geomorphology & earth landforms section 8 MCQ Questions & Answers Detailed Explanation

Answer: (a)

Answer: (d)

A levee, dike, dyke or flood bank is a broad, low embankment built up along the banks of a river channel during floods.

Levees are usually parallel to the way the river flows, so levees can help direct the flow of the river. Levees can also be artificially created or reinforced.

Answer: (a)

Answer: (d)

Answer: (c)

Arkose is a detrital sedimentary rock, specifically a type of sandstone containing at least 25% feldspar.

It is commonly coarse-grained and usually either pink or grey (depending on the colour of feldspar).

Answer: (c)

The Mohorovicic discontinuity usually referred to as the Moho, is the boundary between the Earth’s crust and the mantle. Named after the pioneering Croatian seismologist Andrija Mohorovicic, the Moho separates both the oceanic crust and continental crust from the underlying mantle.

The Moho mostly lies entirely within the lithosphere; only beneath mid-ocean ridges does it define the lithosphere-asthenosphere boundary.