Answer:
Level I ecological regions are: Arctic Cordillera, Tundra, Taiga, Hudson Plains, Northern Forests, Northwestern Forested Mountains, Marine West Coast Forests, Eastern Temperate Forests, Great Plains, North American Deserts, Mediterranean California, Southern Semi-Arid Highlands, Temperate Sierras, Tropical Dry Forests
Explanation:
Around 1800 (plus or minus about 5 years) is when it was estimated that the world's population had reached 1 billion.
Answer:
Earth seismic waves creates vibrations and makes the plate move, it leads to splitting and breaking of the rocks.
Explanation:
- First, when the crust is broken due to forces of folding and faulting processes, the stress extends towards the rocks and which if prolonged can lead to snapping and breaking of the rocks in their new position.
- This process leads to vibration due to the release of the seismic waves. The fault created a fracture in the rocks and thus energy is released from within.
Answer:
Option (C)
Explanation:
The lithosphere is the hard, outermost portion of the earth. They are very brittle in nature as the rocks are deposited in this region. The rocks here breaks due to deformation. The lithosphere is comprised of numerous small and large plates. They are of 2 types, and they are the oceanic crust and the continental crust.
According to the plate tectonic theory, these plates continuously floats over the less dense asthenosphere layer because of the convection current that forms in the mantle. This current generates due to the heat radiated from the core of the earth.
The asthenosphere is the layer just below then lithosphere and here the rocks are solid in nature but they have the ability to flow in response to deformation.
Thus, the lithosphere as a whole moves due to the convection current.
Hence, the correct answer is option (C).
