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JSS2: BASIC SCIENCE - 1ST TERM

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  1. Living Things (Habitat) | Week 1, 2 & 3
    8Topics
    |
    1 Quiz
  2. Living Things (Uniqueness of Man) | Week 4
    9Topics
    |
    1 Quiz
  3. Growth and Development | Week 5 & 6
    4Topics
    |
    1 Quiz
  4. Chemicals | Week 7 & 8
    4Topics
    |
    1 Quiz
  5. Work, Energy & Power | Week 9
    4Topics
    |
    1 Quiz
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Meaning of Growth:

Growth can be defined as an irreversible increase in the size and weight of an organism, due to the addition of new body cells. It must be noted that for growth to occur, the rate of synthesis (formation) of materials (anabolism) must exceed the rate of breakdown of materials (catabolism) therefore, the ability of living things to build up their own complex, organized bodies from materials in the environment is the ability to grow, and it is a characteristic of life.

Growth Changes:

1. Height: Height is the increase in the length of a living organism. If you observe yourself, you will notice that your height in primary 5 is not your height now in JSS2. You will observe that you have grown bigger and taller. Some of your clothes especially your trousers are now shorter for you, also the shoes you wore in primary 5 do not fit anymore because they are probably too small. This is a result of growth changes. Height is measured in meters.

2. Weight: Weight increases with growth; this makes an individual become heavier as his age increases. For example, the weight of a baby at birth increases as the baby grows, also your weight in primary 5 is not the same as your weight presently in JSS2.

3. Size: Growth leads to an increase in size, the body especially gets bigger, shoes and clothes have to be changed frequently as the child grows because the clothes, and shoes become undersized. For example, some of the clothes you wore in primary school are probably too small for you, now that you are in JSS2.

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