noun. This mountain is a landform. This mountain is a landform. The definition of a landform is a natural physical feature on the earth's surface.A mountain or a valley is an example of a landform. any topographic feature on the earth's surface, as a plain, valley, hill, etc., caused by erosion, sedimentation, or movement. noun.oun. This mountain is a landform. This mountain is a landform. The definition of a landform is a natural physical feature on the earth's surface.
Report Abuse. Titanium is a solid at normal conditions (a metal). It is not found in nature as a pure element rather in its oxide form rutile, principally in commercial concentrations in beach sands along the coast of Queensland.
Radon gas is radioactive, and as a gas, it is much more dangerous than a liquid or solid because it is airborne and can be inspired. If you breathe in radon and it undergoes r â¦ adioactive decay inside your lungs, there will be some heavy biological damage.adon is dangerous because it is a highly radioactive gas. Inhaling  it is known to cause lung cancer. You cannot see it, feel it, smell  it or taste it.