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Difficulty: EasyThe Earth as a Planet and Earth Movements

Arrange the following inner (terrestrial) planets of the solar system in order of INCREASING distance from the Sun (starting with the planet closest to the Sun).

  1. 1Mercury
  2. 2Venus
  3. 3Earth
  4. 4Mars

Answer

Mercury → Venus → Earth → Mars
In order of increasing distance from the Sun, the terrestrial planets are Mercury (1st), Venus (2nd), Earth (3rd), and Mars (4th).

Step-by-Step Solution

1
Identify the terrestrial (inner) planets in the solar system
The four inner terrestrial planets are Mercury, Venus, Earth, and Mars.
These four planets lie within the asteroid belt and are composed primarily of rock and metal.
2
Recall their average distances from the Sun
Mercury lies at 0.39 AU0.39\text{ AU}, Venus at 0.72 AU0.72\text{ AU}, Earth at 1.00 AU1.00\text{ AU}, and Mars at 1.52 AU1.52\text{ AU}.
Distance from the Sun increases systematically outward along their orbits.
3
Arrange the planets from closest to farthest
The correct sequence is Mercury → Venus → Earth → Mars.
This places the planets in ascending order of their orbital radius from the Sun.

Key Concept

Planetary Sequence and Relative Distance from the Sun
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Topics

The Earth as a Planet and Earth Movements

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