Earth's Structure and Surface

Earth is the ______ planet from the Sun.

Earth's diameter is about ______ kilometers at the equator.

Earth's surface has large depressions filled with water called ______ and seas.

Earth's atmosphere is the right thickness to keep it warm for living things like ______.

The air we breathe is mostly ______, with plenty of oxygen.

A year on Earth is ______ days long.

Earth has just one ______.

Earth spins around an imaginary line passing through its ______ and South Poles.

Earth also moves around the ______, which is called its revolution.

Venus and ______ are Earth's neighboring planets.