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All questions of The Earth for Grade 6 Exam

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The Earth rotates from:
  • a)
    East to West  
  • b)
    North to South
  • c)
    South to North
  • d)
    West to East  
Correct answer is option 'D'. Can you explain this answer?

Anjali Gupta answered
The Earth rotates on its own axis and it rotates in the eastward direction and in a counter-clockwise in prograde motion. So the direction of the earth's rotation is considered as from west to east.

The Sun rises in the east and sets in the west. In what direction is the Earth rotating?
  • a)
    East to West  
  • b)
    West to East 
  • c)
    North to South
  • d)
    South to North
Correct answer is option 'B'. Can you explain this answer?

Pranav Singh answered
The earth rotates once in 24 hours. Since the rotation of the earth in the direction from west to east, the moon, sun, and all other celestial bodies appear to move from east to west. This is the reason for which we say the sun rises in the east and sets in the west.

The Earth completes one revolution in:
  • a)
    one hour 
  • b)
    one year
  • c)
    one day
  • d)
    one month
Correct answer is option 'B'. Can you explain this answer?

Anjali Gupta answered
Earth also travels on an elliptical orbit around the Sun. And it takes one year to make a complete trip. In one year Earth makes one revolution around the Sun.

When we observe a ship sailing away from the shore the tower part of the ship disappears first from the sight. Then at last, the flag at the top pole disappears. This is possible only if the Earth is:
  • a)
    round shaped 
  • b)
    zig zag shaped
  • c)
    slate shaped
  • d)
    flat
Correct answer is option 'A'. Can you explain this answer?

Naveen Pillai answered
Explanation:


When a ship sails away from the shore, it appears to go down slowly and gradually. This happens because of the curvature of the Earth's surface. The Earth is round-shaped, and as the ship moves away from the shore, its bottom part disappears first, followed by the middle part, and eventually the top part. This happens because the Earth's surface curves downwards, and eventually, the ship goes below the horizon line.

Proof:


To understand this phenomenon, we can conduct a simple experiment. Take a basketball or any other round object and place a small object on top of it. Now, move the small object away from the center of the basketball. As you move it away, the object will appear to go down, and eventually, it will disappear from sight. This happens because the surface of the basketball curves downwards, just like the surface of the Earth.

Conclusion:


This observation proves that the Earth is round-shaped. If the Earth were flat, the entire ship would remain visible until it went out of sight. However, since the Earth is round, the curvature of its surface causes the ship to disappear gradually as it moves away from the shore.

A group of stars forming a pattern is shown below. Such hind of groups are called:
  • a)
    stars
  • b)
    planets
  • c)
    constellations
  • d)
    groups
Correct answer is option 'C'. Can you explain this answer?

Anjali Gupta answered
A constellation is a group of stars that appears to form a pattern or picture like Orion the Great Hunter, Leo the Lion, or Taurus the Bull. Constellations are easily recognizable patterns that help people orient themselves using the night sky.

Arrange the following in the increasing order of the size. The Earth, the Moon and the Sun,
  • a)
    The Sun - the Moon - the Earth
  • b)
    The Moon - the Sun - the Earth
  • c)
    The Earth - the Moon - the Sun
  • d)
    The Moon - the Earth - the Sun  
Correct answer is option 'D'. Can you explain this answer?

Nilesh Khanna answered
Ascending Order of Size of Earth, Moon, and Sun

The size of celestial bodies is measured in terms of their diameter. The diameter of the Earth, Moon, and Sun are as follows:

- Earth: 12,742 km
- Moon: 3,474 km
- Sun: 1,391,000 km

To arrange them in increasing order of size, we need to start with the smallest and move towards the largest.

