A barrier island is a long, narrow sand ridge that runs parallel to the coast, formed by wave and tidal action.It protects the mainland from storm surges and erosion.
62.
What causes the formation of terraces in river valleys?
River terraces form when a river cuts into its own floodplain due to tectonic uplift or a fall in sea level (base level), leaving behind step-like landforms.
63.
Which type of weathering involves the chemical alteration of rock minerals?
Chemical weathering breaks down rocks through chemical reactions, like oxidation and hydrolysis.It alters mineral composition, weakening the rock structure.
64.
What is the landform created by wind-blown sand that forms a crescent shape?
Desert pavement is a surface covered with tightly packed pebbles left behind after wind removes finer materials (deflation).It protects underlying soil from further erosion.
67.
What is the process of bouncing sand grains along the ground by wind called?
Saltation is the movement of sand grains in short hops or bounces along the ground, caused by wind.It is the dominant process in sand transport in deserts.
68.
What type of landform is created at the junction of a glacier and a rock wall?
A rockfall is a fast-moving type of slope failure where rocks break free and fall vertically or bounce downslope.Common in mountainous and steep regions.
70.
What is the term for a dry riverbed that temporarily fills with water after rainfall in arid regions?