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The living components of an ecosystem consist of flora, fauna and bacteria, also known as biotic factors. Energy travels through the ecosystem through trophic layers. Trophic layer one consists of primary...

A number of river characteristics change as you travel downstream. Firstly, sediment size decreases due to erosion, which causes sediment to get finer and smoother. This happens due to hydraulic action, a...

Firstly, the aftermath of an earthquake can create an environment where disease spreads due to the close proximity of those gathered after losing homes (creates densely populated communities, especially i...

It can be so hard to identify which of all the masses of facts and figures and definitions you have learnt you need to include for a particular question, especially given the degree to which topics and th...

Throughout the history of the Earth, the climate has always been changing. This is clear from evidence of cycles of glacial advance and retreat. However the last ice age ended abruptly and this can be ass...