1. The Moon
The Moon is the smallest of the three celestial bodies. It has a diameter of 3,474 km.

2. The Earth
The Earth is the second largest of the three celestial bodies. It has a diameter of 12,742 km.

3. The Sun
The Sun is the largest of the three celestial bodies. It has a diameter of 1,391,000 km.

Therefore, the correct order of the size of Earth, Moon, and Sun in ascending order is:

The Moon - The Earth - The Sun (Option D)

The full moon day is also called?
  • a)
    amavasya
  • b)
    purnima  
  • c)
    crescent moon
  • d)
    new moon day
Correct answer is option 'B'. Can you explain this answer?

Sankar Yadav answered
Explanation:

The full moon day is also known as "Purnima" in Hindu mythology. It is one of the most important and auspicious days in the lunar calendar. Purnima is derived from the Sanskrit word "Purnamasi" which means "full moon."

Significance of Purnima:
Purnima holds great significance in various cultures and religions. It is believed to be a time of spiritual growth, enlightenment, and divine blessings. Many religious rituals and festivals are celebrated on this day.

Importance in Hinduism:
In Hinduism, Purnima is considered sacred and is associated with various deities and celestial beings. It is believed that on this day, the moon is in its full glory and radiates positive energy. Some of the major Hindu festivals celebrated on Purnima are:
- Raksha Bandhan: A festival celebrating the bond between brothers and sisters.
- Guru Purnima: A day to honor and express gratitude towards spiritual and academic teachers.
- Sharad Purnima: The full moon day in the month of Ashwin, celebrated with dance and music.

Other Cultures and Beliefs:
Purnima is not just significant in Hinduism but also in other cultures and beliefs. Some examples include:
- Buddhist Purnima: Celebrated as Vesak or Buddha Purnima, commemorating the birth, enlightenment, and death of Gautam Buddha.
- Jain Purnima: Celebrated as Paryushana, a time of self-reflection and spiritual purification for Jains.
- Chinese Purnima: Celebrated as Mid-Autumn Festival, where families gather to admire the full moon and enjoy mooncakes.

Conclusion:
The full moon day is known as Purnima and holds immense cultural, religious, and spiritual significance. It is a time for celebration, reflection, and seeking blessings. Purnima is a beautiful phenomenon observed by people worldwide, connecting them with nature and the celestial realm.

Which of the following is a star?
  • a)
    Sun
  • b)
    Moon
  • c)
    Earth
  • d)
    Comet
Correct answer is option 'A'. Can you explain this answer?

Glitz Classes answered
Answer:
Star:
- A star is a celestial object that generates its own light and energy through nuclear fusion in its core.
- Stars are composed primarily of hydrogen and helium.
- They exist in different sizes, colors, and temperatures.
- Stars can be categorized into different types such as main sequence stars, giant stars, dwarf stars, and supergiant stars.
- The Sun is considered a star.
- It is located at the center of our solar system.
- The Sun is classified as a main sequence star of spectral type G2V.
- It is approximately 4.6 billion years old and will continue to shine for several billion more years.
- The Sun's energy sustains life on Earth through the process of photosynthesis and provides heat and light.
Moon:
- The Moon is Earth's natural satellite.
- It does not generate its own light but reflects the sunlight.
- The Moon orbits around the Earth and takes about 27.3 days to complete one revolution.
- It has phases, such as full moon, new moon, crescent moon, and gibbous moon, depending on its position relative to the Earth and the Sun.
- The Moon has a rocky surface and lacks an atmosphere.
- It influences tides on Earth due to its gravitational pull.
Earth:
- Earth is the third planet from the Sun in our solar system.
- It is a terrestrial planet with a solid surface and an atmosphere.
- Earth is the only known planet to support life.
- It has a diverse range of ecosystems and is home to millions of species.
- Earth has a magnetic field that protects it from harmful solar radiation.
- It takes approximately 365.25 days to complete one revolution around the Sun.
Comet:
- A comet is a small celestial object composed of ice, dust, and rock.
- Comets have a highly elliptical orbit around the Sun.
- When a comet approaches the Sun, the heat causes the ice to vaporize, forming a glowing coma and often a tail.
- Comets are often visible from Earth during their close approach to the Sun.
Conclusion:
- Among the given options, the Sun is the star.
- The Moon is a satellite, Earth is a planet, and a comet is a different type of celestial object.

