Basic Science JSS3 First term

Sub-theme: learning about our environment

WEEK 8

Environmental Hazards VI

Performance objectives

Students should be able to:

1. Identify the location of the ozone layer in the atmosphere
2. State the importance of the ozone layer
3. State the effect of ozone layer depletion

Content

Ozone layer and its location in the atmosphere

The ozone layer is a natural layer of gas in the upper atmosphere. The earth’s atmosphere is divided into three layers namely: troposphere, stratosphere, and ionosphere. The ionosphere is further divided into the mesosphere and thermosphere.

The ozone layer is located in the stratosphere. Ozone forms a layer of the upper atmosphere, where it acts as a shield that prevents most of the ultraviolet radiation in sunlight from reaching the earth’s surface. In recent years, reports from the research satellites have shown that.... View More