Earth has part(s) Australian continent
Surface
Earth's surface is the top layer of Earth's rigid or liquid structure, at the interface with its atmosphere. Earth as an idealized spheroid has a surface area of about 510 million km2 (197 million sq mi). Earth can be divided into two hemispheres. Generally, Earth is divided by latitude into the polar Northern and Southern hemispheres, or by longitude into the continental Eastern and Western hemispheres. Regarding the surface distribution of land and water, Earth can be divided into an oceans-focused water hemisphere and a landmasses-focused land hemisphere.
Most of Earth's surface is made of water, in liquid form or in smaller amounts as ice. 70.8% or 361.13 million km2 (139.43 million sq mi) of Earth's surface consists of the interconnected ocean, making it Earth's global ocean or world ocean. This makes Earth, along with its vibrant hydrosphere, a water world or ocean world, particularly in Earth's early history when the ocean is thought to have possibly covered Earth completely. The world ocean is commonly divided into the Pacific Ocean, Atlantic Ocean, Indian Ocean, Southern Ocean, and Arctic Ocean, from largest to smallest. The ocean fills the oceanic basins. The ocean floor comprises abyssal plains, continental shelves, seamounts, submarine volcanoes, oceanic trenches, submarine canyons, oceanic plateaus, and a globe-spanning mid-ocean ridge system.
At Earth's polar regions, the ocean surface is covered by a seasonally variable amount of sea ice that often connects with polar land, permafrost and ice sheets, forming polar ice caps.
Earth's land is 29.2%, or 148.94 million km2 (57.51 million sq mi) of Earth's surface area. Earth's land consists of many islands around the globe, but mainly of four continental landmasses, which are, from largest to smallest: Africa-Eurasia, America (landmass), Antarctica, and Australia (landmass). These landmasses are further broken down and grouped into the continents. The terrain varies greatly and consists of mountains, deserts, plains, plateaus, and other landforms. The elevation of the land surface varies from the low point of −418 m (−1,371 ft) at the Dead Sea, to a maximum altitude of 8,848 m (29,029 ft) at the top of Mount Everest. The mean height of land above sea level is about 797 m (2,615 ft).Land can be covered by surface water, snow, ice, artificial structures or vegetation. Most of Earth's land hosts vegetation, but ice sheets (10 %, not including the equally large land under permafrost) or cold as well as hot deserts (33 %) occupy also considerable amounts of it.
The pedosphere is the outermost layer of Earth's continental surface and is composed of soil and subject to soil formation processes. Soil is crucial for land to be arable. Earth's total arable land is 10.7% of the land surface, with 1.3% being permanent cropland. Earth has an estimated 16.7 million km2 (6.4 million sq mi) of cropland and 33.5 million km2 (12.9 million sq mi) of pastureland.The pedosphere and the ocean, with its ocean floor, rest on Earth's crust, which together with parts of the upper mantle form Earth's lithosphere.
Earth's crust is divided into oceanic and continental crusts, while the latter consists of lower density material such as the igneous rocks granite and andesite. Basalt, a denser volcanic rock primarily constitutes the lithosphere of the ocean floors.
contains comprises includes consists of has components