GEOGRAPHY Flashcards
What is a planet, according to the International Astronomical Union (IAU)
1) Is in an orbit around the sun
2) Has sufficient mass to assume hydrostatic equilibrium (nearly round shape)
3) Has cleared the neighborhood around
How many planets are there in the solar system according to the IAU?
8
How many dwarf planets are there in the solar system?
5
Which planet orbits the fastest around the Sun?
Mercury
Which planet is the hottest and the brightest?
Venus
Who discovered Hally’s comet?
Edmond Hally
When was Hally’s comet last seen
9th feb 1986
When will smith-tuttle comet collide with India
August 17, 2116
How many satellites make up the Global Positioning System
20
How many satellites does Mercury have
0
How many satellites does Venus have
0
Which planet has the maximum number of satellites
Jupiter
Who were the first to set foot on the Moon?
Neil Armstrong and Edwin Aldrin
When did Neil Armstrong and Edwin Aldrin set foot on the Moon?
20th July 1969
Which is the 5th largest planet in the solar system?
Earth
Which planet is third furthest from the Sun
Earth
What is the shape of Earth?
Oblate Spheroid
What is Earth’s mean distance from the Sun?
1,49,407,000 kms
What is the time taken by Earth to revolve around the Sun
365 days 5 hrs 48 mins and 45.1 seconds
Time taken by earth to rotate on its own axis
23 hrs 56 mins and 4.09 seconds
Define a revolution
Earth revolves around the Sun in an elliptical orbit
It takes 1 year to complete one revolution
This causes change in seasons
Define a rotation
The earth rotates on its own axis from west to east whilst revolving around the Sun
This causes a change in day and night
Where is the duration of day and night equal
At the equator
When does a solar eclipse occur
When the moon is between the sun and the earth
When does a lunar eclipse occur
When the earth is between the sun and the moon
Which is the most abundant gas in the atmosphere
Nitrogen; 78.09%