Science General · Geography

Astronomy and Celestial Phenomena

1,884 Questions

This section provides practice questions on astronomy and celestial phenomena, focusing on eclipses, planetary movements, and tides. These concepts are commonly tested in general science sections of various competitive exams. Use this hub to practice questions related to the Earth, Moon, and solar system dynamics.

Solar and lunar eclipsesEquinoxes and solsticesPlanetary movementsOcean tidesCoriolis effectMeteor showers

Astronomy and Celestial Phenomena Questions

Multiple choice geography our changing earth earthquake earthquakes earth's movement and creation of landforms

Earth takes 365 days to ___________.

  1. Rotate around the sun

  2. Rotate around itself

  3. Revolve around the sun

  4. Revolve around itself
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Earth takes about 365 1/4 days to revolve around the sun. As we take 365 days for a year, the difference of 1/4 of a day requires adjustment. This is why we add one day to February every four years.

Multiple choice geography the signature of time movement of the earth's plates development of landforms study of continents - north america biosphere and landscape

The cycle of season is caused by _________________.

  1. the varying distances between the Earth and the Sun

  2. the spherical shape of the Earth

  3. the tilt of the earth's axis

  4. the presence of plants and animals
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

C. The tilt of Earths Axis

Seasons happen because Earth's axis is tilted at an angle of about 23.4 degrees and different parts of Earth receive more solar energy than others. Because of Earth's axial tilt, different areas of Earth point toward or away from the Sun at different times of the year. Around the June solstice, the North Pole is tilted toward the Sun and the Northern Hemisphere gets more of the Sun's direct rays. This is why June, July and August are summer months in the Northern Hemisphere. At the same time, the Southern Hemisphere points away from the Sun, creating winter during the months of June, July and August. Summer in the Southern Hemisphere is in December, January, and February, when the South Pole is tilted toward the Sun and the Northern Hemisphere is tilted away.

Multiple choice geography the signature of time movement of the earth's plates development of landforms study of continents - north america biosphere and landscape

Sequence of positions during solar eclipse is ________________.

  1. Sun, Earth and Moon

  2. Earth, Sun and Moon

  3. Sun, Earth and Planet

  4. Sun, Moon and Earth
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
As seen from the Earth, a solar eclipse is a type of eclipse that occurs when the Moon passes between the Sun and Earth, and the Moon fully or partially blocks the Sun. This can happen only at new moon when the Sun and the Moon are in conjunction as seen from Earth in an alignment. In a total eclipse, the disk of the Sun is fully obscured by the Moon. In partial and annular eclipses, only part of the Sun is obscured.
Multiple choice geography the signature of time movement of the earth's plates development of landforms study of continents - north america biosphere and landscape

Natural satellite of the earth is completely under the shadow during the ____________.

  1. Lunar eclipse

  2. Solar eclipse

  3. Any eclipse

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
A lunar eclipse occurs when the Moon passes directly behind the Earth into its umbra (shadow). This can occur only when the sun, Earth, and moon are aligned in the same line, with the Earth in the middle. Generally, a lunar eclipse occur only in the night of a full moon.
A total lunar eclipse has the direct sunlight completely blocked by the earth's shadow. The only light seen is refracted through the earth's shadow. 
Multiple choice geography the signature of time movement of the earth's plates development of landforms study of continents - north america biosphere and landscape

Lunar eclipse happen only on a ___________.

  1. half moon night

  2. no moon night

  3. full moon night

  4. none of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
A lunar eclipse occurs when the Moon passes directly behind the Earth into its umbra (shadow). This can occur only when the sun, Earth, and moon are aligned in the same line, with the Earth in the middle. Generally, a lunar eclipse occur only in the night of a full moon.
A total lunar eclipse has the direct sunlight completely blocked by the earth's shadow. The only light seen is refracted through the earth's shadow. 
Multiple choice geography the signature of time movement of the earth's plates development of landforms study of continents - north america biosphere and landscape

For a lunar eclipse to occur, the sun, earth and the moon have to come in a straight line with the earth in the middle.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
A lunar eclipse occurs when the Moon passes directly behind the Earth into its umbra (shadow). This can occur only when the sun, Earth, and moon are aligned exactly, or very closely so, with the Earth in the middle. Hence, a lunar eclipse can occur only the night of a full moon. 

The type and length of an eclipse depend upon the Moon's location relative to its orbital nodes.A total lunar eclipse has the direct sunlight completely blocked by the earth's shadow. The only light seen is refracted through the earth's shadow. 
Multiple choice geography the signature of time movement of the earth's plates development of landforms study of continents - north america biosphere and landscape

Vishal was watching the Moon during a total lunar eclipse. Slowly the entire Moon became dark and invisible. At this. point Vishal can assume that _______________.

