Page 66 - Journeys Through Society-7

non-living things in the environment. It might include Four Realms of the Earth
temperature, light and water.
The natural environment comprises the four realms of
Wow Fact the Earth.

Fungi are Earth’s environmental managers! Atmosphere
Without them all life in the forest would be Atmosphere is the gaseous layer which surrounds the
buried under layers of dead matter.
Earth and is kept in place by the Earth's gravitational
pull. The air around us is a mixture of gases out of
which nitrogen is the most abundant, constituting 78
Biotic Environment
per cent of the total. Nitrogen is essential to maintain
A biotic environment is home to living things that
soil fertility. Oxygen makes up 21 per cent of the air
directly or indirectly affect other living things. A living
and is an essential life-giving gas. Gases found in small
thing that alters its surroundings is referred to as a
amounts include carbon dioxide, which is required by
biotic factor. Animals, plants, fungi and
plants during the process of photosynthesis. It is a
microorganisms are considered to be biological
greenhouse gas and is responsible for keeping the
elements.
atmosphere warm. Water vapour is another

Air
(Atmosphere)
Land
(Lithosphere) Parks
Buildings

Living Things Roads
(Biosphere) Human
Natural
Made

Components of
ENVIRONMENT

Monuments
Water
(Hydrosphere)

Human

The components of the environment
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