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JSS2 First Term Basic Science Lesson Note – Changes in Living Things (Growth and Development)

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WEEK FIVE

Topic: LIVING THINGS

SUB-TOPIC: Changes in living things (Growth and Development)

CONTENT:

  1. Definition of growth and development
  2. Growth and developmental changes (Childhood and infancy, adolescence, Adulthood
  3. Characteristic features of stages of development
  4. Classifying growth and developmental changes (Temporary and permanent Changes).

 Definition of growth and development

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 behaviours of individual like social, emotional as well as skill acquisition.

Growth and developmental changes

The noticeable changes in the body size over time is termed growth change. Growth 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.

Characteristic features of developmental stages

The developmental changes are characterized by certain features which include the following:

  1. Infancy and childhood

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