Topics in GeographyGeography Scheme of Work, SS1, First Term Geography Scheme of Work, SS1, Second Term Geography Scheme of Work, SS1, Third Term Classification | Types of Planets and their Characteristics Planets of the Solar System with their Characteristics Functions of the Atmosphere Layers of the Atmosphere Solar System in Geography Atmosphere: Composition of the Atmosphere Geography, Types and Branches of Geography Characteristics and Examples of Igneous, Sedimentary and Metamorphic Rocks
Academic Questions in Geography
The solar system is defined as system comprising the sun, all the planets that revolve around it including their moons, the comets, meteoroids, asteroids and interplanetary medium.
The solar system is contained in the universe. The universe is unimaginably big, such that not all of it can be seen. An object that moves through the space of the universe will likely do so forever.
From the above definition of the solar system, we can put the contents of the solar system into the followings:
- Moons or Satellites
- Interplanetary medium
Note: The interplanetary medium are the small scattered particles that exists between the planets and other constituent bodies of the solar system. It's consists mainly of gas and dust.
The sun (which is over 300,000 times bigger that the earth) is a star. In fact, it is an average sized star. This will imply that there are other stars that are bigger than the sun.
Note: The closest star to the sun is called Proxima Centauri with a distance of about over 4.3 light years away from it.
The sun is the greatest source of light and heat in the universe. For this reason, it becomes the ultimate source of energy on Earth; and the reason for life's existence on earth.
Our galaxy (called the Milky Way) contains over 220 billion stars; and it’s only one of the billions of galaxies in the observable universe.
All the planets (including most of the planet’s satellite) and asteroids revolve round the sun.
The orbital plane around the sun on which the planets revolve is called ecliptic.
Below is a diagram showing the Solar System (including the ecliptic and each planet's satellite):
Image Credit: Slide Player
The average distance between the earth and the sun is about 149.6 million kilometers and it will take the earth 365 one-quarter days (or 1 year) to make a complete orbit (or revolve) round the sun. This process is referred as the revolution of the earth.
The revolution of the earth is responsible for the seasonal changes we experience here (on earth).
Note: A satellite is a body that revolves round (or orbit) the earth or another planet. It can be natural or artificial.
The moon is the natural satellite of planets in the solar system.
Note: It is important to understand that the planets, moons, stars and other elements in space are held in place by the gravity.
13 planets make up the solar system. Nine of these are categorized (considered as the official planets) while four are uncategorized.
The 9 official planets beginning from the closest to the sun are:
Below are the 4 uncategorized planets:
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Amazing facts in Geography
Earth is the only planet that contains water on it's surface. In fact, the percentage of water on Earth is greater than that of land.
Salt water or Saline water makes up about 97% of Earth's water. It comprises majorly of ocean and sea waters
Metal actually rains on planet Venus
Planet Mars appear brownish/red because it's covered with iron rust.
China is the largest emitter of carbon IV oxide (CO2) in our world today
There are over 125 billion galaxies in our universe. Our galaxy (called the milky way) has about 100-400 billion stars.
The 🌞 sun is actually a 🌟 star; and a single star can be 100 times bigger than the earth.
It is estimated that 50% of all gold ever mined on Earth came from South Africa.
Infact, it came from a single plateau in South Africa called Witwatersrand
We have 7 continents. All the 7 continents ends with the alphabet that began it.
The continents are:
- North America
- South America
Instabul is a city in Turkey. It's the only city that lies between two continents. Instabul lies between Europe and Asia
It is believed that the Amazon rainforest is responsible for producing about 20% of earth's oxygen.
Please read on tropical rainforest here.
NOTABLE POINTS IN Geography