Which one of the following is not a terrestrial planet ?

Question

Accepted Answer

Option 3, Jupiter, is the correct answer because it is not a terrestrial planet. Terrestrial planets, also known as rocky planets, are primarily composed of silicate rocks or metals and have solid surfaces. They are located in the inner part of the solar system. Let's explore why Jupiter is not a terrestrial planet and why the other options are incorrect:

1. **Jupiter**: Jupiter is a gas giant, which means it is primarily composed of hydrogen and helium, lacking a solid surface. It is the largest planet in our solar system and is located beyond the asteroid belt, in the outer solar system. Its composition and location distinguish it from terrestrial planets, making it the correct answer as the one that is not a terrestrial planet.

2. **Venus**: Venus is a terrestrial planet. It has a solid, rocky surface and is similar in size and composition to Earth. It is located in the inner solar system, between Mercury and Earth. Its dense atmosphere and volcanic surface are characteristic of terrestrial planets.

3. **Mars**: Mars is also a terrestrial planet. Known as the "Red Planet," it has a rocky surface with features such as mountains, valleys, and polar ice caps. Mars is located in the inner solar system, just beyond Earth, and shares many characteristics with other terrestrial planets.

4. **Mercury**: Mercury is the smallest terrestrial planet in our solar system. It has a solid, rocky surface and is the closest planet to the Sun. Its composition and proximity to the Sun classify it as a terrestrial planet.

In summary, Jupiter is not a terrestrial planet because it is a gas giant with a composition and location that differ significantly from those of terrestrial planets like Venus, Mars, and Mercury.