Question

Define the terms:
a) Sand dunes b) Volcano
c) erosion

Answer 1

Answer:

• Sand Dunes - A dune is a mound of sand formed by the wind, usually along the beach or in a desert. Dunes form when the wind blows sand into a sheltered area behind an obstacle. Dunes grow as grains of sand accumulate. Every dune has a windward side and a slip face.

• Volcano - A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often found where tectonic plates are diverging or converging, and most are found underwater.

• Erosion - Erosion is the action of surface processes that removes soil, rock, or dissolved material from one location on the Earth's crust, and then transports it to another location. Erosion is distinct from weathering which involves no movement.

Answer 2

Answer:

a) sand dunes:–

A dune is a mound of sand formed by the wind, usually along the beach or in a desert. Dunes form when wind blows sand into a sheltered area behind an obstacle. Dunes grow as grains of sand accumulate. Every dune has a windward side and a slipface.

Explanation:

b) volcano :– a mountain or hill, typically conical, having a crater or vent through which lava, rock fragments, hot vapour, and gas are or have been erupted from the earth's crust.

c) erosion:– the process of eroding or being eroded by wind, water, or other natural agents.

"the problem of soil erosion"