What do you mean of rock?
rock. [ rŏk ] A relatively hard, naturally occurring mineral material. Rock can consist of a single mineral or of several minerals that are either tightly compacted or held together by a cementlike mineral matrix. The three main types of rock are igneous, sedimentary, and metamorphic.
What does a rock consist of?
A rock is an aggregate of one or more minerals, or a body of undifferentiated mineral matter. Common rocks include granite, basalt, limestone, and sandstone.
What is rock and its uses?
Rocks are used for many purposes but some of them that we can see in our daily life are cited below : Making Cement (Limestone) (Sedimentary Origin) Writing (Chalk) (Sedimentary Origin) Building Material (Sandstone) (Sedimentary Origin) Bath Scrub (Pumice) (Igneous Origin)
When was the rock era?
rock and roll, also called rock 'n' roll or rock & roll, style of popular music that originated in the United States in the mid-1950s and that evolved by the mid-1960s into the more encompassing international style known as rock music, though the latter also continued to be known as rock and roll.
How rock are formed?
Through the process of erosion, these fragments are removed from their source and transported by wind, water, ice, or biological activity to a new location. Once the sediment settles somewhere, and enough of it collects, the lowest layers become compacted so tightly that they form solid rock.
What is a rock short answer?
A rock is a solid collection of mineral grains that grow or become cemented together. Some rocks are large while others are small. Small rocks are called pebbles. Every rock is made up of one or more minerals. Geologists (people who study rocks and minerals) classify rocks according to the way they are formed.
What is the importance of rock in nature?
Rocks form the basis for soil and determine the type of natural vegetation and land use. Rocks consist of mineral elements. Basalt, granite, sandstone, slate and quartz are some important types of rocks.
What is a rock for kids?
0:1011:20Rocks for Kids - YouTubeYouTubeStart of suggested clipEnd of suggested clipAll right so what are rocks well rocks are solid chunks of one or more minerals rocks are mineralMoreAll right so what are rocks well rocks are solid chunks of one or more minerals rocks are mineral chunks there are solid chunks of one or more minerals.
What is the most important rock?
Granite is the ultimate silicate rock. As discussed elsewhere in greater detail, on average oxygen and silicon account for 75% of the earth's crust. The remaining 25% is split among several other elements, with aluminum and potassium contributing the most to the formation of the continental granitic rocks.
Who Invented rock?
Rock and roll historians typically regard Chuck Berry as the one artist who came the closest to fitting all the elements of rock and roll together and creating rock and roll as a songwriter's genre.
Who was the king of rock?
singer Elvis Presley"King of Rock and Roll" is a nickname most commonly associated with American singer Elvis Presley (1935–1977). King of Rock and Roll or similar may also refer to: Several other musicians, see honorific nicknames in popular music. "King of Rock and Roll" (song), a song by Dio.
What is rock culture?
Usually, rock is song-based music with a 4. 4. time signature using a verse–chorus form, but the genre has become extremely diverse. Like pop music, lyrics often stress romantic love but also address a wide variety of other themes that are frequently social or political.
What are the types of geologic rocks?
There are two different ways that rocks are often classified; the first is based on the processes by which they form, in which rocks are classified...
What are igneous rocks?
Igneous rocks are formed from solidified magma or lava. Magma is thought to be generated within the layer of partially molten rock underlying Earth...
What are sedimentary rocks?
Sedimentary rocks are formed from deposited and lithified mineral material. Fossils are generally found in sedimentary rock.
What are metamorphic rocks?
Metamorphic rocks are formed when physical and chemical changes occur to igneous, sedimentary, or other metamorphic rocks.
What is a rock cycle?
The rock cycle is a process that explains the basic relationships among igneous, metamorphic, and sedimentary rocks. The process depends on tempera...
Where does rock music come from?
Rock music, also called rock and roll, rock & roll, or rock ’n’ roll, is a form of popular music that emerged in the 1950s and is defined as “a for...
Who led the creation of the hybrid of rock music and folk music, the musical style known as folk roc...
