The main role of the immune system is to prevent disease caused by infection. Infections can be caused by a wide variety of pathogens, including bacteria, fungi, parasites (such as malaria) and viruses (such as influenza and the common...

The main role of the immune system is to prevent disease caused by infection. Infections can be caused by a wide variety of pathogens, including bacteria, fungi, parasites (such as malaria) and viruses (such as influenza and the common...

Learn the basics about the electrochemical series, as a part of the reactions topic. Different combinations of metals produce different voltages and this depends on how strongly the metal could force its electrons to move across a cell....

Learn the basics about the properties of oxygen. Oxygen is a gas, it has no smell, colour, or taste; but without it, we as humans would not be able to inhabit planet Earth. When cooled to a very low temperature, it will form a liquid and...

Learn the basics about aluminium - anodising it and the uses of aluminium, when learning about metals and their reactivity as a part of environmental chemistry. Aluminium is a very reactive metal. It's protective layer of oxide is very...