geomorphology & earth landforms section 5 MCQ Questions & Answers Detailed Explanation

Answer: (c)

An equinox is an astronomical event in which the plane of Earth’s equator passes through the centre of the Sun, which occurs twice each year, around 20 March and 23 September.

The equinoxes are the only times when the Sun is exactly overhead at a point on the equatorial line. On an equinox, day and night are of approximately equal duration all over the planet.

Answer: (c)

Answer: (a)

Answer: (d)

Conglomerate is a type of sedimentary rock which is coarse-grained and composed of rounded fragments embedded in a matrix of cementing material such as silica.

Answer: (d)

Answer: (d)

• Basalt is a dark-coloured, fine-grained, igneous rock composed mainly of plagioclase and pyroxene minerals. It most commonly forms as an extrusive rock,
• Granite is a light-coloured Intrusive igneous rock with grains large enough to be visible with the unaided eye. It forms from the slow crystallization of magma below Earth’s surface.
• Sandstone (sometimes known as arenite) is a classic sedimentary rock composed mainly of sand-sized minerals or rock grains.
• Marble is a metamorphic rock that forms when limestone is subjected to the heat and pressure of metamorphism.