The only planet with life in the solar system is;
  • a)
    Moon
  • b)
    Sun
  • c)
    Mars
  • d)
    Earth
Correct answer is option 'D'. Can you explain this answer?

Rhea Reddy answered
Earth is the only planet in the universe known to possess life. The planet boasts several million described species, living in habitats ranging from the bottom of the deepest ocean to a few miles up into the atmosphere. Researchers think far more species remain that have yet to be described to science.

The shadow cast by the Earth on the Moon during eclipse is.
  • a)
    shaped  
  • b)
    line shaped
  • c)
    rectangle shaped
  • d)
    round shaped  
Correct answer is option 'D'. Can you explain this answer?

Arnav Nambiar answered
The shadow cast by the Earth on the Moon during an eclipse is round shaped.

Eclipses occur when one celestial body moves into the shadow of another. In the case of a lunar eclipse, the Earth moves between the Sun and the Moon, casting a shadow on the Moon's surface. This shadow is responsible for the darkening or reddening of the Moon during an eclipse.

1. The Earth's Shadow
The Earth's shadow has two parts: the penumbra and the umbra. The penumbra is the outer part of the shadow and is not completely dark. It gradually gets darker towards the center, where the umbra begins. The umbra is the inner part of the shadow and is completely dark.

2. Shape of the Earth's Shadow
The shape of the Earth's shadow is round. This is because the Earth is a spherical shape, and when it blocks the Sun's light, it creates a circular shadow. The curvature of the Earth determines the shape of the shadow.

3. Projection onto the Moon
When the Earth casts its shadow onto the Moon during a lunar eclipse, the round shape of the shadow is projected onto the Moon's surface. This is why during a total lunar eclipse, we see a perfectly round shadow covering the Moon. The shadow may appear slightly distorted due to the irregularities on the Moon's surface, but overall, it retains its round shape.

4. Variation in Shadow Size
The size of the Earth's shadow on the Moon can vary during different stages of an eclipse. At the beginning and end of a lunar eclipse, when the Moon is partially in the Earth's shadow, the shadow may appear slightly elongated. However, during a total lunar eclipse, when the Moon is fully within the umbra, the shadow takes on a more distinct and round shape.

In conclusion, the shadow cast by the Earth on the Moon during an eclipse is round shaped. This is due to the Earth's spherical shape and the projection of its shadow onto the Moon's surface.


Above diagram of Earth represents:
  • a)
    rotation   
  • b)
    revolution
  • c)
    formation of days and nights
  • d)
    formation of planets
Correct answer is option 'A'. Can you explain this answer?

Pranav Singh answered
A rotation is a circular movement of an object around a center of rotation. The geometric plane along which the rotation occurs is called the rotation plane, and the imaginary line extending from the center and perpendicular to the rotation plane is called the rotation axis.

The imaginary line dividing the Earth into two halves is tailed:
  • a)
    equator 
  • b)
    half line
  • c)
    orbit
  • d)
    path
Correct answer is option 'A'. Can you explain this answer?

Anjali Gupta answered
An equator is an imaginary line around the middle of a planet or other celestial body. It is halfway between the North Pole and the South Pole, at 0 degrees latitude. An equator divides the planet into a Northern Hemisphere and a Southern Hemisphere.

Which of these shapes does the Moon never take?
  • a)
  • b)
  • c)
  • d)
Correct answer is option 'D'. Can you explain this answer?

Anjali Gupta answered
As the Moon moves around Earth in its orbit, the light reflecting off the side of the Moon creates a sliver of shape. This is a crescent moon. Because it's getting bigger, we can also call it the waxing crescent moon.

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