Obsidian, Andesite, Gabbro, and Perodite are :

(1) Metamorphic rocks

(2) Intrusive rocks

(3) Sedimentary rocks

(4) Extrusive rocks

Which one of the following is a Sedimentary Rock?

(1) Granite

(2) Charnockite

(3) Basalt

(4) Arkose

Hydraulic Action is a type of erosion caused by

(1) Running water

(2) Wind

(3) Glacier

(4) None of these

Which of the following is the newest geological era?

(1) Permian

(2) Triassic

(3) Cretaceous

(4) Jurassic

Spot the odd item in the following :

(1) Basalt

(2) Ruby

(3) Emerald

(4) Sapphire

Which of the following is an organic rock?

(1) Marble

(2) Coal

(3) Granite

(4) Slate

The mountain formed on the earth crust due to tension is called

(1) Young folded mountain

(2) Old folded mountain

(3) Laccolith mountain

(4) Block mountain

Spot the odd item of the following :

(1) Shale

(2) Marble

(3) Limestone

(4) Sandstone

Solar eclipse occurs when

(1) the Moon does not lie on the line joining the Sun and the Earth

(2) the Moon comes between the Sun and the Earth

(3) the Sun comes between the Moon and the Earth

(4) the Earth comes between the Moon and the Sun

Rift Valley is formed

(1) between two anticlines

(2) between two faults

(3) erosion of synclinal basin

(4) due to a volcanic eruption

Widening of a river valley takes place due to

(1) Corrosion

(2) Lateral erosion

(3) Corrasion

(4) Hydraulic action