Question

Which characteristics do all terrestrial planets have?

Answer 1

Molten Heavy metal core, one to a few moons, valleys, volcanoes, craters.

Answer 2

Answer:

1. Composed primarily of silicate rocks or metals
2. Central metallic core, mostly iron, with a surrounding silicate mantle
3. Can have canyons, craters, mountains, volcanoes, and other surface structures

Explanation:

We can start saying that a terrestrial planet or telluric planet or rocky planet is kind of planet that is composed primarily of silicate rocks or metals , this the principle characteristic of this planets.    

This planets have a solid surface, making them substantially different from the gaseous planets, for instance Jupiter or Saturn, which are composed predominantly of some combination of hydrogen, helium, and water.

All terrestrial planets in the Solar System, for example, have the same basic type of structure, such as a central metallic core, mostly iron, with a surrounding silicate mantle. The Moon in our planet is similar, but has a much smaller iron core, another example of natural satellites are Io and Europa that have internal structures similar to that of terrestrial planets.  Also, is important says that terrestrial planets can have canyons, craters, mountains, volcanoes, and other surface structures, depending on the presence of water and tectonic activity.

I hope it helps you!