Basic Science

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:

Energy for working. Energy is a key factor in national development. For instance, electrical energy is needed to do a lot of things. Poor management of the energy resources in a nation might cause it to remain in a state of underdevelopment. The three main societal needs of energy are mechanical work, heat supply and

Meaning of renewable and non-renewable energy Renewable energy is the energy resources that can be replaced as they are used up. Non-renewable energy is the energy resources that cannot be replenished as they are used up. Examples of renewable and non-renewable energy Examples of renewable sources of energy are: Sun Wind Water Biomass Sea (tides)

Counselling and Testing Places to go for counselling and medical tests are: School guidance and counsellor Health centres Specialized institutions Youth centre Adolescent-focused NGOs Care and support The support and care that can be given to people living with HIV/AIDS are: Compassion and understanding which create a sense of love and build self-confidence Emotional support

HIV means Human Immunodeficiency Virus while AIDS means Acquired Immune Deficiency Syndrome. HIV/AIDS is a deadly disease which has no cure yet. The virus, HIV is the cause of AIDS. This virus attacks the body’s immune defence system and breaks it down. Differences between HIV and AIDS HIV is the virus that causes AIDS. A

Sexually transmitted infections (diseases) are infections that can be spread from one person to another through sexual intercourse with an infected person. Examples, Causative agents and symptoms of Sexually Transmitted Infections (STIs) EXAMPLES OF STIs CAUSATIVE AGENT TRANSMISSION SYMPTOM PREVENTION 1 Gonorrhea Bacterium (Neisseria gonorrhoea) – Sexual intercourse – At delivery through infected mother to

Effects of air pollution.
(1) It can lead to respiratory diseases (when smoke, soot and dust is inhaled)
(2) Smog can reduce visibility and cause respiratory diseases
(3) High concentration of carbon (ii) oxide can cause brain damage
(4) It can cause cancer

Pollution is the contamination of our environment with dirty, poisonous and dangerous or hazardous substances. It is also defined as the release of waste products or materials into the environment that is harmful to life. These dirty, poisonous and dangerous or hazardous substances are called pollutants. Types of pollution Air pollution Water pollution Soil pollution

Reproduction is the ability of living things to produce young ones like them. Reproduction is one of the characteristics of living things which is for the continuation of life. There are two types of reproduction. Asexual reproduction Sexual reproduction Asexual reproduction – this kind of reproduction involves a single parent to produce young ones. In

The kinetic theory of matter explains the behavior of matter in terms of the motion of its particles. According to this theory, matter is composed of tiny particles (atoms, molecules, or ions) that are constantly in motion. Changes in states of matter, such as solid to liquid or liquid to gas, can be explained using

Melting When a solid is heated, the particles acquire more kinetic energy and vibrate more vigorously. Eventually, at a certain temperature called the melting point of the solid, the force of the vibrations overcome the binding forces and solid structure collapses. The particles are no longer in fixed positions, but free to move. At this

Kinetic molecular theory is useful in describing the properties of solids, liquids and gases at the molecular level.  Kinetic theory of matter assumes that matter is made up of tiny particles such as atoms, molecules and ions that are continually moving and therefore possess kinetic energy. The more heat you give these particles, the faster

Kinetic energy is a form of energy that an object possesses due to its motion. It is defined as the energy an object has because of its mass and velocity. The formula for calculating kinetic energy is: Kinetic Energy Kinetic Energy (KE) = 0.5 * mass * velocity^2 where: – KE is the kinetic energy

Life Span continuum refers to series of similar events that takes place throughout the length of time a person is likely to live.

Communication Techniques Communication is the process of giving, receiving and understanding messages. It involves exchanging ideas, understanding, listening, expressing oneself, talking and using body language, facial expression and a host of other behaviours. Types of communication: 1.Verbal Communication; This is one of the most common ways of c communication which involves sending or receiving information

When an object is dropped from above the ground, work is done as the object is pulled to the ground. As the object is falling and work is done, the potential energy of the body is changed to kinetic energy. In principle, the quantity of potential energy stored in a body is always equal to

Potential Energy Potential energy is the type of energy possessed by a body due to its position. A stone on the ground does not have energy so long as it is lying on the ground. The stone cannot be seen doing any work. However, if a stone is on a table and it is placed