|
1) "Chalkboard" -- As to chalkboard chalk chalkboard
Pronunciation: 'chok-"bord
Function: noun
: BLACKBOARD Pronunciation Symbols
A chalkboard, with multiple colors of chalk Blackboard Chalk A quadruple chalkboard at the Helsinki University of Technology A chalkboard or blackboard is a reusable writing surface on which text or drawings are made with chalk or other erasable markers. Blackboards were originally made of smooth, thin sheets of black or dark grey slate stone. A blackboard can simply be a piece of board painted with matte dark paint (usually black or dark green). A more modern variation consists of a coiled sheet of plastic drawn across two parallel rollers, which can be scrolled to create additional writing space while saving what has been written. The highest grade chalkboards are made of a rougher version porcelain enameled steel (black, green, blue or sometimes other colours). Porcelain is very hard wearing and chalkboard made of porcelain usually last 10-20 years in intensive use. Blackboards are commonly used in teaching. The chalk marks can be quickly and easily wiped off with a damp cloth or a special blackboard eraser consisting of a block of wood covered by a felt pad. Chalkmarks made on some types of wet blackboard can be difficult to remove. Blackboard manufacturers often advise that a new or newly resurfaced chalkboard be completely covered using the side of a stick of chalk and then that chalk brushed off as normal to prepare it for use. Sticks of processed "chalk" are made especially for use with blackboards in white and also in various colours. These are not actually made from chalk rock but from gypsum. Blackboards have disadvantages: they produce a fair amount of dust, depending on the quality of chalk used. Some people find this uncomfortable or may be allergic to it, and there has been speculation about links between chalk dust and respiratory problems. The dust also precludes the use of chalk in areas shared with dust-sensitive equipment such as computers. These disadvantages have led to the widespread adoption of the whiteboard, which uses ink markers that produce almost no dust. However, these alternative methods of displaying information have drawback..."
2) "Chalk" -- As to chalkboard chalk 1chalk
Pronunciation: 'chok
Function: noun
Etymology: Middle English, from Old English cealc, from Latin calc-, calx lime; akin to Greek chalix pebble
1 a : a soft white, gray, or buff limestone composed chiefly of the shells of foraminifers b : a prepared form of chalk or a material resembling chalk especially when used (as for writing on blackboards) as a crayon
2 a : a mark made with chalk b British : a point scored in a game
- chalky /'cho-kE/ adjective Pronunciation Symbols
The Needles, part of the extensive Southern England Chalk Formation. Chalk (IPA: /ˈtʃɔːk/) is a soft, white, porous form of limestone composed of the mineral calcite. It is also a sedimentary rock. It is relatively resistant to erosion and slumping compared to the clays with which it is usually associated, so it forms tall steep cliffs where chalk ridges meet the sea. Chalk hills, known as chalk downland, usually form where bands of chalk reach the surface at an angle, so forming a scarp slope. Chalk is formed in shallow waters by the gradual accumulation of the calcite mineral remains of micro-organisms (coccolithophores), over millions of years. Embedded flint nodules are commonly found in chalk beds. Because chalk is porous, chalk downland usually holds a large body of ground water, providing a natural reservoir that releases water slowly through dry seasons. The River Somme is an example of such water release from chalk. Chalk has been quarried from prehistory, providing building material and marl for fields. In southeast England, deneholes are a notable example of ancient chalk pits. The Chalk Formation is a European stratigraphic unit in the upper Cretaceous period. This includes the famous White cliffs of Dover of Kent in England, which are formed entirely of chalk deposits. The Champagne region of France is mostly on chalk formations, with the famous caves being carved out beneath the hills. - Blackboard chalk is a substance used for drawing on rough surfaces, as it readily crumbles leaving particles that stick loosely to these surfaces. Blackboard chalk, often supplied in sticks about 10 cm long, is currently made from the mineral gypsum (calcium sulfate) rather than calcium carbonate.
- In lawn tennis, chalk used to be used to mark the boundary lines of the court (nowadays it is mostly titanium dioxide). This gives the advantage that, if the ball hits the line, a cloud of chalk or pigment dust can be seen.
- In gymnastics, rock-climbing, bouldering and weight-lifting, chalk - usually in the form of magnesium carbonate - is applied..."
Further Data On Term for chalkboard chalk
Internet users who seek chalkboard chalk often also seach for:
,
Regularly Occuring Typos with chalkboard chalk include: hcalkboard cahlkboard chlakboard chaklboard chalbkoard chalkobard chalkbaord chalkborad chalkboadr halkboard calkboard chlkboard chakboard chalboard chalkoard chalkbard chalkbord chalkboad chalkboar xhalkboard dhalkboard fhalkboard vhalkboard khalkboard cyalkboard cgalkboard cjalkboard cbalkboard cnalkboard chqlkboard chslkboard chzlkboard chelkboard chilkboard cholkboard chulkboard chakkboard chaokboard chapkboard chaljboard chaliboard challboard chalmboard chalcboard chalkvoard chalknoard chalkgoard chalkhoard chalkbiard chalkbkard chalkblard chalkbpard chalkbaard chalkbeard chalkbuard chalkboqrd chalkbosrd chalkbozrd chalkboerd chalkboird chalkboord chalkbourd chalkboaed chalkboadd chalkboafd chalkboatd chalkboars chalkboarx chalkboarc chalkboarf chalkboare chalkboart hcalk cahlk chlak chakl halk calk chlk chak chal xhalk dhalk fhalk vhalk khalk cyalk cgalk cjalk cbalk cnalk chqlk chslk chzlk chelk chilk cholk chulk chakk chaok chapk chalj chali chall chalm chalc
Commonly appearing connections are :
chauffeuring, chattanoogan hotel, chastain park concert, charlottesville rentals, charleston place, charles david, charity hospital, chapters indigo ca, changes that heal, chanel handbags, champion underwear, chair stool, chair gliders, chai pendant, chabad, cgi mail form, cf card expansion pack, cessna aircraft company, certified chronometer, ceran cooktop, ceramic cookware, century welders
Similar searches have yielded these phrases chalkboard chalk:
Certain copy here chalkboard chalk made available through Wikipedia and the GNU Free Documentation License.
|