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Eclipses - class-VI

Description: eclipses
Number of Questions: 30
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Tags: light and shadow physics effects of light gravitation
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What is known as an eclipse?

  1. Astronomical event when one celestial body partially or totally cover another celestial object

  2. Astronomical event when one celestial body cover another meteor

  3. Astronomical event when one meteor partially or totally cover another meteor

  4. None


Correct Option: A
Explanation:

An eclipse is an event where one heavenly body compeletely or partially blocks the light from the other heavenly body.

Which type of eclipse is known when Earth, Moon and Sun doesn't align in straight line and Moon only partially covers sun?

  1. Total Solar Eclipse

  2. Partial Solar Eclipse

  3. Annular Solar Eclipse

  4. None


Correct Option: B
Explanation:

When Moon is between the Sun and the Earth but doesn't align in a straight line results in a partial solar eclipse.

Partial Solar Eclipse is known when Earth, Moon and Sun doesn't align in straight line and Moon only partially covers sun.

State whether the given statement is true or false :

Looking at a solar eclipse without any protective eyewear can severely harm your eyes. 

  1. True

  2. False


Correct Option: A
Explanation:

Looking at a solar eclipse without any protective eyewear can severely harm your eyes. It is safe to look at the Sun during the total solar eclipse since Moon cover the Sun totally. However, it is not safe to look at the Sun during solar eclipse, other than the total solar eclipse.

What is solar eclipse?

  1. When Earth, Moon and Sun form a straight line

  2. When Earth, Moon and Sun form a Cross line

  3. When Earth, Moon form a straight line

  4. None


Correct Option: A
Explanation:

Solar eclipse is the event where the light form the Sun is blocked by the Moon, when Moon passes between the Sun and the Earth and all three forms a straight line.

During partial lunar eclipse, the Moon is in the _______ partially.

  1. penumbra core

  2. umbra core

  3. neither A nor B

  4. both A and B


Correct Option: D
Explanation:

During partial lunar eclipse, moon is in the penumbra core partially and rest is in the umbra core.

Lunar eclipse is very less common phenominon.

Why should you not see the solar eclipse directly?

  1. Sun rays are very strong and may cause damage to eyes

  2. Sun rays are weak and may cause strain on your eyes

  3. Sun rays are very strong and may cause a burn on skin.

  4. Sunlight refracts in eclipse and intensity is increased


Correct Option: A
Explanation:

Direct rays of sun are very strong. 

Looking at it directly may cause severe damage to eyes because of high intensity.

When does total solar eclipse occur?                     

  1. When Moon completely covers Sun as seen from earth

  2. When Sun completely covers Moon as seen from earth

  3. When Earth completely covers Sun as seen from moon

  4. None


Correct Option: A
Explanation:

Total solar eclipse occurs when the Moon is between the Sun and the Earth, and an umbra is cast by the Moon on the Earth's surface.

Which eclipse is known as when Earth's umbra-central dark part shadow obscures all of Moon's visible surface?

  1. Hybrid

  2. Total

  3. Partial

  4. Penumbral


Correct Option: B
Explanation:

Earth cast a shadow on the Moon in a lunar eclipse. Earth's shadow are of 2 types: umbra and penumbra. The darkest or the total shadow is the umbra while the partial shadow is the penumbra. Total eclipse occurs when the Moon is the umbra region.

When does lunar eclipse occurs?

  1. When Earth comes between Sun and moon

  2. When Sun comes between Earth and moon

  3. When Moon comes between Sun and Earth

  4. When Earth comes between Star and moon


Correct Option: A
Explanation:

Lunar eclipse occurs when Moon pass from the behind the Earth or when Earth is betwen the Sun and the Moon. Earth blocks the light of the Sun that would have fallen on the Moon.


State whether the given statement is True or False :

A partial lunar eclipse can be observed when only part of the Moon's visible surface is obscured by the Earth's umbra. 

  1. True

  2. False


Correct Option: A
Explanation:

Earth cast a shadow on the Moon in a lunar eclipse. Earth's shadow are of 2 types: umbra and penumbra. The darkest or the total shadow is the umbra while the partial shadow is the penumbra. Partial lunar eclipse occurs when a part of the Moon is in the umbra region.

Fill in the blank:

Lunar eclipse is a _______ phenomenon.

  1. common

  2. less common

  3. impossible

  4. regular


Correct Option: B
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 only occur the night of a full moon. The type and length of an eclipse depend upon the Moon's location relative to its orbital nodes.
Unlike a solar eclipse, which can only be viewed from a certain relatively small area of the world, a lunar eclipse may be viewed from anywhere on the night side of the Earth. A lunar eclipse lasts for a few hours, whereas a total solar eclipse lasts for only a few minutes at any given place, due to the smaller size of the Moon's shadow. 
Every year, there are at least two lunar eclipses and as many as five, although total lunar eclipses are significantly less common. 

