500 facts - earth English Books•English Books•kids•Young Adults
english numbers•english letters•the nursery (ai-rwdah)•my lovely family•no bullying - level 1•kalila and demna•building up the personality - level 2•building up the personality - level 3•building up the personality - level 1•english numbers - level 1•The Rescue Princesses 10 : The Ice Diamond•The Rescue Princesses 9 : The Silver Locket
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.