Folk rock is a hybrid musical style of rock music and folk music that emerged in the United States and Britain in the mid-1960s. Folk musicians, le...
Who are some famous early rock music artists?
Some famous early rock music artists include Elvis Presley, The Beatles, Bob Dylan, and Jimi Hendrix.
What is the definition of rock?
Editor of Handbook of Physical Properties of Rocks ( 3 vol. ). rock, in geology, naturally occurring and coherent aggregate of one or more minerals. Such aggregates constitute the basic unit of which the solid Earth is composed and typically form recognizable and mappable volumes. Rocks are commonly divided into three major classes according to ...
What are the textural terms used for rocks?
The common textural terms used for rock types with respect to the size of the grains or crystals , are given in the Table. The particle-size categories are derived from the Udden-Wentworth scale developed for sediment. For igneous and metamorphic rocks, the terms are generally used as modifiers— e.g., medium-grained granite. Aphanitic is a descriptive term for small crystals, and phaneritic for larger ones. Very coarse crystals (those larger than 3 centimetres, or 1.2 inches) are termed pegmatitic.
What is the texture of a rock?
Texture. The texture of a rock is the size, shape, and arrangement of the grains (for sedimentary rocks) or crystals (for igneous and metamorphic rocks). Also of importance are the rock’s extent of homogeneity ( i.e., uniformity of composition throughout) and the degree of isotropy.
How are igneous rocks formed?
Igneous rocks are formed from solidified magma or lava. Magma is thought to be generated within the layer of partially molten rock underlying Earth’s crust at a depth below about 60 kilometres (40 miles). Lava is liquid magma on the Earth’s surface, and the solidified rock formed by cooled lava.
What is the process of forming sedimentary rock?
Erosion includes weathering (the physical and chemical breakdown of minerals) and transportation to a site of deposition. Diagenesis is, as previously explained, the process of forming sedimentary rock by compaction and natural cementation of grains, or crystallization from water or solutions, or recrystallization.
What is the difference between aphanitic and phaneritic rocks?
For igneous and metamorphic rocks, the terms are generally used as modifiers— e.g., medium-grained granite. Aphanitic is a descriptive term for small crystals, and phaneritic for larger ones. Very coarse crystals (those larger than 3 centimetres, or 1.2 inches) are termed pegmatitic.
What is the cooling molten material called?
Igneous rocks are subdivided into two categories: intrusive (emplaced in the crust), and extrusive (extruded onto the surface of the land or ocean bottom), in which case the cooling molten material is called lava.
What is the genre of rock music?
alternative rock. hard rock. classic rock. indie. pop. Rock music is a genre of music started in America. It has its roots in 1940s and 1950s rock and roll and rockabilly, which evolved from blues, country music and other influences.
Where did rock music originate?
Rock usually … read more. Rock music is a genre of music started in America. It has its roots in 1940s and 1950s rock and roll and rockabilly, which evolved from blues, country music and other influences.
What is the origin of rockabilly?
It has its roots in 1940s and 1950s rock and roll and rockabilly, which evolved from blues, country music and other influences. According to the All Music Guide, “In its purest form, Rock & Roll has three chords, a strong, insistent back beat, and a catchy melody.
How many chords does rock and roll have?
According to the All Music Guide, “In its purest form, Rock & Roll has three chords, a strong, insistent back beat, and a catchy melody. Early rock & roll drew from a variety of sources, primarily blues, R&B, and country, but also gospel, traditional pop, jazz, and folk. All of these influences combined in a simple, ...
What is rock music?
the Rolling Stones. The Rolling Stones in the mid-1960s. © David Redfern/Retna. Britannica Quiz. Rock Music and Rock ’n’ Roll.
What is rock's commercial importance?
Rock’s commercial importance was by then reflected in the organization of the multinational recording industry, in the sales racks of international record retailers, and in the playlist policies of music radio and television. If other kinds of music—classical, jazz, easy listening, country, folk, etc.—are marketed as minority interests, ...
Why is rock problematic?
Dictionary definitions of rock are problematic, not least because the term has different resonance in its British and American usages (the latter is broader in compass).
