GENERAL KNOWLEDGE

GK

SOLAR SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which statement about the four outer planets is true?
A
They all have rings that are easy to see.
B
They are all made of rock.
C
The all have no moons.
D
They are all made of gas.
Explanation: 

Detailed explanation-1: -The four outer planets-Jupiter, Saturn, Uranus, and Neptune-are gas giants made primarily of hydrogen and helium. They have thick gaseous outer layers and liquid interiors.

Detailed explanation-2: -These planets were more massive than the inner planets and were able to attract large amounts of hydrogen and helium, which is why they are composed mainly of hydrogen and helium, the most abundant elements in the solar system, and in the universe.

Detailed explanation-3: -The outer planets are further away, larger and made up mostly of gas. The inner planets (in order of distance from the sun, closest to furthest) are Mercury, Venus, Earth and Mars. After an asteroid belt comes the outer planets, Jupiter, Saturn, Uranus and Neptune.

Detailed explanation-4: -The outer four planets (Jupiter, Saturn, Uranus, and Neptune) are known as gas giants or gas planets. Gas giants are defined as those planets made primarily of gas and do not have a solid surface. The inner four planets (Mercury, Venus, Earth, and Mars) have solid surfaces of rocks and metals.

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