JSS 3 Basic Science (1st, 2nd & 3rd Term)

A machine  is defined as any arrangement that enables work to be done easily. Types of machine There are different types of simple machines ;  lever, pulley,  wheel and axle,  inclined plane,  screw and jack  and hydraulic press .A machine is made of three important parts namely; pivot or fulcrum, effort and load. The effort […]

Radioactivity is the spontaneous disintegration of the nucleus of an atom of an element. Radioactivity involves nucleus reactions. A chemical reaction involves the movement of an element in its nucleus, and the force holding the nucleus becomes weaker. Such an atom becomes unstable, it may break up on its own accord with the emission of

ABORTION: Is defined as the deliberate termination of human pregnancy. It ends the pregnancy by removing the foetus and embryos before it can survive outside the uterus.  TYPES OF ABORTION INDUCED ABORTION: This is the intentional decision of a woman to end the pregnancy through surgery or by taking medicine. 2. SPONTANEOUS / MISCARRIAGE ABORTION:

Skill acquisition is a special  ability impacted on somebody as a result of training  to do something well. REASONS FOR SKILL  OF ACQUISITION (1)     To get employment (ii) To be self employed because they don’t want to be under anybody (iii)     For decision making Iv   For risk taking V   For managing emergency situation Vi  For

Electrical energy are needed in industries ,officers and home for carrying out numerous essential operation for instance blender at home , television, iron and fridge all make use of electrical energy to operate . Electric current is the flow or electron from one point to another in a  circuit in a metallic conductor called wires

Magnetism is a fundamental force of nature that manifests itself in various ways. It is the force that causes certain objects to attract or repel each other. Magnetism is closely related to electricity and is a result of the movement of charged particles, such as electrons. Here are some key points about magnetism: 1. Magnetic

Sound is a form of energy and transfer in form of wave to the listener through a medium by vibration Sound is transmitted through a medium in the form of vibration or wave reach the human ear , the waves as sound  Sound are classified into two classes (i)  musical sound  (ii) noise Musical sounds

Energy is the capacity to do work, Light is a form of energy because it can do work. Light energy travels on a straight line, the phenomenon of light travelling on a straight line is called rectilinear propagation of light. The pinhole camera operates on this principle. Other phenomena that show that the light travel

Nigeria is known to have abundant solid mineral resources spread across different locations within the country. Here are some of the key solid minerals found in Nigeria and their respective locations: 1. Coal Nigeria has significant coal deposits, primarily located in the southeastern and north-central parts of the country. Major coal mines are situated in

Minerals are naturally occurring substances in the soil. Such minerals are natural endowments to particular communities. The mineral resources may exist in solid, liquid or gaseous forms. Examples of mineral resources are petroleum, limestone, gold, coal etc. Examples of solid minerals in Nigeria are gold, limestone, coal, tin ore, columbite, iron ore, diamond etc. These

Plant and animal resources play a crucial role in the economy, providing various goods and services that contribute to human well-being and economic development. Here are some key economic aspects of plant and animal resources: 1. Food Production Plants and animals are the primary sources of food for human consumption. Agriculture, including crop cultivation and

The source of resources from living things comes from plants and animals. The resources from plant sources include cash crops and food crops, dyes, and drugs while resources from animals include hide and skin, and dairy products. Plants’ resources are grown in the garden and farms for food, commercial purposes, and aesthetic values. Resources from

Description-Atmosphere is the region of air above the earth surface. The principal layers of the atmosphere according to temperature of hotness are thermosphere, mesosphere, stratosphere and troposphere. The ozone layer is located in the stratosphere of the atmosphere where it forms a protective layer shielding life on earth from the sun’s harmful ultra-violet radiation. The

Desertification is the process by which a previously biologically productive land becomes progressively dried till it eventually becomes a desert. Or Desertification is the extension or encroachment of desert into habitable land. The geographical zones near and around  the desert are highly prone to this environmental hazard.Man”s activities have contributed environmental degradation such as exposing

Deforestation is defined as the clearing of forest wood for farming or purposes without immediate replanting. This act of cutting down trees indiscriminately by the activities of man is encouraged by the following factors; -Bush burning -Building of schools, houses etc. -felling of trees for firewood -Construction of roads and bridges.   Reasons for Deforestation

Flood is defined as an overflow of water that submerges land which is usually dry. Flooding occurs when a part of the soil or land is submerged under water. Some part of the land are prone to flooding, this is due to the soil structure Types of Flooding Flash floods- This occurs within a very

Bush burning is the act of setting forest, weed and grasses on fire deliberately either with a purpose or not. Practices That Influence Bush Burning -Some poor agricultural practices such as shift cultivation -Hunting for animals -By using fire to clear land for agricultural purposes -Construction of roads and felling of trees. -Grazing purpose by

Erosion is the washing away or wearing of the top soil and sub-soil from land either by water or wind. Process of Soil Erosion -Detachment is when the top soil is actually detached from the rest of the soil. -Movement is when the top soil is transported to another area. -Deposition is where the top