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major domains of the earth
Transcript of major domains of the earth
the gaseous layers that surround the
covers a very big
area of the earth's surface
the Biosphere . . .
Three main components of the environment.....
the solid portion of the
on which we live is called .............
is called Atmosphere
where oxygen , nitrogen,
and other gases are found.
this area is called as
it comprises water in all its forms ,ie. ice,water & water vapour
is the narrow zone where we find land,water and air together, which contains all forms of life.
the solid portion of the earth is called
there are two main divisions of the earth's surface.
the large landmasses are known as the continents
the huge water bodies are called the ocean basins
level of the sea water remains same everywhere.
elevation of land is MEASURED from the level of the sea, which is taken as ZERO.
all the oceans
of the world
with one another
we have SEVEN major CONTINENTS
it's trivia time
TRIVIA TIME !!!!
It is the largest continent .It covers one-third of earth’s surface.
Also it is the biggest in terms of population in the world. Half of the world population lives here. World’s two most populous countries, China & India are in this continent.
It is also the place of great ancient civilizations- Chinese, Harrapan.
it lies in the eastern hemisphere .
tropic of cancer passes through this continent.
it is the largest island . It is also the smallest continent in the world.
It is also known as “island continent”.
this continent has only one country .
It lies entirely south of the equator and is called land down under.
it lies entirely in the southern
It is the only continent without any deserts.
Golf started in Scotland and Cricket was first played in Britain,both of these countries are in this continent .Similarly piano and guitar are the inventions of this continent.
One of the unusual festival of this continent is the Tomatina Festival ,it is celebrated in Spain. In this ,every participant is involved in throwing tomatoes at each other.
Erin Ate Nine Sticky Apricots At Aprils.
the Arctic circle passes through it
bound with water bodies on 3 sides
it was named after the explorer Americo Vespucci.
it is the only continent that has every kind of climate
it is the 3rd largest continent in the world.
The Elf, the world's smallest owl in the world in also found in this continent.
Major Animals of this continent are-Brown Bears, bald Eagles, Hummingbirds, Bullfrogs
Home of Google, Face Book, Apple & many other world famous technology companies.
North America lies completely in the Northern & Western Hemisphere.
THIS STRIP OF LAND IS CALLED AS
"ISTHMUS OF PANAMA".
IT LINKS THE CONTINENT WITH SOUTH AMERICA.
THREE OCEANS SURROUND THIS CONTINENT.
CAN YOU NAME THEM?
WHAT IS THE DIFFERENCE BETWEEN AN ISTHMUS AND A STRAIT?
NAME THE STRAIT BETWEEN INDIA AND SRI LANKA.
it's trivia time!!
this continent is also the home of anaconda,one of the world's largest snakes.
It also has the largest salt lake of the world: Salar de Uyuni (Uyuni salt flats).
The Angel Falls ,is the Highest Waterfall in the World.
It also has the world’s largest river –In length ,it is the second longest river in the world (6440 km)
Soccer is the dominant game in this continent.
south america lies in the southern hemisphere
the ANDES are the world's longest mountains. It runs from north to south.
it's trivia time!!
It is the second largest continent.
It is the home of the Nile ,
the longest river in the world.
It is also the home of the Sahara, the largest desert in the world.
66% of world's chocolate comes from here.
it is considered to be the place where the first human lived and learned to use tools.
the EQUATOR runs almost through the middle of AFRICA.
A large part of it lies in the Northern Hemisphere.
it is the windiest continent on earth.
The water of the continent is so cold that nothing can rot here.
it is a frozen land area around the South Pole.It is also called “Frozen Continent” . Antarctica is the highest, driest, windiest, emptiest, coldest place on earth.
it has no permanent human settlements.
it is located in the South Polar Region, it is permanently covered with thick ice.
its trivia time!!
the SOUTH POLE lies almost at the centre of ANTARTICA.
India has research stations there like many other countries.
NAME THE SEVEN CONTINENTS.
( can refer to it if time permits)
It covers 71% of the earth’s surface.
It is made up of water bodies like oceans, seas, bays, gulfs, rivers, lakes, ponds, glaciers and also the water vapor in atmosphere etc.
It also consists of ground water which collects under the earth’s surface by seepage of surface water or water from the air.
the earth is called
the blue planet
more than 97% of the Earth's water
is found in the oceans and is too
only 3% of the Earth's water is
available as fresh water for us.
The temperature of ocean water decreases as we move away from the equator.
The temperature of ocean water also changes with increasing depth.
Salinity (salt content) of ocean water varies from place to place.
Ocean water has 3 distinct movements –
The envelope of air surrounding the earth.
this thin blanket of air is an integral aspect of our planet.
it provides us with the AIR we breathe and protects us from the harmful effects of SUN RAYS.
The atmosphere extends upto 1600km from the ground.
It consists of a mixture of gases – nitrogen, oxygen, carbon dioxide, hydrogen, helium & argon.
Oxygen is the breath of life.
Nitrogen helps in the growth of living organisms.
Carbon dioxide absorbs the heat radiated by the earth. it is also essential for the growth of plants.
the layers of the atmosphere.
the climbers have problems in breathing due to the decreasing the density of air. they have to carry oxygen cylinders with them.
the temperature also decreases as we go upwards.
it is the atmosphere that exerts
pressure on the earth.
this varies from place to place.
some areas experience
pressure & some
The biosphere is the narrow zone of contact between the land, water and air.
It is in this zone that life, that is unique to this planet, exists.
There are several species of organisms that vary in size from microbes and bacteria to huge mammals. All the living organisms including humans are linked to each other and to the biosphere for survival.
all the 3 components interact and affect one another.
Emission from industries, thermal power plants
and vehicles, pollute the air. Carbon dioxide (CO2) is
an important constituent of air.
But increase in the amount of CO2 leads to increase in global temperatures.
This is termed as GLOBAL WARMING.
There is thus, a need to limit the use of resources of the earth to
maintain the balance of nature between the domains
of the lithosphere, the atmosphere and the
Answer the following questions briefly.
(a) What are the four major domains of the earth?
(b) Name the major continents of the earth.
(c) Name the two continents that lie entirely in the Southern Hemisphere.
(d) Name the different layers of atmosphere.
(e) Why is the earth called the ‘blue planet’?
(f) Why is the Northern Hemisphere called the Land Hemisphere?
(g) Why is the Biosphere important for living organisms?