Find complete Basic Science lesson notes for Junior Secondary School students, from JSS1 to JSS3. These notes are carefully crafted to align with the Nigerian school syllabus, making learning easier and more organized.
Each topic is explained simply and engagingly to help students understand key scientific concepts, prepare for examinations, and build a strong foundation for future studies.
Teachers can also use these notes as a classroom resource to improve teaching delivery.
Download and study Basic Science lesson notes for JSS1 to JSS3. Well-structured, syllabus-aligned notes for students and teachers based on the Nigerian curriculum
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,… Read More »Radioactivity: Alpha, Beta, Gamma Emission
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, … Read More »Simple Machine: Types, Level & Maintenance
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… Read More »Family of Life Education 2
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… Read More »Energy and Society
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… Read More »Renewable and Non-Renewable Energy
Meaning of Energy Energy is defined as the ability or capacity to do work. The unit of energy is Joules (J) Sources of Energy There are two main sources of… Read More »ENERGY
Counselling and Testing In today’s fast-paced and often overwhelming world, young people face various emotional, psychological, and health-related challenges. Whether it’s academic pressure, peer issues, mental health concerns, or questions… Read More »HIV/AIDS II
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.… Read More »HIV/AIDS
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… Read More »Sexually Transmitted Infections
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… Read More »Environmenttal Pollution I
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… Read More »Reproduction System: Male & Female Reproduction
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,… Read More »Changes in States of Matter Using Kinetic Theory
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… Read More »Changes in States of Matter Using Theory
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… Read More »Molecular Structures Using Kinetic Theory
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.… Read More »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… Read More »Family Life Education
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… Read More »Energy Transfer
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… Read More »Potential and Kinetic Energy