Book of maps is called an ________.

Humans first landed on Moon in the year _________.

Countless number of _____________ make up the universe.

The needle of the compass always points to the ________

The Earth is surrounded by a layer of air called ____________.

Mercury has no satellites.

____________ is a drawing of the Earth's surface or a part of it on a flat surface.

Aristotle and Nicolaus Copernicus believed that the Earth was flat and had edges.

______________ is the hottest planet.