  1. Earth has come in between the Sun and the moon

  2. Sun has blocked the view of the Moon

  3. Moon has come in between the Sun and the Earth

  4. Moon has stopped producing light
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A lunar eclipse occurs when the Moon passes directly behind the Earth into its umbra (shadow). This can occur only when the sun, Earth, and moon are aligned exactly, or very closely so, with the Earth in the middle. Hence, a lunar eclipse can occur only the night of a full moon. The type and length of an eclipse depend upon the Moon's location relative to its orbital nodes.

A total lunar eclipse has the direct sunlight completely blocked by the earth's shadow. The only light seen is refracted through the earth's shadow. This light looks red for the same reason that the sunset looks red. Because of its reddish color, a total lunar eclipse is sometimes called a blood moon.

Multiple choice geography the signature of time movement of the earth's plates development of landforms study of continents - north america biosphere and landscape

At any given time, different parts of the earth experience different seasons. Apart from the earth's revolution around the Sun, which of these is the reason for this?

  1. The earth's rotation

  2. The elliptical shape of the earth's orbit

  3. The presence of the moon

  4. The tilt of the earth's axis of rotation
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

D. The tilt of the earth's axis of rotation

Seasons happen because Earth's axis is tilted at an angle of about 23.4 degrees and different parts of Earth receive more solar energy than others. Because of Earth's axial tilt (obliquity), our planet orbits the Sun on a slant which means different areas of Earth point toward or away from the Sun at different times of the year. Around the June solstice, the North Pole is tilted toward the Sun and the Northern Hemisphere gets more of the Sun's direct rays. This is why June, July and August are summer months in the Northern Hemisphere. At the same time, the Southern Hemisphere points away from the Sun, creating winter during the months of June, July and August. Summer in the Southern Hemisphere is in December, January, and February, when the South Pole is tilted toward the Sun and the Northern Hemisphere is tilted away.

Multiple choice geography the signature of time movement of the earth's plates development of landforms study of continents - north america biosphere and landscape

It is suggested not to look at the sun directly during eclipse. Because ____________________.

  1. It would damage our skin

  2. It would damage our hair

  3. It would damage our eyes

  4. It would damage every part of the body
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Solar eclipses are dangerous because the sun can come out from behind the moon and surprise you before you have a chance to look away. And this is actually even worse than when you normally look away from the sun because during the total eclipse, it is dark out, and your pupil therefore dialates so that it can let in enough light to get a good picture. Then, when the sun reappears and starts flooding the area with really bright light, not only are you staring straight at it, but your eye is in a state where it is wide open, and actively trying to let in as much light as possible.

This explains why it is easy to damage your eye when watching a total solar eclipse, and why you should either be sure to time it very carefully or just view the thing through one of those sets of cheap dark glasses they sell for the express purpose of looking at the sun without getting hurt.

Multiple choice geography study of continents - north america movement of the earth's plates development of landforms the signature of time

During solar eclipse which of the following comes in the middle?

  1. Sun

  2. Moon

  3. Earth

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

As seen from the Earth, a solar eclipse is a type of eclipse that occurs when the Moon passes between the Sun and Earth, and the Moon fully or partially blocks the Sun. This can happen only at new moon when the Sun and the Moon are in conjunction as seen from Earth in an alignment. In a total eclipse, the disk of the Sun is fully obscured by the Moon. In partial and annular eclipses, only part of the Sun is obscured.

Multiple choice chemistry phenomena around us changes and its classification types of changes classification of changes

What's common among motion of the planets around the sun, blinking of traffic lights and motion of blades of a fan rotating at uniform speed?

  1. Irreversible changes

  2. Chemical changes

  3. Periodic changes

  4. Undesired changes
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The planets around the sun, blinking of traffic lights and motion of blades of a fan rotating at uniform speed are all periodic changes.
Changes which are repeated after regular intervals are called periodic changes.

Multiple choice chemistry phenomena around us changes and its classification types of changes classification of changes

Halley's comet revolves around the sun once in every 76 Years. This is a:

  1. photochemical change

  2. periodic change

  3. chemical change

  4. irreversible change
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

It is a periodic change $-$ because changes that occur after a fix interval of time is known as periodic change.

Here periodic change in $76$ years
photochemical change is due to light chemical change $-$ where reactant react to produce products.

Multiple choice geography in search of the source of wind variations in atmospheric pressure properties of air pressure belts the concept of bernoulli's principle air exerts pressure

The doldrums are in the _______________.

  1. Horse latitudes

  2. Sub-polar low pressure belt

  3. Equatorial low pressure belt

  4. Asteroid belt
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Due to the intense heating from sun rays around the equator, the air in this region gets hot and hence ascends upwards, thus creating a low pressure in the region. Hence it is the equatorial low-pressure belt and is also called doldrums as it is the region of extreme calmness, not as much as a breeze.