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What is Geography
Geography is the study of places and the relationships between people and their environments.The person who study Geography is called geographers. Geographers explore both the physical properties of earth’s surface and the human societies spread across it. They also examine how human culture interacts with the natural environment and the way that locations and places can have an impact on people. Geography seeks to understand where things are found, why they are there, and how they develop and change over time.
some Important Topics of Geography are-:
The sun is a star at the center of the Solar System. It is a nearly perfect sphere of hot plasma, with internal convective motion that generates a magnetic field via a dynamo process. It is by far the most important source of energy for life on earth. Its diameter is about 1.39 million kilometers, (109 times that of Earth) and its mass is about 330,000 times that of earth, accounting for about 99.86% of the total mass of the Solar System.
The moon is an astronomical body that orbits planet Earth, being Earth’s only permanent natural satellite. It is the fifth-largest natural satellite in the Solar System, and the largest among planetary satellites relative to the size of the planet that it orbits (its primary). Following Jupiter’s satellite Io, the Moon is the second-densest satellite in the Solar System among those whose densities are known.
The moon’s average orbital distance at the present time is 384,402 km (238,856 mi), or 1.28 light-seconds. This is about thirty times the diameter of earth, with its apparent size in the sky almost the same as that of the Sun (because it is 400x farther and larger), resulting in the Moon covering the Sun nearly precisely in total solar eclipse. This matching of apparent visual size will not continue in the far future, because the moon’s distance from earth is slowly increasing.
Earth is the third planet from the Sun and the only object in the Universe known to harbor life. According to radiometric dating and other sources of evidence, Earth formed over 4.5 billion years ago. Earth’s gravity interacts with other objects in space, especially the sun and the moon, Earth’s only natural satellite. Earth revolves around the Sun in 365.26 days, a period known as an Earth year. During this time, earth rotates about its axis about 366.26 times.
Here i have listed Important Questions of Geography that generally ask in examination…(Part-1)
Next part will come soon
1. How much energy the earth is receiving per second from the moon ?
2. How many kg the mass of sun is decreasing per second ?
3. For how many years the sun can supply energy to the earth ?
4. How much temperature is required for the Nuclear Fusion ?
5. When was the Hydrogen bomb was discovered ?
=>In 1952 A.D
6. Who discovered the Diode Valve ?
=> J.A Fleming in 1904 A.D
7. Who discovered the Triode Valve ?
=>Lee De Forest in 1907 A.D
8.Maximum how much time the Artificial Satellites take to complete one Revolution of earth ?
10. Which instrument is used to measure the Atmospheric pressure ?
11. What is the wavelength range of Electromagnetic wave ?
=>10-14 m to 104 m
12. Who introduced the concept of Mechanical wave ?
13. What is speed of Sound in Air at 0° C. ?
14. What is speed of Sound in Air at 20° C. ?
15.What is speed of Sound in Water at 20° C. ?
17. To hear Echo Sound , what is the maximum distance between the observer and the reflector ?
18. Who first measured the speed of Light and when ?
=>Roemer in 1678 A.D
19. What is speed of Light in air ?
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