You may have to click on the blank to activate it before you start typing in your answer. Relative to the Jovian planets, the size of the terrestrial planets is . The crust is composed of granitic material and has a relatively low density. In addition to the half-life of the material in a rock, must be known to determine a rock's age. The rotation of Venus may be characterized as .
Martian volcanos are the size they are because of an absence of .
Neptune has known satellites. Pluto's satellite is known as . The straight tail of a comet is called the tail.