Examine the diagram of a volcano shown above - Leaving Cert Geography - Question 6 - 2008

The 'Secondary cone' is formed by the accumulation of volcanic material ejected from a smaller vent on the side of the main volcano. It is usually situated on the flanks of the main cone and signifies that the volcanic activity is not limited to one primary vent.

The 'Ash cloud' is a cloud of ash and gas that rises into the atmosphere during an explosive volcanic eruption. It consists of fine particles of volcanic ash that can travel significant distances and impact air travel and human health.

The 'Crater' is a bowl-shaped depression at the summit of the volcano formed by the explosive ejection of material during an eruption. It is often the location where the vent is situated and can vary in size.

The 'Magma chamber' is the underground reservoir where magma accumulates before it is expelled during a volcanic eruption. It is located beneath the volcano and acts as a source of volcanic material.