Ceres: The largest object that orbits in between Mars and Jupiter in the asteroid belt, Ceres has an average orbital speed of 17.822 kilometers per second. It was discovered in 1801 by the Italian monk and astronomer Giuseppe Piazzi. In 2006, Ceres was classified as a dwarf planet.
Diffusion is the net passive movement of particles (atoms, ions or. molecules) from a region in which they are in higher concentration to. regions of lower concentration. It continues until the concentration of. substances is uniform throughout. Some major examples of diffusion in biology: â¢ Gas exchange at the alveoli â oxygen from air to blood, carbon. dioxide from blood to air. â¢ Gas exchange for photosynthesis â carbon dioxide from air to. leaf, oxygen from leaf to air.
Molecular diffusion, often simply called diffusion, is the thermal motion of all particles at temperatures above absolute zero. The rate of this movement is a function of temperature, viscosity of the fluid and the size of the particles. Diffusion explains the net flux of molecules from a region of higher concentration to one of lower concentration. Once the concentrations are equal the molecules continue to move, but since there is no concentration gradient the process of molecular diffusion ha