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Important Geography Notes for (9th graders)

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  • Geography
  • Instelling
  • Freshman / 9th Grade

Dive into the fascinating world of geography, where every line of latitude and longitude tells a story about our planet's history, diversity, and future. Our comprehensive guide breaks down critical concepts such as plate tectonics, climate zones, and river systems, offering insights into the force...

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  • 8 december 2024
  • 73
  • 2024/2025
  • College aantekeningen
  • Mettao maria
  • Alle colleges
  • Freshman / 9th grade
  • Geography
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Important Geography Notes for SSC CHSL
S.No Contents Page
Number
1 Solar system 2
2 The earth 7
1.Rotation of earth
2.Revolution of the earth
4.Seasons
5. Eclipses
6. Latitude and Longitude

3 Interior of the earth 11
4 Rocks 12
5 Soils 13
6 Landforms 14
7 Atmosphere 15
1. Structure of the atmosphere
2.Weather and climate
3.Wind
8 Isolines 17
9 Earthquake and Volcano 18
INDIAN GEOGRAPHY
10 India-size and location 19
11 The physical features of India 20
12 Drainage System of India 25
13 List of Indian rivers and their place of Origin 28
14 List of dams in India 28
15 List of lakes in India 29
16 Climate of India 31
17 Natural vegetation 32
18 Wildlife 33
1. Biosphere reserves in India
2. List of important national parks in India
19 Agriculture in India 38
1.Soils
2.Cropping seasons in India
3.Major crops cultivated in India
20 Largest crops producing states 41
21 List of important agricultural revolutions in India 42
22 Top mineral producing states in India 42
23 Industries 43
24 Transportation 45
25 Population 51
26 Tribes in India 51

, 27 List of Indian cities on rivers banks 53
28 Important mountain passes in India 53
29 UNESCO’s world heritage sites in India 54
WORLD GEOGRAPHY
30 Oceans on the earth 55
31 Major straits of the world 57
32 Lakes 58
33 List of major rivers of the world 59
34 The continents of the world 60
35 List of important countries and their capitals & currencies 61

36 Landlocked countries in the world 63
37 Important international boundary lines in the world 64
38 Important cities situated on the banks of river (world) 65
39 Distinctive names of countries & towns (world) 65
40 Tribes and Races of the world 67
41 Largest producing countries of agricultural commodities in world 68
42 List of minerals and their leading producing countries 69
43 Geography one liners 70


SOLAR SYSTEM

• Our solar system is a part of Milky Way galaxy. In ancient India, it was imagined to be a river of light flowing
in the sky. Thus, it was named Akash Ganga
• A solar system consists of a sun at the centre and the eight planets, moons, asteroids, comets and meteoroids
that revolve it. The gravitational attraction between the Sun and these objects keeps them revolving around it
• The sun, the moon and all those objects shining in the night sky are called celestial bodies
• The study of universe is known as cosmology
• The size of the solar system has been estimated to at about 10^5 AU
• The eight planets, namely the Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune, revolve
around the sun in fixed elliptical paths known as ‘orbits’.
• Pluto is dwarf planet
• The light-year is a unit of length used to express astronomical distances


SUN

• The sun is in the centre of the solar system.
• The sun is the ultimate source of heat and light for the solar system
• The sun is about 150 million km away from the earth.
• Light takes about 8.5 minutes to reach the earth from the sun
• Hydrogen and helium are the main gases present in the sun.

, • The boundary between the Sun's interior and the solar atmosphere is called the photosphere. It is the visible
‘surface’ of the Sun
• The core is at the centre of the sun. It is the hottest region, where the nuclear fusion reaction takes place to
give the sun power
• The outer layer of sun atmosphere made up of thin hot gases is called corona. Corona is visible only during a
total eclipse of the sun
• Sun has a surface temperature of 6000 degree Celsius
• The temperature at the centre of sun is around 1.5*10^7 K

PLANETS

• The planets are classified in order of their distance from the sun and based on their characteristics. They are:
1. The inner planets or terrestrial planets or rocky planets. Mercury, Venus, Earth and Mars are called
inner or terrestrial planets.
2. The outer planets or gaseous planets or giant planets. Jupiter, Saturn, Uranus and Neptune are called
outer or gaseous planets.
• All the eight planets of the solar system move around the sun in fixed paths. These paths are elongated. They
are called orbits
• A night planet has been recently discovered by NASA named as Carla

MERCURY

• Mercury is nearest to the sun and it is the smallest planet in the solar system
• Mercury has no satellite of its own
• It rotates on its own axis in 58.65 earth days while it takes 88 Earth days to complete one revolution around
the sun
• The sunlight takes 3.2 minutes to travel from the Sun to Mercury
• Mercury has no protective blanket like Ozone around it to prevent us from harmful radiations

VENUS

• Venus is the second planet in distance from the sun
• Venus is earths nearest planetary neighbour. It is the brightest planet.
• Venus has no moon or satellite of its own. Rotation of Venus on its axis is somewhat unusual. It rotates from
east to west. Only Venus and Uranus have this backwards direction
• It completes one rotation in 243 Earth days which is the longest day of any planet in our solar system
• The Venus takes 224.7 Earth days to complete one revolution around the sun, and it has no natural satellites.
• Venus is 0.7 astronomical units away from the sun
• Venus is considered as ‘Earth’s-twin’ because its size and shape are very much similar to that of the earth. It’s
also called as ‘Earth sister’
• Venus is known as the evening star as well as Morning star

, • Venus is hotter than Mercury because Venus has an atmosphere which is thicker and made almost entirely of
carbon dioxide.
• The sunlight takes 6 minutes to travel from the sun to Venus

THE EARTH

• The earth is the third nearest planet to the sun. In size, it is the fifth largest planet
• The axis of rotation of the Earth is not perpendicular to the plane of its orbit. The Earth is 23.5 degrees tilted
on its axis and thus makes 66.5 degrees angle. The tilt is responsible for the change of seasons on the Earth.
The Earth has only one moon.
• The Earth rotates from west to east
• It is also known as the ‘Blue Planet’ because of the presence of water.
• Earth has only one natural satellite called the Moon.
• The Earth takes 365.25 days to complete one revolution around the Sun. It takes 23 hours 56 minutes and 4
seconds for the earth to complete one rotation on its own axis
• The sun light takes about 8.3 minutes to reach the earth
• Earth has a protective blanket of ozone layer high up in its atmosphere to save life from harmful ultraviolet
radiations coming from the sun

THE MARS

• Mars is the fourth nearest planet to the sun and it is the second smallest planet in the Solar system
• It is also described as the “Red planet”. It is reddish in colour due to the presence of iron oxide on its surface
• The landmass of Mars and Earth are very similar
• It takes 24 hours and 37 minutes to complete one rotation on its axis and its takes 687 days to complete one
revolution around the Sun
• Mars has two satellites namely Phobos and Deimos.

THE JUPITER

• Jupiter is the largest planet in the solar system. It is made primarily of gases and is therefore known as ‘Giant
Gas planet’
• Jupiter is also known as winter planet
• It takes 9 hours 55 minutes to complete one rotation on its axis and it takes 11.86 years to complete one
revolution
• Jupiter has the shortest day in the solar system.
• Jupiter has a faint ring system around it. They are mostly comprised of dust particles
• Jupiter has 67 confirmed satellites orbiting the planet. Ganymede, the satellite of Jupiter, is the largest natural
satellite in the solar system (even bigger than the planet Mercury)

THE SATURN

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