Which of the following planets is NOT one of the 4 outer planets?
Correct Answer: Mars
Subject: general
Explanation: Mars is a terrestrial (inner) planet along with Mercury, Venus, and Earth. Therefore, it is not an outer planet.
Extra Info: The four outer planets (also known as Jovian planets) are Jupiter, Saturn, Uranus, and Neptune. They lie beyond the asteroid belt, are much larger, and are composed primarily of gases.