Plato Answer: volcanic activity and tectonic movement
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Explanation:
There are 8 known planets within the solar system that orbits the sun with other planetary matter.
Inner planets are also known as the terrestrial planets. They are rocky balls of mass found very close to the sun.
These planets are: Mercury, Venus, Earth and Mars
The outer planets are the extraterrestrial planets. They are gas giants and are full of gaseous matter. They have huge volume compared to the inner planets.
These planets are: Jupiter, Saturn, Uranus and Neptune
Yemen was the first nation in the Arabian Peninsula to give voting rights to women - it did it in 1967 (South Yemen) and 1970 (North Yemen) - just before Portugal introduced full gender equality in voting! The next country on the Arabian Peninsula was Bahrain in 1973