Tag: evs

Questions Related to evs

Fill  in the blank:

The smallest part of the moon that appears in the sky is called ________.

evs sun and planets moon the moon's path in the sky the moon

  1. full moon

  2. half moon

  3. crescent moon

  4. quarter moon

Show answer
Correct Option: C
Explanation:

The smallest part of visible moon is called crescent moon. It appears after and before the new moon day. This occurs because of continuous change in the shape of the bright part of the moon. This change is called phases of the moon.

Why can life not exist on Moon?

evs sun and planets moon the moon's path in the sky the moon

  1. Moon is very far from the Earth.

  2. There is no atmosphere and water on the Moon.

  3. Moon is a satellite of the Earth.

  4. The time taken for one rotation and one revolution of the Moon is same.

Show answer
Correct Option: B
Explanation:

For life to exist, water is very essential. However, there is no water as well as no atmosphere on the Moon. Hence, life cannot exist on Moon.

Fill in the blank:

The size of the visible part of the Moon _______ gradually after the full moon day till the new moon day.

evs sun and planets moon the moon's path in the sky the moon

  1. remains the same

  2. increases

  3. decreases

  4. either increases or decreases

Show answer
Correct Option: C
Explanation:

Moon revolves around the Earth from East to West. Along with the Earth it also revolves around the Sun. Moon does not have its own light. Hence, we can see only that part of the moon that is illuminated by the Sun. When the moon is in the East, it lies somewhere between the Earth and the Sun. Thus the illuminated part faces the Sun and the dark part faces the Earth. Thus we cannot see any moon in the sky. This is the new moon day. After this, gradually the Moon starts moving towards the West through North. As it moves in this path, the illuminated part of the Moon gradually faces the Earth and we see the phases of the Moon from new moon, to crescent moon. Then half moon, and finally the full moon, when it reaches the West, in the West, the entire illuminated part of the moon faces the Earth and it is the full moon day. Then moon gradually starts moving towards the east once again through south and the visible part of the moon goes on decreasing in the same manner until the new moon day and the cycle keeps repeating itself. Thus we see the phases of Moon. It takes 15 days for the moon from new moon day to full moon day and another 15 days from full moon day to new moon day.

How is the Moon's surface?

evs sun and planets moon the moon's path in the sky the moon

  1. Smooth

  2. Flat

  3. Fertile

  4. Dusty and barren

Show answer
Correct Option: D
Explanation:

The surface of the moon according to the astronauts is dusty and barren.

Fill in the blanks:

_________ was the first man to land on Moon on ________.

evs sun and planets moon the moon's path in the sky the moon

  1. Edwin Aldrin, July 21, 1970

  2. Neil Armstrong, July 21, 1896

  3. Neil Armstrong, July 21, 1969

  4. Edwin Aldrin, July 21, 1966

Show answer
Correct Option: C
Explanation:

Neil Armstrong was the first astronaut to land on Moon on July 21, 1969 as per Indian time.

Surface of the Moon is

evs sun and planets moon the moon's path in the sky the moon

  1. dusty and barren.

  2. having many craters and mountains.

  3. rough and irregular.

  4. as all of the above.

Show answer
Correct Option: D
Explanation:

According to the astronauts the surface of the Moon is rough, dusty, barren and irregular. It has large craters on its surface and many steep and high mountains.

The large grouping of stars, dust and gas held together by gravity are called:

evs sun and planets moon the moon's path in the sky the moon

  1. Galaxies

  2. Nebulae

  3. Pulse

  4. Comets

Show answer
Correct Option: A
Explanation:

Galaxies are large grouping of stars, dust and gas held together by gravity.
Nebulae : cosmic element of gas
Pulse: The rapidly pulse
Comets: Left ones from formation of planetary system

If new moon day is day $1$, then what is the day when half of the moon is visible?

evs sun and planets moon the moon's path in the sky the moon

  1. $10$

  2. $3$

  3. $7$

  4. $14$

Show answer
Correct Option: C
Explanation:

If new moon day is day $1$, then-

Day $3$ - Crescent moon
Day $7$ - Half moon
Day $10$ - Gibbous moon (or waxing)
Day $14$ - Full moon

If new moon day is day $1$, then what is the day of the crescent moon?

evs sun and planets moon the moon's path in the sky the moon

  1. $7$

  2. $10$

  3. $3$

  4. $14$

Show answer
Correct Option: C
Explanation:

If new moon day is day $1$, then:

Day $3$ - Crescent moon
Day $7$ - Half moon
Day $10$ - Gibbous moon (or waxing)
Day $14$ - Full moon

sky appears blue because of 

evs option d: astrophysics moon the moon's path in the sky the moon

  1. Total Internal

  2. Scattering

  3. Refraction

  4. Total internal reflection

Show answer
Correct Option: B
Explanation:

Sky appears blue because of Scattering.Blue light is scattered in all directions by the tiny molecules of air in Earth's atmosphere. Blue is scattered more than other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time.


Therefore, B is correct option.