Final answer:
The main differences between Earth and Venus are their geology, atmosphere, and rotation periods.
Step-by-step explanation:
The main differences between Earth and Venus are:
- Venus does not exhibit the same kind of plate tectonics as Earth, resulting in a very different surface appearance.
- Venus' atmosphere is 96.5% carbon dioxide, which contributes to its extremely high surface temperature.
- Venus has a much longer day than its year, with a rotation period of 243 Earth days compared to its 225 Earth-day year.
Despite their similarities in size and density, Earth and Venus exhibit pronounced differences. Venus has an extremely dense atmosphere with a pressure nearly 100 times that of Earth's, composed predominantly of carbon dioxide (96%).
Unlike Earth, Venus has no oceans and features a sweltering surface temperature of about 730 K (over 850 °F), which is a result of a greenhouse effect. Geologically, Venus lacks the global plate tectonics seen on Earth and presents a surface modified by volcanic activity without plate movements.