Stars and the Solar System Test

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Stars and the Solar System Test - 29

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Weekly Quiz Competition

Question 1
1 / -0

In which direction from $$\beta$$ Saptarish (or Ursa Major or Great Bear) shown in the figure, do we search for Pole star?

A
$$\alpha$$ to $$\beta$$

B
$$\gamma$$ to $$\delta$$

C
$$\beta$$ to $$\alpha$$

D
$$\delta$$ to $$\gamma$$

Solution

Let α,β are the pointer stars in Ursa Major
The stars, Merak ( Ursae Majoris) and Dubhe ( Ursae Majoris) are known as the "pointer stars" since they are useful for discovering Polaris, otherwise called the North Star or Pole Star. Let r be a Great Bear since The term Great Bear can allude to Ursa Major, the group of stars, whose name is the Latin for "Incredible Bear" Great Bear Lake, the biggest lake in the Northwest Territories of Canada and the fourth biggest in North America. Also, r Great Bear and proceeding on a line from to that shows genuine north and focuses and towards Polaris (the polestar or North Star, a star of the subsequent extent arranged near the north pole of the sky, in the heavenly body Ursa Minor.) or the North Star. The stars η α and β are the pointer stars in Ursa Major Great Bear r and proceeding on a line from α to β shows genuine north and focuses towards Polaris or the North Star.
Hence the answer is (A).
Question 2
1 / -0

Which of the following statement/s is/are correct about the planet Neptune?

A
It is the outermost planet of solar system.

B
It has moons.

C
It has no life.

D
All of the above.

Solution

Neptune is the eighth planet from the Sun and is the most distant planet from the Sun. The atmosphere of Neptune is made of hydrogen and helium, with some methane. It does not contain oxygen, hence life cannot exist there. Neptune has 14 moons.
Hence, all the options are correct.
Question 3
1 / -0

As per modern classification of solar system, number of planets excluding Earth is:

A
$$7$$

B
$$8$$

C
$$9$$

D
$$10$$

Solution

There are eight planets in the solar system. The four inner terrestrial planets are Mercury, Venus, Earth, and Mars, all of which consist mainly of rock. The four outer planets are Jupiter, Saturn, Neptune, and Uranus, giant planets that consist mainly of either gases or ice.
Thus, as per the modern classification of the solar system, number of planets excluding Earth is 7.
Question 4
1 / -0

Stars, in a constellation form:

A
no shape

B
any arbitrary shape

C
a recognisable shape

D
a straight line always

Solution

A constellation is a group of stars that, when seen from Earth, form a pattern or a recognisable shape.
Question 5
1 / -0

What is the cause for a meteor to burn up on entering the Earth's atmosphere?

A
Atmospheric pressure

B
Heat of the earth

C
Solar radiation of heat

D
Excessive friction

Solution

A meteor is usually a small object that occasionally enters the earth’s atmosphere. At that time it has a very high speed. The friction due to the atmosphere heats it up. It glows and evaporates quickly. That is why the bright steak lasts for a very short time.
Question 6
1 / -0

It takes Earth one year to orbit the sun.

A
True

B
False

C
Ambiguous

D
Data Insufficient

Solution

The movement of the earth around the sun in a fixed path or orbit is called Revolution. It takes Earth one year ($$365$$ days) to orbit the sun.
Question 7
1 / -0

Which factor is most directly responsible for determining how often a full moon appears?

A
The size of the moon

B
The size of earth

C
How quickly the moon orbits the earth

D
How quickly the moon turns on its axis

Solution

A full moon occurs when the moon moves in its orbit such that the earth is in between the moon and the sun. Therefore how often a full moon appears depends on how quickly the moon orbits the earth.
Question 8
1 / -0

Mercury is closer to the Sun than the Venus. But Venus is hotter than Mercury. This is because

A
Mercury has no atmosphere and Venus has a thick atmosphere which can retain the heat.

B
Mercury is mostly made up of sedimentary rocks while Venus contains igneous rocks.

C
Mercury being closer to the Sun, Sun absorbs the heat of the Mercury.

D
All of the above are true.

Solution

Venus is hotter due to the greenhouse effect: Venus has an atmosphere about ninety times thicker than that of Earth, and made almost entirely of carbon dioxide, which is one of the gasses that causes the greenhouse effect on Earth. On the other hand, Mercury's atmosphere contains small amounts of hydrogen, helium, and oxygen. So, the heat received can be emitted as well. This is the reason why Venus is hotter than Mercury.
Question 9
1 / -0

Pole star always appears stationary to a person standing on Earth because

A
Pole star always lies above the person in perpendicular position.

B
Axis of Earth's rotation always passes through Pole star.

C
Pole star remains fixed.

D
Relative velocity of earth and pole star is zero.

Solution

The sky above Earth appears to rotate because of the rotation of the Earth. The apparent fixed stars go East to West as the Earth rotates West to East. But since the axis of rotation of Earth passes through pole star, it is that point about which the sky rotates and hence the pole star appears fixed.
Question 10
1 / -0

Which of these appears in the earth's atmosphere?

A
A moon

B
A meteor

C
An asteroid

D
A comet

Solution

A meteoroid is a small rocky or metallic body in outer space. Meteoroids are significantly smaller than asteroids and range in size from small grains to one-meter-wide objects. Objects smaller than this are classified as micrometeoroids or space dust.

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Re-Attempt Weekly Quiz Competition

Stars and the Solar System Test - 29

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Stars and the Solar System Test - 29

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SHARING IS CARING

Question 1

$$\alpha$$ to $$\beta$$

$$\gamma$$ to $$\delta$$

$$\beta$$ to $$\alpha$$

$$\delta$$ to $$\gamma$$

Solution

Question 2

It is the outermost planet of solar system.

It has moons.

It has no life.

All of the above.

Solution

Question 3

$$7$$

$$8$$

$$9$$

$$10$$

Solution

Question 4

no shape

any arbitrary shape

a recognisable shape

a straight line always

Solution

Question 5

Atmospheric pressure

Heat of the earth

Solar radiation of heat

Excessive friction

Solution

Question 6

True

False

Ambiguous

Data Insufficient

Solution

Question 7

The size of the moon

The size of earth

How quickly the moon orbits the earth

How quickly the moon turns on its axis

Solution

Question 8

Mercury has no atmosphere and Venus has a thick atmosphere which can retain the heat.

Mercury is mostly made up of sedimentary rocks while Venus contains igneous rocks.

Mercury being closer to the Sun, Sun absorbs the heat of the Mercury.

All of the above are true.

Solution

Question 9

Pole star always lies above the person in perpendicular position.

Axis of Earth's rotation always passes through Pole star.

Pole star remains fixed.

Relative velocity of earth and pole star is zero.

Solution

Question 10

A moon

A meteor

An asteroid

A comet

Solution

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