When did rock start?
Originating in the United States in the 1950s, it spread to other English-speaking countries and across Europe in the ’60s, and by the ’90s its impact was obvious globally (if in many different local guises). Rock’s commercial importance was by then reflected in the organization of the multinational recording industry, ...
What are the characteristics of rocks?
Rocks are classified according to characteristics such as mineral and chemical composition, permeability, texture of the constituent particles, and particle size. These physical properties are the result of the processes that formed the rocks. Over the course of time, rocks can be transformed from one type into another, as described by a geological model called the rock cycle. This transformation produces three general classes of rock: igneous, sedimentary and metamorphic .
What is the most important chemical criterion for classifying igneous rock?
Silica content is thus the most important chemical criterion for classifying igneous rock. The content of alkali metal oxides is next in importance. About 65% of the Earth's crust by volume consists of igneous rocks. Of these, 66% are basalt and gabbro, 16% are granite, and 17% granodiorite and diorite.
What are the two types of igneous rocks?
Igneous rocks are divided into two main categories: 1 Plutonic or intrusive rocks result when magma cools and crystallizes slowly within the Earth's crust. A common example of this type is granite. 2 Volcanic or extrusive rocks result from magma reaching the surface either as lava or fragmental ejecta, forming minerals such as pumice or basalt.
How is igneous gabbro formed?
Igneous rock (derived from the Latin word igneus, meaning of fire, from ignis meaning fire) is formed through the cooling and solidification of magma or lava. This magma may be derived from partial melts of pre-existing rocks in either a planet 's mantle or crust.
What causes a rock to melt?
Typically, the melting of rocks is caused by one or more of three processes: an increase in temperature, a decrease in pressure, or a change in composition. Igneous rocks are divided into two main categories: Plutonic or intrusive rocks result when magma cools and crystallizes slowly within the Earth's crust.
What type of rock is formed when magma cools and crystallizes slowly within the Earth's crust?
Plutonic or intrusive rocks result when magma cools and crystallizes slowly within the Earth's crust. A common example of this type is granite. Volcanic or extrusive rocks result from magma reaching the surface either as lava or fragmental ejecta, forming minerals such as pumice or basalt.
How are the types of minerals in a rock determined?
The types and abundance of minerals in a rock are determined by the manner in which it was formed. Most rocks contain silicate minerals, compounds that include silica tetrahedra in their crystal lattice, and account for about one-third of all known mineral species and about 95% of the earth's crust.
What is a rock?
a stone of any size. something resembling or suggesting a rock. curling stone: Regulation weight is verified for each rock before the curling match can begin. a firm foundation or support: The Lord is my rock. Chiefly British. a kind of hard candy, variously flavored. rock candy.
What is rock in science?
rock1. / ( rɒk) /. noun. geology any aggregate of minerals that makes up part of the earth's crust. It may be unconsolidated, such as a sand, clay, or mud, or consolidated, such as granite, limestone, or coalSee also igneous, sedimentary, metamorphic. any hard mass of consolidated mineral matter, such as a boulder.
What does "rocked" mean in court?
to affect deeply; move or sway powerfully, as with emotion; stun: Everyone in the courtroom was rocked by the verdict.
What does "rocks" mean in a sentence?
rocks . Informal. ice cubes for use in a beverage: He usually orders a whiskey without rocks.
What are the three main types of rock?
The three main types of rock are igneous, sedimentary, and metamorphic. A piece of such material; a stone.
What is a stone?
any hard mass of consolidated mineral matter, such as a boulder. mainly US, Canadian and Australian a stone. a person or thing suggesting a rock, esp in being dependable, unchanging, or providing firm foundation.
What does "rock that hat" mean?
to use, wear, or display in a showy, self-confident manner or to great effect: Only you could rock that hat! The game rocks some amazing new features.
Who are the women who rocked us?
The women who've rocked us throughout history: Heart, Joan Jett, Debbie Harry, Pat Benatar, and o...
What is an axe celebration?
A celebration of the songs ruled by an axe.