Rocks

• Which does not show good cleavage –  Silica
• Metamorphic rocks has the most weather-resisting characteristics –  quartzite
• The type of stone is metamorphic in nature and stratified in structure – Gneiss
• Slate is formed by metamorphic action on – shale
• Sandstone is a/an – Sedimentary rock, Aqueous rock, Silicious rock
• The colour of a mineral in its powdered form is known as – Streak
• Basalt stone is by nature – volcanic
• Stone is unstratified – granite
• The tendency of the minerals to split along a certain plane is called – Cleavage
• Basalt is classified as – Extrusive igneous rock
• Gypsum is a – Rock
• Solid earth and its interior is known as – Lithosphere
• Compact aggregate of minerals found in the earth’s crust is called – Rock
• Rocks have not any – Definite shape and Size

Common Rock Forming minerals

• The rock contains several minerals is known as – Polymineralic rock
• Types of chemical weathering is associated with the felspar, which can be found in granite changing to clay – Hydrolysis
• Type of cleavage observed in – Basal minerals
• If the rock contains only one mineral, it is known as – monomineralic rock
• Moh’s hardness number of Topaz – 8
• Polymineralic rock is – Granite
• Quartz, shale, basalt, granite, marble, gypsum, mica – Quartz and mica are minerals
• Main composition of granite is – Quartz, feldspar and mica
• Mica, mainly, is composed of – potassium and aluminium silicate
• The coarseness of the grains of a mineral is known as – Texture
• The specific gravity of quartz mineral and hardness on the Moh’s scale is – 7 and 7
• Mostly rocks consist of a combination of – 2 or 3 Minerals

Classification of Rocks

• Under heat and pressure granite can transform into – Gneiss
• Classification of rocks is mainly done – Geological, Physical and Chamical Classification
• On the basis of origin classification of the rocks is called – Geological Classification
• Under heat and pressure granite can transform into – Gneiss
• The siliceous sandstone which has been subjected to metamorphic action, is called – Quartzite
• Geologically, marble is known as – Metamorphic rock
• Gypsum is a – Chemically precipitated sedimentary rock
• Syenite is a – Deep seated plutonic rock
• Sandstone is a/an – sedimentary rock, aqueous rock, siliceous rock
• Basalt stone is by nature – volcanic
• Rocks formed by solidification of molten magma are – Igneous rocks
• Granite is a rock that is by nature – Plutonic
• Quartzite and marble are by nature –Metamorphic
• Stone is formed after the metamorphic action of shale – Slate
• Pegmatite is an example of the – intrusive igneous rock
• The sub-classification of sedimentary rocks – mechanical, chemical, organic
• Granite mainly composed of quartz and felsper particles is obtained from – Igneous rocks
• Rocks formed due to alteration of original structure due to heat and excessive pressure are called – Metamorphic rocks
• Sand stone is – Sedimentary rock
• Granite and rhyolite are examples of – Igneous rocks
• Example for metamorphic rock is an – Marble
• Lime stone rock falls in the category – Sedimentary
• Slate and marble stone belong to – Metamorphic rocks
• Solidification of molten magma at the surface of the earth result in the formation of – Basalt and traps
• Identify the type of rocks formed due to the cooling of magma at a considerable depth from earth’s surface – Plutonic rocks
• Slate is a type of – Metamorphic rock
• Sedimentary rock is – Gypsum
• Dolerite is a type of – Igneous rock
• Metamorphic rocks has the most weather resisting characteristics – Quartzite
• Sedimentary rocks are the result of the – accumulation of weathered deposits of igneous rocks
• An example of a sedimentary rock – Sandstone
• Rocks formed by gradual deposition are – Sedimentary rocks
• Represents a metamorphic rock – slate, quartzite
• Gniess is obtained from – sedimentary metamorphic rocks
• Pegmatite is an example of – intrusive igneous rock
• Gniess is obtained from – sedimentary metamorphic rocks
• Pegmatite is an example of – intrusive igneous rock
• The foliated structure is very common in – metamorphic rocks
• hypabyssal rock is – Dolerite
• The rocks which are formed due to pouring of magma at the earth’s surface are called – Volcanic rocks
• The sedimentary rocks are formed due to – gradual deposition of materials like sand, clay etc, generally by setting water
• Igneous rock has – crystalline, glossy, hard or fused texture
• Sedimentary rocks changes into quartzite by metamorphic action – sand stone
• Basalt can be classified as – extrusive igneous
• The rocks formed by cooling down of magma or molten material is called – Igneous rock
• If the molten magma forces itself into an already existing rock in the earth’s crust and soildifies there, such a rock is known as – intrusive rocks
• If the rocks are formed due to alteration of original structure under heat and excessive pressure, then they are known as – metamorphic
• There is process responsible for the formation of igneous rocks – solidification of molten mass silicates below or at the surface of earth
• Metamorphic mineral rock composed entirely of silica – Quartz
• Quartzite and marble are by nature – Metamorphic
• the rocks geologically classified as – 3 units
• Trap is a – Igneous rock
• Volcanic type rock is a – Basalt
• Quartzite, a metamorphic stone is – hard, brittle, crystalline
• The rock in which the silica content is less than 52% – Alkaline rocks
• The rock has more than 60% silica content – Acidic rocks
• The structure of volcanic rocks are generally – Fine-grained crystalline
• The structure of Plutonic rocks are generally – Coarse grained crystalline
• Extrusive rock is known as – Effusive rock