Ocean trenches are deep sections of the ocean where an oceanic plate is usually sinking below a continental plate. How are they formed? They are formed in the subduction zone as the denser oceanic plate is subjected under the continental plate.
Joseph Priestley is an 18th century natural philosopher who is famous in his experiments in electricity, air, optics and soda water. His works are qualitative rather than quantitative because he does not concern himself with theories but practical applications.
His experiment in electricity through replication of other experiments lead to the publication of his book known as History of Electricity. He observed that electricity conducts through certain materials like coal and that electricity flow from conductors to non-conductors.With this experiments he concluded that conductivity is related to chemical property.
Another experiment that lead to a famous discovery is placing a mice in closed container with mercuric oxide. He concluded that the mice survived sometime because of common air-oxygen. He then relate oxygen in respiration and its use in the blood.
The process, which contribute to the pattern of animal diversity observed is EXTINCTION EFFECTS BOTH LOCALLY AND GLOBALLY.
Biodiversity refers to the varieties of plants and animals, which are obtainable in a particular ecosystem. A high level of biodiversity is always consider to be very important for any ecosystem. The reduction in diversity that was observed was due to mass extinction of some plants and animals. <span />
