
Introduction to Electromagnetic Spectrum Electromagnetic spectrum is a continuum of all electromagnetic waves arranged according to frequency and wavelength. It includes visible light, ultra-violet rays, microwaves, X-rays, radio waves and gamma rays. Electromagnetic waves are produced when electrically charged particles oscillate
Translation is a process by which ideas that are written in one language ar...
Are the abilities that allow you to write effectively and concisely. A competent...
Reading is the process of going through written information or piece of wor...
What is Speaking? SPEAKING SKILLS: Speaking is simply the act of talking wh...
Listening is ability to accurately receive and interpret messages in the communi...
This is the field or branch of morphology which studies different principles or ...
Language is a symbol system based on pure or arbitrary conventions…...
Ecology is the study of the interactions between living things, such as humans, ...
EVOLUTION Evolution is a change in the genetic composition of a population...
Genetics is the study of heredity and variationHeredity- is the passage of chara...