True or False Determine if the statement is true or false. If false, replace the word(s) in bold with the correct word(s) on the line. If true, write "true" on the line.

On the surface of Mercury, the sun sometimes appears to move sideways across the sky. =

Mercury is only slightly bigger than the moon. =

A year on Mercury is much shorter than an Earth year. =

Mercury's core is made of steel. =

Mercury has two moons. =

Mercury is closer to the sun than any other planet. =

The surface of Mercury is composed mainly of gas. =