500 facts - earth English Books•English Books•kids•Young Adults
my beautiful world : my friends senses•my beautiful world : the journey of a piece of paper•my beautiful world : the airport and the toy box•my beautiful world : ayman's tale•AMULET : the stonekeeper's curse•AMULET : waverider•AMULET : escape from lucien•AMULET : supernova•AMULET : firelight•AMULET : prince of the elves•AMULET : the last council•AMULET : the cloud searchers
Earth, our home, is the third planet from the sun. It is the only planet known to have an atmosphere containing free oxygen, oceans of liquid water on its surface, and, of course, life. .. About a fifth of Earth's atmosphere is made up of oxygen, produced by plants.