It is a terrestrial planet, which means it is a rocky planet. It is often called Earth's sister as they are similar structure and weight! But it has a different atmosphere than the Earth's, it has a Carbon Dixode heavy atmosphere (almost 95%). When we look at Venus we actually only see the atmosphere and clouds, it is very difficult to see the surface of Venus. We think there maybe active volcanos on the surface on Venus, as we don't see many impact craters from meteorites which means that the surface is relatively new (around 100 million years, I only use 'new' lightly).
There may have once been oceans and seas on Venus, but due to the temperature rise from the Greenhouse effect it has evaporated! Venus is one of the brightest objects in the night sky, and can be seen in the middle of a clear day but is often seen at Morning or Evenings (it is often mistaken as a UFO, poor Venus).
An artists impression of lightning on Venus.
Have you ever seen Venus in the night sky? Is there anything you'd like to see my talk about?