The lunar eclipse is generally :  

  1. partial

  2. total

  3. either (a) or (b)

  4. cannot say


Correct Option: B

A solar eclipse can occur only on a -

  1. new moon day

  2. full moon day

  3. half moon day

  4. none of these


Correct Option: A
Explanation:

Solar eclipse can occur only on a new moon day & a lunar eclipse can occur only on the night of a full moon.

Ans: new moon day

When the sun, the earth and the moon come to lie in a straight line it causes -

  1. earthquakes

  2. eclipses

  3. eruption of volcanoes

  4. none of these


Correct Option: B
Explanation:

When the sun, earth and moon come in straight line it causes eclipses.

Ans : Eclipse

A solar eclipse is caused when the -

  1. sun comes between the earth and the moon

  2. moon comes between the sun and the earth

  3. earth comes between the sun and the moon

  4. none of these


Correct Option: B
Explanation:

A solar eclipse is caused when moon comes between sun and earth and moon casts a shadow over earth. 

Ans: moon comes between sun and earth

State whether true or false.
The outer rim of the sun which is only visible in an annular solar eclipse is called corona.

  1. True

  2. False


Correct Option: A
Explanation:

The outer rim of the sun which is visible in an annular solar eclipse is called corona.

Ans:True

State whether true or false.
Eclipses are examples of the formation of shadows in nature.

  1. True

  2. False


Correct Option: A
Explanation:

Lunar eclipse occur whenever the moon passes into the shadow of earth. Solar eclipse occur when the new moon eclipse slips in front of the sun and blocks it from view. This moon's shadow then falls upon the earth.

State whether true or false.
The sun will not be visible during a lunar eclipse.

  1. True

  2. False


Correct Option: A
Explanation:

During lunar eclipse position of sun and moon will be in the same line. In this configuration both sun and moon will not be visible.

Ans: True

State whether true or false.
Solar eclipse takes place when Jupiter comes in between the earth and the moon.

  1. True

  2. False


Correct Option: B
Explanation:

Solar eclipse occurs when moon comes between earth and sun.

Ans: False

State whether true or false.
Solar eclipse is a phenomenon more frequent than a Lunar eclipse.

  1. True

  2. False


Correct Option: B
Explanation:

Lunar eclipses are more common than solar eclipse.

State whether true or false.
Solar eclipse takes place on a half moon day.

  1. True

  2. False


Correct Option: B
Explanation:

Solar eclipse takes place only on a new moon day.

State whether true or false.
Lunar eclipse occurs in every full moon night.

  1. True

  2. False


Correct Option: B
Explanation:

Lunar eclipse can occur only on a full moon night. But they do not happen every full moon night because Earth's orbit around the sun is not in the same plane as the moon's orbit around the earth. Eclipse occur only if the the sun, the earth and the moon come to lie in a straight line.

State whether true or false.
There are only two types of eclipses Solar and Lunar eclipse

  1. True

  2. False


Correct Option: A
Explanation:

The only two types of solar eclipse are Solar and Lunar eclipse. 

Ans: True

A lunar eclipse can occur only on a -

  1. new moon day

  2. full moon night

  3. half moon day

  4. none of these


Correct Option: B
Explanation:

A lunar eclipse can occur only on a full moon light.

Ans: full moon day

Which eclipse is known when the Moon travels through the faint penumbral portion of the Earths shadow.?

  1. Total

  2. Partial

  3. Penumbral

  4. Hybrid


Correct Option: C
Explanation:

Earth cast a shadow on the Moon in a lunar eclipse. Earth's shadow are of 2 types: umbra and penumbra. The darkest or the total shadow is the umbra while the partial shadow is the penumbra. Penumbral eclipse happens when Moon passes through the penumbra.

From below which are the types of solar eclipses?

  1. Total solar eclipse

  2. Partial Solar eclipse

  3. Annular solar eclipse

  4. All of above


Correct Option: D
Explanation:

Solar eclipse are of three types:

1,  Partial solar eclipse. 
2. Annular solar eclipse.
3. Total solar eclipse.

Which eclipse is a rare form of eclipse which changes from annular to total solar eclipse along its path?

  1. Partial

  2. Total

  3. Annular

  4. Hybrid


Correct Option: D
Explanation:

Hybrid eclipse are very rare and comes once in 159 years. A shift betwwe the total and annular eclipse takes place in hybrid eclipse.

Fill in the blank:

_________ eclipse occurs on a new moon day.

  1. Solar

  2. Lunar

  3. Either A or B

  4. None of the above


Correct Option: A
Explanation:

Solar eclipse always occurs on a new moon day.

Lunar eclipse always occur on a full moon day.

Fill in the blank:

________ eclipse occurs on a full moon day.

  1. Solar

  2. Lunar

  3. Neither A nor B

  4. Both A and B


Correct Option: B
Explanation:

Lunar eclipse always occur on a full moon day.

Solar eclipse always occur on a new moon day.

When does lunar eclipse happen?

  1. only on full moon

  2. only on new moon

  3. only on quarter moon

  4. none


Correct Option: A
Explanation:

Lunar eclipse occurs on full moon and solar on new moon day.

Lunar eclipses are of 3 types:
1. Total
2. Partial
3. Penumbral

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