the atmosphere is the closest layer to the earth and it is made up of is made up of 78% nitrogen, 21% oxygen, and smaller amounts of argon, carbon dioxide, helium, and neon.
Approximately 180 million years
All continents were united in one super continent known as Pangaea. according to Wegener, an observation into the shape and designs of the continents reveals that all the continents were once one large mass. the continent begun to split approximately 180,000 million years ago.
The Battle of Bardia was fought over three days between 3rd and 5th of January 1941, as part of Operation Compass, the first military operation of the Western Desert Campaign of the Second World War. It was the first battle of the war in which an Australian Army formation took part, the first to be commanded by an Australian general and the first to be planned by an Australian staff. Major General Iven Mackay's 6th Division assaulted the strongly held Italian fortress of Bardia, Libya, assisted by air support and naval gunfire, and under the cover of an artillery barrage
