Tag: sun and planets

Questions Related to sun and planets

After the period of how many days half moon can be seen?

evs sun and planets phases of moon moon and it's phases moon

  1. $7$ or $22$ days

  2. $1$ or $30$ days

  3. $15$ days

  4. $10$ or $17$ days

Show answer
Correct Option: A
Explanation:

Half moon are the phase when only half surface of moon is visible. It exist at about $7$ days and $22$ days.

At $15$ day the full moon is seen.

Which of the following is a consequence of the fact that the rotation and revolution periods of the moon are the same?

evs sun and planets phases of moon moon and it's phases moon

  1. The moon keeps the same face turned toward the earth

  2. The moon can never be seen from one hemisphere of the earth

  3. All lunar phases can be seen from the earth

  4. There are about 12 months per year

Show answer
Correct Option: A
Explanation:

The rotation or revolution period is the time taken by an object to complete one rotation or revolution respectively.

The answer to this question can be explained only with the help of the following experiment.
Stand straight and hold a ball in front of your face.

Tell your friend to stand just like you, facing your front.
Keeping the ball in front of your face, turn your entire body by 90 degrees.
But your friend should not make any movements.
You will notice that, here, the ball has traveled a path of a quarter circle.
You will also notice that the part of the ball which was in the front of your friend is now on his/her right side.
This shows that the ball has turned around itself by a quarter of one full rotation.
You will notice similar phenomena if you turn by 180 degrees, 270 and 360.
This show that in fixed intervals of time, the angular displacement of rotation and that of revolution of the are equal.
The motion of the moon around the earth is same as that of the ball in the above experiment.
Hence the rotation and revolution periods of the moon are the same and as a result the moon keeps the same face turned towards the earth.

What kind of eclipse do we see when the moon is entirely within the Earth's umbral shadow?

evs sun and planets phases of moon moon and it's phases moon

  1. Partial lunar

  2. Total solar

  3. Total lunar

  4. Partial solar

Show answer
Correct Option: C
Explanation:

Solar Eclipse are of $4$ types.

$\longrightarrow $ Total Eclipse [occurs only at umbral shadow
$\longrightarrow $ Partial Eclipse
$\longrightarrow $ Annular Eclipse
$\longrightarrow $ Hybrid Eclipse
Since moon is in shadow its going to be lunar eclipse.
Total lunar is the answer.

In which of the following phases of Moon we can see the entire half of the moon surface that is lit?

evs sun and planets phases of moon moon and it's phases moon

  1. Full Moon

  2. New Moon

  3. Waning Gibbous

  4. Last Quarter

Show answer
Correct Option: A
Explanation:

This happens when Earth is between the moon and Sun and this phase is known as full moon.

During a New moon phase, what is the configuration of Moon, Earth, and Sun?

evs sun and planets phases of moon moon and it's phases moon

  1. Moon is between Earth and Sun.

  2. Sun is between Moon and Earth.

  3. Earth is between Moon and Earth.

  4. They are not in a straight line.

Show answer
Correct Option: A
Explanation:

New moon refers to the phase when we are not able to see the moon, as moon does not have its own source of light this could happen when sun illuminates the surface of the moon which we do not see that happen. When Sun,  Earth and Moon are in line and Moon is between Earth and Sun.

A waxing crescent moon

evs sun and planets phases of moon moon and it's phases moon

  1. is a phase where in the crescent increases from one day to another

  2. is a phase where in the crescent decreases from one day to another

  3. is a phase where in the next day to the crescent is a new moon day

  4. is a phase where in the next day to the crescent is a full moon day

Show answer
Correct Option: A
Explanation:

A waxing crescent moon is when the Moon looks like crescent and the crescent increases ("waxes") in size from one day to the next. This phase is usually only seen in the west.

When is the moon nearest to Earth during its orbit?

evs sun and planets phases of moon moon and it's phases moon

  1. At apogee

  2. At perihelion

  3. During an eclipse

  4. During perigee

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Correct Option: D

Approximately how long does it take for the moon to go through all of its phases ?

evs sun and planets phases of moon moon and it's phases moon

  1. $24\ hours$

  2. $12\ hours$

  3. $30\ hours$

  4. $365\ hours$

Show answer
Correct Option: D
Coumn-I Column-II
(1) New moon (a) Rises around midnight and sets around noon
(2) First quarter moon (b) Rises at sunset and sets at sunrise
(3) Full moon (c) Rises around sunrise and sets around sunset.
(4) Third quarter moon (d) Rises around noon and sets around midnight
evs sun and planets phases of moon moon and it's phases moon

  1. (1) $\rightarrow$ c; (2) $\rightarrow$ d; (3) $\rightarrow$ b; (4) $\rightarrow$ a.

  2. (1) $\rightarrow$ c; (2) $\rightarrow$ d; (3) $\rightarrow$ b; (4) $\rightarrow$ d.

  3. (1) $\rightarrow$ c; (2) $\rightarrow$ d; (3) $\rightarrow$ b; (4) $\rightarrow$ c.

  4. (1) $\rightarrow$ c; (2) $\rightarrow$ d; (3) $\rightarrow$ b; (4) $\rightarrow$ b.

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Correct Option: A

Fill in the blanks:

The period between two consecutive new moon days is _______ and is called a _______.

evs sun and planets phases of moon moon and it's phases moon

  1. $31$ days, month

  2. $7$ days, week

  3. $15$ days, fortnight

  4. slightly longer than $29$ days, month

Show answer
Correct Option: D
Explanation:

The time taken for one revolution of moon is a few hours longer than 29 days. But for ease of calculation, these hours have been divided amongst the months to give us months having 30 and 31 days. It takes one complete revolution of the moon around the Earth to have the next new moon day after the previous one. This period is called a month.