During creation of the solar system, the materials with higher melting and boiling point within the nebulae were able to coalesce close to the sun because they are less volatile. These materials also happen to be denser. Denser materials have more mass and therefore pulled on more by the gravitational forces of the sun. The more volatile material such as gases was able to coalesce further from the sun –where the gases can cool below boiling and melting points- to form the gas giants such as Jupiter.
Since the industrial revolution, human activities have also resulted in an increase in natural greenhouse gases, especially carbon dioxide. An increase in these gases in the atmosphere enhances the atmosphere's ability to trap heat, which leads to an increase in the average surface temperature of the Earth.
It helps us categorize organisms so we can more easily communicate biological information. Taxonomy uses hierarchical classification as a way to help scientists understand and organize the diversity of life on our planet.
