Interesting And Important Facts About Earth Planet

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• MCQs
• Thing to Remember

Recommended: Structure of Earth – Crust, Upper & Lower Mantle, Outer & Inner Core

Earth Planet

What is the equatorial radius of the Earth?

1. 7,378 km
2. 6,378 km
3. 5,378 km
4. 4,378 km

Where “Mariana Trench” is located?

1. Arctic Ocean
2. Southern Ocean
3. Pacific Ocean
4. Atlantic Ocean

 What is the average distance of Earth from sun?

1. 119,597,870 km
2. 129,597,870 km
3. 139,597,870 km
4. 149,597,870 km

What is the volumetric mean radius of this planet?

1. 6,371 km
2. 7,371 km
3. 8,371 km
4. 9,371 km

What is the longest day at the South Pole?

1. December 22
2. November 22
3. October 22
4. September 22

Choose the orbital period of the life supporting planet?

1. 355.25 days
2. 375.25 days
3. 345.5 days
4. 365.25 days

What is the deepest point?

1. Challenger Deep
2. Death Deep
3. Puerto Rico
4. Bentley Subglacial Trench

What is the radius at North & South Pole?

1. 7,356 km
2. 6,356 km
3. 5,356 km
4. 4,356 km

What is the longest day at the North Pole?

1. May 22
2. June 22
3. July 22
4. August 22

What is the rotation period of the life supporting planet?

1. 24 hours 1 min 3 sec
2. 23 hours 56 min 4 sec
3. Both are correct
4. None of these

Although, the crust, mantle, outer core and inner core; all has separate value for density but what is the average density?

1. 5.52 g/m³
2. 5.52 kg/cm³
3. 5.52 kg/m³
4. 5.52 g/cm³

What is the age of the Earth?

1. 3.5 billion years
2. 4.5 billion years
3. 5.5 billion years
4. 6.5 billion years

What is the elevation of Mount Everest?

1. 28,028 ft
2. 29,029 ft
3. 30,030 ft
4. 31,031 ft

What is the shortest day at the north pole?

1. November 21
2. December 21
3. May 21
4. June 21

What is the orbital distance of “watery planet”?

1. 940,329,468 km
2. 840,329,468 km
3. 740,329,468 km
4. None of these

What is the highest point on this planet?

1. Nanga Parbat
2. Mount Kilimanjaro
3. Mount Everest
4. Mount Blanc

What is the orbital speed?

1. 30 km/sec
2. 20 km/sec
3. 10 km/sec
4. None of these

What is the shortest day at the south pole?

1. November 21
2. December 21
3. May 21
4. June 21

What is the meridional diameter?

1. 13712 km
2. 10712 km
3. 11712 km
4. 12712 km

What is the percentage of oxygen in the atmosphere?

1. 20.95%
2. 21.95%
3. 22.95%
4. 23.95%

What is the orbital speed in kilometer per hours?

1. 105200 km/h
2. 107200 km/h
3. 109200 km/h
4. 110200 km/h

What we call the point in the orbit of a planet, asteroid or comet at which it is closest to the Sun?

1. Equatorial
2. Aphelion
3. Perihelion
4. None of these

What we call the point in the orbit of a planet, asteroid or comet at which it is farthest from the Sun?

1. Perihelion
2. Aphelion
3. Both are correct
4. None of these

What is the perihelion of this life supporting planet?

1. 147 million km
2. 145 million km
3. 143 million km
4. 141 million km

What is the percentage of nitrogen in the atmosphere?

1. 84.09%
2. 82.09%
3. 80.09%
4. 78.09%

Where Dead Sea is located?

1. Between Musandam & its mainland Oman
2. Between UAE & Iran
3. Between Yemen & Ethiopia
4. Between Israel & Jordan

What is the elevation of the Mount Everest?

1. 8,848 m
2. 8000 m
3. 8,248 m
4. 700 m

The study of lower atmosphere over long periods of time is called?

1. Climatology
2. Meteorology
3. Hydrology
4. Biogeography

What is the aphelion of this planet?

1. 159 million km
2. 157 million km
3. 155 million km
4. 153 million km

What is the average temperature?

1. 13^oC
2. 15^oC
3. 17^oC
4. 19^oC

What is the equatorial diameter?

1. 12,756 km
2. 14,756 km
3. 156,756 km
4. 158,756 km

What is the lowest point at the surface of “Watery Planet”?

1. Death Valley
2. Yangtze Kiang
3. Red Sea
4. Dead Sea

What is the equatorial circumference?

1. 30075 km
2. 40075 km
3. 50075 km
4. 60075 km

There are ________ oceans on this planet.

1. 4
2. 5
3. 6
4. 7

What is the mass of planet which is located at number third in our solar system?

