Mars
Mars has evidence of past tectonic activity, such as fault lines and large-scale volcanic features. This suggests that tectonic plate motion may have occurred on Mars in the past.
Mercury does not have any active volcanoes. However, its surface shows evidence of ancient volcanic activity in the form of volcanic plains and lava flows.
Venus shows evidence of recent volcanic and tectonic activity through various geological features, such as large shield volcanoes, extensive lava flows, and rift valleys. Radar imaging from spacecraft like Magellan has revealed relatively young surface features, suggesting that some volcanic activity may have occurred within the last few million years. Additionally, the presence of circular features and fracture systems indicates tectonic processes are still shaping the planet's surface. These observations suggest that Venus is geologically active, challenging the perception of it as a static world.
There is evidence of past volcanic activity but no current activity. Mars is geologically dead. The shield volcano, Olympus Mons (Mount Olympus), at 26 km is the highest known mountain in the Solar System. It is an extinct volcano in the vast upland region Tharsis, which contains several other large volcanoes. It is over three times the height of Mount Everest which in comparison stands at just over 8.8 km.
The volcanic activity history chart shows that the region has experienced multiple periods of volcanic eruptions over time, indicating a history of geological activity and potential volcanic hazards in the area.
Mars
yes
Mars, Earth and Venus, certainly; the tallest volcano in the solar system is on Mars. And Jupiter's moon Io may be the most active body in the solar system when it comes to volcanoes; some of the eruptions go into space!
Venus is known to have active volcanoes, evidenced by lava flows and volcanic structures on its surface. Mars has extinct volcanoes, but there is no current activity. Triton, a moon of Neptune, also shows evidence of past volcanic activity. Earth's moon had active volcanoes in the past, but they are now dormant.
the Moon has experienced volcanic activity in the past. Vesicular basalts contain cavities that suggest the presence of gases when the lava solidified, indicating volcanic eruptions on the Moon. This provides evidence of a dynamic geological history on the Moon.
One piece of evidence supporting Pluto being considered a planet is its spherical shape and orbit around the Sun. However, its classification as a planet has been debated due to its small size, sharing its orbit with other objects, and not being able to clear its orbit of debris like other planets.
No. Volcanic activity tends to lower global temperatures, which would promote glaciers to grow rather than melt. Isotopic analysis of the carbon dioxide being added to the atmosphere shows that most of it is not volcanic. Either way, there is no evidence of a shift in volcanic activity.