Inner planets

1) The Four Inner Planets of the Solar System Are Solids and Smaller in Size. Why?

  • The inner planets are closer to the Sun.
  • The materials which can survive in the extreme heat produced by Sun combine to form the inner planets, and most of them are metals and rocks.
  • This aggregation of metals and rocks makes the inner planet smaller and rocky.

Four Inner Planets of the Solar System

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2) Why Are There Fewer or No Moons for the Inner Planets?

  • The inner planets are smaller and denser than all the planets in the solar system.
  • Thus they do not have enough gravitational force to attract any celestial body or a Moon. Hence they have significantly less or no moon.

Fewer or No Moons for the Inner Planets

3) Why Is Mars Called the ‘Red Planet’?

  • The soil on mars is very rich in rust due to the presence of iron in the soil.
  • This large amount of rust in the soil gives it its characteristic red colour.
Mars: Red Planet

Science isn't just a subject, it's the way of seeing the world. Curious how Orchids The International School teaches it that way? Talk to our admissions team.

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Admissions Open for 2026-27

Admissions Open for 2026-27

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