<h1><strong>CHANGES IN LIVING THINGS (GROWTH AND DEVELOPMENT)</strong></h1> CONTENT <ol> <li>Definition of Growth and Development</li> <li>Growth and Developmental Changes</li> <li>Characteristic Features of Developmental Stages</li> <li>Classifying Growth and Developmental Changes (Temporary and Permanent Changes)</li> <li>Factors Affecting Growth and Development</li> </ol>   <h2><strong>Definition of Growth and Development</strong></h2> Growth is the permanent increase in size of an organism due to increase in number of cells. Growth is brought about by cell division. Development is a series of orderly changes by which a living thing comes into maturity. It is a series of changes that occur during growth. It is a gradual process leading to maturation of organs and behaviour of individual like social, emotional as well as skill acquisition.   <h2><strong>Growth and Developmental Changes</strong></h2> The noticeable changes in the body size over time is termed<strong> growth change. Growth </strong>change can be determined by measure of height and weight at time intervals while developmental changes can be observed by appearance of certain characteristics features and capabilities. Development leads to transition from one stage of life to another e.g a baby develops from infancy to childhood, then to adolescence and to adulthood. Developmental changes are progressive and move from simple to complex.   <h2><strong>Characteristic Features of Developmental Stages</strong></h2> The developmental changes are characterized by certain features which include the following:

<h1><strong>ADAPTATION OF ORGANISMS TO THEIR HABITATS</strong></h1> CONTENT <ol> <li>Meaning of Adaptation</li> <li>Characteristics of Organisms Found on Land</li> <li>Characteristics of Organisms Found in Water</li> </ol>   <h2><strong>Meaning of Adaptation</strong></h2> Adaptation means special features that help an organism to live and survive in a particular habitat. Every living thing on earth belongs to one habitat or the other because it is always interacting with some biotic and abiotic components such as energy, water, air (oxygen), food, carbon dioxide and suitable living conditions. For example, there are certain species of plants and animals that can survive only in rain forest habitat and not in the desert and vice versa. <br> <h2><strong>Characteristics of Organisms Found on Land</strong></h2> The following are the characteristics of organisms found on land:

<h1><strong>CHANGES IN NON-LIVING THINGS</strong></h1> CONTENT <ol> <li>Types of Changes in Non-living Things</li> </ol>   <h2><strong>Types of Changes in Non-living Things</strong></h2> Non-living matter undergo changes i.e they can be made to change from one state to another. They can be made to form new substances. Changes in non-living things can be classified into physical changes and chemical changes.   <h2><strong>Physical Changes</strong></h2> Physical changes are changes in which no new substances are formed. A physical change is a temporary change, It is reversible. The composition of the new substance does not change when undergoing a physical change. Examples are: 1. Melting of candle wax. 2. Dissolution of salt in water to form a salt solution. Salt + Water <img class="alignnone size-full wp-image-14541" src="https://classhall.com/wp-content/uploads/2018/03/single-arrow.jpg" alt="right pointing arrow" width="77" height="7" /> Salt solution 3. All changes in state of matter are physical changes. Such as, vapourization of liquid to gases.