A metalloid is a chemical element with properties in between, or that are a mixture of, those of metals and nonmetals. There is no standard definition of a metalloid, nor is there complete agreement as to which elements are appropriately classified as such.ecognition status, as metalloids, of some elements in the p-block of the periodic table. Percentages are median appearance frequencies in the list of metalloid lists. The staircase-shaped line is a typical example of the arbitrary metalânonmetal dividing line found on some periodic tables.
The Earth's Biosphere. The biosphere is defined as the sphere or area around the planet Earth where life exists. This zone of life is vast. Most lifeforms live on or near the surface of Earth. However, some live deep within the hydrosphere (oceans, lakes and streams), while others thrive in the depths of the lithosphere (solid portion of Earth). For this reason, mapping the exact borders of the biosphere is quite challenging.
The geosphere is the scientific name for the solid parts of a planet. When you go for a hike, you can think of the ground beneath your feet as part of the Earth's geosphere. In Earth science or geoscience, the geosphere refers to the parts of our planet that are solid (like the mantle and crust). The liquid and gaseous parts are called the hydrosphere and atmosphere. Geosphere, coined in the late 19th century, was modeled after atmosphere, with the Greek prefix geo-, earth..