Geography
Explain the meaning of the following terms:
- Deflation hollow
- River meander
- Block disintegration.
Answer
- Deflation hollow — The wind lowers the ground by blowing away the unconsolidated materials giving rise to large depressions called deflation hollow.
- River meander — S-shaped loops formed in the middle course of the river in plains are called meanders. When the river moves slowly, it bends on a flat surface and swings outward to form larger meanders.
- Block disintegration — It is a type of weathering in which rocks split along the joints into large rectangular shaped blocks. It occurs in well-jointed rock such as granite due to temperature change. It is partially effective in areas with great diurnal range of temperature (10°C to 15°C or more) and barren rocks without a protective vegetation cover.
Related Questions
Draw a neat and well labelled diagram showing the two types of tides.
Define the following terms:
- Epicentre
- Focus
State four factors that affect the movement of ocean currents.
Give a geographical reason for each of the following:
- Volcanic activity and earthquakes occur in the same belt.
- All rivers do not form a delta.
- Chemical weathering is more common in the tropical regions.