Biogeochemical Cycle

Biogeochemical cycle refers to the flow of an elements in nature between the organisms and the environment. This flow is cyclic and consistent. Elements within these cycles flow in various forms from the nonliving (abiotic) components of the biosphere to the living (biotic) components and back. Biogeochemical cycle is also known as inorganic-organic cycle. The … Read More

Structure of the Earth

To study seismic waves, topographic maps, plate tectonics, we should know the structure of the earth. Earth is the only planet known to have an atmosphere containing free oxygen, oceans of water on its surface, and life. This course covers the following: the structure of the earth  seismic waves topographic maps Structure of the Earth … Read More

Rock Cycle

The rock cycle is the continuous process of the changing states of earth minerals. It describes the formation, breakdown, and reformation of a rock. To understand rock cycle, we must learn about types of rocks first. This course covers types of rocks and the rock cycle. Types of Rocks A rock is made of collection … Read More

Continental Drift Theory

Continental drift theory was developed in 1912 by Alfred Wegener, a German meteorologist, climatologist, and geophysicist.  This course covers Continental drift and Plate tectonic theory. Continental Drift According to Alfred Wegener, the continents had all originally been a part of one enormous landmass or supercontinent about 240 million years ago before breaking apart and drifting … Read More