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CBSE Questions for Class 6 Geography Motions Of The Earth Quiz 1 - MCQExams.com
CBSE
Class 6 Geography
Motions Of The Earth
Quiz 1
In which of the following year the month of February gets 29 days?
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Solar year
0%
Lunar year
0%
Leap year
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Light year
The earth moves around the sun at a speed of about ___________.
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20 km/sec
0%
30 km/se
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35 km/sec
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40 km/sec
The earth while orbiting makes various angles with the sun's rays. On 22nd December, the rays are vertical on earth at _______.
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$$23 {\frac {1}{2}}^o$$
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$$30^o$$ North
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$$23 {\frac {1}{2}}^o$$ South
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$$30^o$$ South
Explanation
Sun rays falling vertically move between 23 and 1/2 degrees north and 23 and 1/2 degrees south latitudes throughout the year. On 22nd december, the sun rays fall vertically at the 23 1/2 degrees south.
The speed of revolution of the Earth in its orbit round the Sun is _______________.
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same throughout the year
0%
greatest when the earth in nearest to the sun
0%
greatest when the earth in farthrest from the Sun
0%
least when the earth is nearest to the Sun
Explanation
The Earth travels about 107,000 kilometers per hour. This means that our planet moves around the Sun at an average speed of 30 kilometers per second. Earth's speed is not constant as the Earth has an elliptical orbit. When the Earth is the closest to the Sun (perihelion), it moves the fastest.
The fixed path along which the earth revolves is round the sun is called ___________.
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The celestial sphere
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The elliptic path
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The ecliptic plane
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The earth's orbit
Explanation
The celestial sphere is the imaginary sphere drawn by taking radius concentric to the radius of the Earth, on which all the objects of the sky are placed.
The elliptic path is the path that is followed by all the planets during the revolution around the Sun.
The plane of Earth's orbit around the Sun is known as the ecliptic plane.
The fixed path along which the Earth revolves is round the Sun is called Earth's orbit.
Tick the correct answer.
Direct rays of the sun fall on the equator on
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21 March
0%
21 June
0%
22 December
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None of these
Explanation
On 21st March and September 23rd,
direct rays of the sun fall on the equator
. At this position, neither of the poles is tilted towards the
sun
; so, the whole earth experiences equal days and equal nights. This is called an equinox.
During rotation of the earth, the parts of the earth which face the sun have ________.
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day
0%
night
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morning
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evening
Explanation
The earth receives light from the sun. Due to the spherical shape of the earth, only half of it gets light from the sun at a time. During rotation, the portion of earth facing the sun experiences day while the other half away from the sun experiences night.
Tick the correct answer.
The movement of the earth around the sun is known as
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Rotation
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Revolution
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Inclination
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None of these
Explanation
Revolution
Direction, inclination of axis and speed are the characteristic of the _____________.
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rotation
0%
revolution
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inclination
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none of these
Explanation
In astronomy, axial
tilt
, also known as obliquity, is the
angle
between an object's
rotational axis
and its orbital
axis
, or, equivalently, the
angle
between its equatorial plane and orbital plane.
It differs from orbital
inclination
.
At an obliquity of zero, the two
axes
point in the same
direction
; i.e., the
rotational axis
is perpendicular
to the orbital plane.
Earth's axis remains tilted in the same direction with reference to the background stars throughout a year .
Like Earth, all of the rocky planets have a small precessional rotation of their spin axis.
A
rotation
is a circular movement of an object around a center (or point) of rotation .
A three-dimensional object always rotates around an imaginary line called a rotation axis.
If the axis passes through the body's center of mass, the body is said to rotate upon itself, or spin.
The speed of rotation is given by the angular frequency
(rad/s) or frequency
( turn
/s, turns per minute), or p
eriod
(seconds, days, etc.).
The speed of earth's rotation at the equator is ______________ km per hour.
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16650
0%
1562
0%
1670
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none of these
Explanation
Speed of the Earth's Rotation at the Equator:
Circumference of the Earth at the Equator =
40,000 kilometers
Time to complete one Rotation =
24 hours
Speed of Rotation = Distance/Time = 40,000 km / 24 hr =
1670 km/hr.
The speed of earth's rotation decreases towards the ___________.
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equator
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poles
0%
sector
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none of these
Explanation
The Earth as a whole rotates 360 degrees once every 24 hours.
This rotation is responsible for the appearance of the sun “rising” in the East and “setting” in the West.
The surface speed of the Earth’s rotation at the top -- technically known as the geographic North Pole -- is slower than that of the vast majority of other places on the planet but equal to that of one other terrestrial location.
The Earth rotates fastest at the equator, and slowest -- essentially, not at all -- at the top and bottom, with the rotation speed at the middle latitudes falling somewhere in between these two extremes.
The summer solstice in northern hemisphere occurs when the sun is directly overhead at noon on
_________________.
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The Tropic of Capricorn
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The Tropic of Cancer
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The equator
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None of the above
Explanation
The summer solstice in the northern hemisphere occurs when the Sun is directly overhead at noon on the Tropic of Cancer. The summer solstice happens on 21 June. This day has the longest daylight time.
Which of the followings is the shortest day in the southern hemisphere?
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March 21
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June 21
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September 22
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December 23
Explanation
On 21 June sun rays fall vertically over the Tropic of Cancer. This position of the Earth is called Summer Solstice. On this day, it is considered the longest daylight time in Northern Hemisphere but in Southern Hemisphere, it is considered as the shortest daylight time.
A year was fixed as the time taken by the earth to complete one revolution of the______
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Moon
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Sun
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Both (A) and (B)
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None of these
Explanation
Earth
spins around its axis, just as a top spins around its spindle. This spinning movement is called
Earth's rotation
. At the same time that the
Earth
spins on its axis, it also orbits, or revolves around the Sun. This movement is called
revolution
.
__________ are caused by the rotation of the earth on its axis.
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Day and night
0%
Morning and night
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Evening and night
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none of these
Explanation
The Earth experiences days and nights as a result of the planet spinning on its axis.
As the planet spins, the part that is facing the sun experiences day, while it is a night for the part facing away from the sun.
The alternation between day and night is caused by the rotation of the Earth on its axis.
If the Earth did not rotate as it does, the day/night cycle would be very different or possibly even nonexistent.
Earth take 365 days to ________________.
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Rotate around the sun
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Rotate around itself
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Revolve around the sun
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Revolve around itself
Explanation
The motion of the earth around the sun in its orbit is called revolution. It takes earth 365 days (one year) to revolve around the sun.
There is a continuous daylight at the South Pole during the ______________.
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Autuman equinox
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Spring equinox
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Summer solstice
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Winter solstice
Explanation
The winter solstice falls on 22nd December during which there is continuous daylight on the South pole and continuous darkness at the North pole. Hence option D is correct.
During summer solstice i.e. 21st June, there is continuous daylight at the North pole.
Equinox refers to an equal period of darkness and daylight.
The position of the earth on $$21st$$ June is called ______________.
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Autumn equinox
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Spring equinox
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Winter solstice
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Summer solstice
Vernal Equinox occurs on ?
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Feb 15
0%
Feb 21
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March 15
0%
March 20
The route in which the earth moves around the sun is called the __________.
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axis
0%
road
0%
orbit
0%
path
Explanation
The Earth spins on its axis and revolves around the Sun in a particular route which is known as orbit. An orbit is a regular, repeating path that one object in space takes around another one. Earth orbits the Sun once in every 365.25 days.
The correct option is C.
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