global ice melting

Global Warming - The addition of certain pollutants like the carbon dioxide gases increases the temperature of the earth. These gases remain close to the surface of earth, forming an insulating layer. The surface becomes hot due to the solar radiations. This radiation is normally reflecte..

The addition of certain pollutants like the carbon dioxide gases increases the temperature of the earth. These gases remain close to the surface of earth, forming an insulating layer. The surface becomes hot due to the solar radiations. This radiation is normally reflected back into the space. How..

Most of the solar radiation entering the earth's atmosphere is reflected back into the space. However some of the heat is absorbed by the gases like the carbon dioxide. This serves to keep the earth warm much like the greenhouses. Greenhouses are glasshouses which maintain a temperature higher tha..

>o F in the next century. But, the entire scientific community was not convinced that global warming was occurring. However, the new data coming in is unsettling. The latest evidence that the earth's climate is getting warmer comes not from theoretical models, but from birds, trees, flowe..

The experiment illustrated in figure shows the effect of pressure on the melting point of ice. A thin copper wire passes round a large block of ice and two weights are attached to the free ends of the wire. The pressure of the wire lowers the melting point o..

>As a result of tetrahedral arrangement of H 2 O molecules in the solid state, the ice structure extends in three dimensions. Further the molecules of H 2 O are not packed closely as hydrogen bonds between oxygen and H atoms are longer than covalent bonds between them. This results in vac..

Depending on the conditions for freezing of water, the solid form of water i.e., ice, can exist in different crystalline forms. In 'normal' hexagonal ice, four other oxygen atoms tetrahedrally surround each oxygen atom. One hydrogen atom lies in between each pair of oxygen atom..

Globally sea levels have risen 4-8 inches over the last century. The high temperatures have already started melting polar ice caps sea icebergs and glaciers. This has released enormous amount of water. Warmer temperatures also heat water and make it expand; thus ocean..

There are two overlapping water cycles operating in nature. 1) Global water cycle 2) Biological water cycle. Global water cycle does not involve life. Water evaporates from water bodies like seas and oceans (more than 75% of total evaporation), lakes and rivers. Condensation of ..

Melting point of pure ice at normal atmospheric pressure is regarded as the lower fixed point. ..