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LESSON NOTE ON JSS2 BASIC SCIENCE FOR THIRD TERM

What is basic science as a subject?

The word “basic” refers to something necessary and most important to everyone. Basic science as an integrated science course is a subject that deals with the study of living things and non-living things. It also combines all other science subjects such as physics, biology, health science, agricultural science, geography, etc.

Scheme Of Work.

Week One: Thermal Energy

Week Two: Reproductive Health 

Week Three: Measurement 

Week Four: Force

Week Five: Energy and Appliances in The Home  

Week Six: Drug Abuse

Week Seven: Crude Oil and Petrochemicals 

Week Eight: Elements, Compounds and Mixtures 

Week Nine: Reproduction In Plants

 

Week One Topic: Thermal Energy

Introduction

Energy transfer is the process of transmitting or transferring energy from one place to another. The word thermal means heat. Thermal energy is the transfer of heat from one place to another.

Heat Flow

Energy transfer means that energy moves from one place to another (without changing form). The process of heat flow from the sun to us is referred to as radiation. The process of heat flow from the soup to the spoon discussed is referred to as conduction. There is the third process of heat flow known as convection. Therefore, heat flow means that heat energy is transferred from a hotter part of an object to the cooler part of the object. Heat is a form of energy that flows from a hot area to a cold one. To learn more: Click here

 

Week Two Topic: Reproductive Health 

Meaning of Reproductive Health

Reproductive health is the ability of people to have a satisfying and safe sex life and the capability to reproduce as well as the freedom to decide if, when and how often to do so.

Significance of Reproductive Health

Reproductive health is significant because it promotes good sexual health which enhances life and personal relations. It is also a prerequisite for social, economic and human development i.e. human energy and creativity is the driving force of development and this cannot be generated by a sick person. It sets the stage for health beyond the reproductive years for both men and women. Similarly, the health of a newborn is largely a function of the mother’s health, nutritional status and access to good health care.  To learn more: Click here

Week Three Topic: Measurement

Introduction

Measurement is one of the fundamental concepts in experimental sciences, including physics. Measurement is the process of attaching a numeric value to an aspect of a natural phenomenon, such as the volume of the milk produced by a cow, in order to be able to describe that phenomenon accurately and make comparisons to other similar phenomena.

Importance of measurement

Unless we are able to measure some phenomena, we cannot say we scientifically know anything about that thing.

To learn more: Click here

Week Four Topic: Force

Introduction

You must have seen a broken-down vehicle in your town or village. Assuming this car is to be taken to a nearby mechanic village, what do you think must be done to it? To make the broken down car move to the mechanic village, you have to push it or get a towing van to pull it to the mechanic village. The pushing or pulling of the car to the place is an application of force. It is force that is pushing or pulling the car. To make the car go faster, we push harder, that is, we apply greater force. Note that push and pull are examples of force.

What is Force?

A force is a push or pull upon an object resulting from the object’s interaction with another object. Whenever there is an interaction between two objects, there is a force upon each of the objects. When the interaction ceases, the two objects no longer experience the force. Forces only exist as a result of an interaction. To learn more: Click here

 

Week Five Topic:: Energy and Appliances in The Home  

Introduction

Energy lights our cities, powers our vehicles, and runs machinery in factories. It warms and cools our homes, cooks our food, plays our music, and gives us pictures on television.

Energy is defined as the ability or the capacity to do work.

We use energy to do work and make all movements. When we eat, our bodies transform the food into energy to do work. When we run or walk or do some work, we ‘burn’ energy in our bodies. Cars, planes, trolleys, boats, and machinery also transform energy into work. Work means moving or lifting something, warming or lighting something. There are many sources of energy that help to run the various machines invented by man. To learn more: Click here

 

Week Six Topic: Drug Abuse

Content

Meaning of Drug

Meaning of Drug Abuse

Methods of Drug Use

Common ways of misusing drug

Social risk factors in Drug abuse

Causes of Drug Abuse

Peer Influence

A. Meaning of Drug

A drug is a chemical substance that changes a person’s mood or behaviour when it is smoked, injected, inhaled, drank or swallowed in pill form. A drug is any substance other than food that by its chemical or physical nature can affect the structure or functions of a living organism. To learn more: Click here

 

Week Seven Topic: Crude Oil and Petrochemicals 

Introduction

Nigeria as a nation is blessed with abundant mineral resources. These minerals include coal, columbite, limestone, tin and crude oil. Crude oil is also called petroleum. Crude oil is a mixture of hydrocarbons. It occurs naturally beneath the earth’s surface. In Nigeria, it is dark brown in colour. It is a source of great revenue for Nigeria. It is believed that natural crude oil (petroleum) was formed from deep carbon deposits (remains of animals and plants) that date back to the formation of the earth.

Meaning of Crude Oil as Petrochemicals

Crude oil is a mixture of hydrocarbons. It exists in the liquid phase in natural underground reservoirs and remains liquid at atmospheric pressure after passing through surface separating facilities.

To learn more: Click here

Week Eight Topic: Elements, Compounds and Mixtures 

Introduction

In our environment, we see iron nails, sulphur roll, copper wire, aluminium sheets, etc. we also breathe in oxygen (air) to stay alive. These substances: iron, sulphur, copper and oxygen, are referred to as elements.

Elements

Elements are substances that cannot be separated into simpler substances.

Any substance that contains only one kind of atom is known as an element. Salt is made up of the elements sodium and chloride. Water is made up of the elements hydrogen and oxygen.

Each element is represented by a unique symbol. The notation for each element can be found on the periodic table of elements. To learn more: Click here

Week Nine Topic: Reproduction In Plants

Introduction

Plant reproduction is the production of new individuals or offspring in plants, which can be accomplished by sexual or asexual reproduction. Sexual reproduction produces offspring by the fusion of gametes, resulting in offspring genetically different from the parent or parents. Asexual reproduction produces new individuals without the fusion of gametes, genetically identical to the parent plants and each other, except when mutations occur. All living things reproduce. Reproduction is the process of generating offspring. To learn more: Click here

 

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