500 facts - earth English Books•English Books•kids•Young Adults
Harry Potter Box Set: The Complete Collection•adventure in khufu's pyramid•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
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.