1. 5.97 x 10^24 kg
2. 6.97 x 10^24 kg
3. 7.97 x 10^24 kg
4. 8.97 x 10^24 kg

The study and investigation of all aspects of fresh water is dealt with _________

1. Oceanography
2. Hydrology
3. Climatology
4. Astrophysics

What is the meridional circumference?

1. 20024 km
2. 30024 km
3. 40024 km
4. 50024 km

Choose a planet which as no ring around.

1. Neptune
2. Saturn
3. Jupiter
4. Earth

The study of rocks and the changes that have occurred or occurring in the planet is called?

1. Biogeography
2. Geology
3. Astrophysics
4. Lithosphere

Which planet has one moon?

1. Jupiter
2. Neptune
3. Mars
4. Earth

Choose a right option about the planet which is called “Life Supporting Planet”?

1. Mars
2. Uranus
3. Venus
4. Earth

What is the equatorial inclination?

1. 23.5^o
2. 24.5^o
3. 25.5^o
4. 26.5^o

What is the most prominent feature of Earth?

1. Red and second smallest planet
2. Biggest, most massive and fastest rotating planet
3. Smallest and fastest revolving planet
4. Heaviest and most dense planet

Earth is divided into ________ continents.

1. 5
2. 6
3. 7
4. 8

What is the rotation speed?

1. 1,670 km/h
2. 1,560 km/h
3. 1,450 km/h
4. 1,340 km/h

___________ is the investigation of physical processes in lower atmosphere where Earth’s weather is produced.

1. Astronomy
2. Climatology
3. Meteorology
4. Geology

The study of seas in all its aspects is called?

1. Zoogeography
2. Biogeography
3. Hydrology
4. Oceanography

Area wise, which is the biggest continent of the world?

1. North America
2. South America
3. Asia
4. Africa

Things to Remember

• Earth Science is that branch of science which deals with the study of Earth. Generally it includes Lithosphere, Hydrosphere, Biosphere, Climatology, Meteorology, Biogeography, Zoogeography, Oceanography, Hydrology, Astronomy and Astrophysics.

• Generally, there is wrong perception about meteorology and climatology because apparently it looks both are same. Buy actually, Meteorology is the investigation of physical processes in the lower atmosphere where Earth’s atmosphere is produced while Climatology is the study of the lower atmosphere over long periods of time.

• Hydrology is the study of fresh water at over near Earth’s surface.

• Geology deals with the study of rocks and changes that have occurred or occurring on the planet.

• The vast study of seas is called Oceanography.

• Earth takes about 365.25 days to orbit the sun. The orbit is not a circle. The orbit is an ellipse, but to calculate the orbital distance of the Earth, let suppose it is a circle. The distance of Earth from Sun is 149,597,870 km according to International Astronomers Union. We can suppose, it is radius (R). We know the formula of circumference
  C = 2 x π x R
  C = 2 x 22/7 x 149,597,870
  C = 940,329,468 km (940 million km)
  It means orbital distance of Earth is 940,329,468 km.

• Now, by using the speed distance formula
  Speed = distance / time
  Earth’s speed can be calculate by dividing the distance over 365.25 days then dividing it over 24 to get the answer in km per hour, which equals 107,200 km/h.

• In outward appearance, the earth is nearly spherical ball with equatorial radius 6,378 km (meridional radius 6,356 km and volumetric mean radius 6,371km), equatorial circumference 40075 km (meridional circumference 40024 km) and equatorial diameter 12,756 km (meridional diameter 12,712 km).

• The average temperature is a fundamental part of what allows Earth to be habitable. Of all the planets that have been found, Earth is the only one known to support life. NASA has reported that the average temperature of this planet is 15^oC. However, extreme temperatures are still possible on Earth.

• Earth has 7 continents and 5 enormous oceans. Asia has fairly large area, Africa follows it then North America, South America, Antarctica, Europe and Australasia. Oceans include Pacific Ocean, Atlantic Ocean, Indian Ocean, Southern Ocean and Arctic Ocean.

• Earth is only planet in our solar system which is “Life Supporting Planet”, it is also called “Watery Planet”.

• Our dear planet is the third planet from the sun and the only world known to support and atmosphere with nitrogen 78.09%, oxygen 20.95%, argon 0.93%, carbon dioxide 0.04% and small amounts of other gases. Like Mercury, Venus and Mars, it is rocky at the surface.

• Rotational period of the Earth is 23 hours 56 minutes 04 seconds and revolution period is 365.25 days.

• Although the crust, upper mantle, mantle, outer core and inner has specific density at the top and bottom but the average density is 5.52 g/cm³ and mass is 5.97 x 10^24 kg.

• Dead Sea is the lowest point which is located between Israel and Jordan and deepest point is Marian Trench which is also called as Challenger Deep, located in Pacific Ocean which has enormous area 155,557,000 km²

• Earth is the only planet that was not named after a Greek or Roman god or goddess. For example, Saturn was named after the Roman god of agriculture, and Jupiter name came from the King of Roman gods.