Geography

Sumacs are shrubs and small trees that can reach a height of 1–10 metres (3.3–33 ft). The leaves are spirally arranged; they are usually pinnately compound,…

The aim of this lecture is to present on Climate of South America. South America has both rainforests and deserts. Half of the rainforest in the world is…

Introductory part of this lecture is to present South America: Continent Series. South America, the planet’s 4th largest continent, includes (12) independent countries and (3) major territories;…

Major objective of this lecture is to present on Social Welfare and Environment. A social welfare system provides assistance to needy individuals and families. The types and…

This lecture introduce on Salt Marshes. Salt Marshes is a community of emerged halophytic vegetation in areas alternately inundated and drained by tidal action.” Here briefly focus on…

Prime purpose of this lecture is to present on Rock Cycle. Rocks change from one form to another, any type of rock can change into another type,…

Metamorphism means to change. Rocks change with temperature and pressure. Usually takes place deep in the Earth. A metamorphic rock is a result of a transformation of…

Sedimentary rocks are formed by erosion. Sediments are moved from one place to another. Sediments are deposited in layers, with the older ones on the bottom. The layers…

Igneous rocks are formed by the cooling and hardening of molten rocks. There are two types of Igneous Rocks. Extrusive/Volcanic Rocks. When magma reaches the surface it…

Principle objective of this lecture is to present on Rocks. A rock is a naturally occurring solid mixture of one or more minerals. Rocks are classified by how…

This lecture introduce on Pangea. Pangaea was a super continent at one time. Scientists use the similarity of rock types and fossil types that date to the same…

The aim of this lecture is to present on Mid-Plate Hotspots. Whilst most tectonic activity is focused on plate margins, it is possible for earthquakes and volcanoes…