Chalk forms from the deep marine accumulation of the plates of organisms called coccolithophores. The plates are composed of the mineral calcite.
The particles of the chalk get rubbed against each other and so a frictional force is produced amongst them and hence chalk produces friction
they are both rocks but both formed different ways chalk is formed by dead sea creatures skeleltons build up to form chalk and limestone is formed by shells and very littke amounts of mud and sand
Chalk is one limestone formed from organic processes. There are others.
Yes "blackboard chalk", it is formed from the microscopic pieces of calcite (coccoliths) from sea micro-organisms. Soem other compounds are sometimes called chalk- e.g. "tailors chalk a very hard chalk used to mark cloth is often made from compressed "talc" a silicate mineral.
chalk is an insulator because heat does not flow through it as easily.
Flint is unique to chalk, and chalk is entirely composed of the remains of tiny sea creatures called coccolithophores and diatoms. Their various shells and skeletons were composed of mainly calcium carbonate, with some species utilising silica. After the chalk was deposited, decompositional bacteria began to feed on organic matter and released sulphur-rich compounds. These compounds mixed with water and formed a weak acid which began to locally dissolve the calcium carbonate proto-chalk. The resulting void filled with a silica rich solution, which over time hardened along with the strata, forming the flint nodules within chalk bedding we see today.
Most chalk was formed in the Cretaceous period, from about 138 million to 65 million years ago.
they are both rocks but both formed different ways chalk is formed by dead sea creatures skeleltons build up to form chalk and limestone is formed by shells and very littke amounts of mud and sand
When you put chalk in vinegar the chalk is dissolved and broken down. However, as a result of the mixture of compounds co2 is formed.
due to capillary action water raises in chalk.. and the air in it comes out in form of bubbles...
Limestone and chalk.
Chalk formed from sediments made of skeletions of microscopic living things in the ocean must be a(n) organic rock.
Chalk is calcium carbonate. Cola is an acid. When these two compounds mixed, hydrogen carbonate is formed. This compound is water soluble, and thus chalk mixed with and acid like cola dissolves in water.
Limestone and chalk.
cretaceous
yes
Limestone and chalk are formed from organic material Limestone - Clastic shell fragments Chalk - Microscopic shells of calicum carbonate plates formed by single celled algaes Chert - Microscopic siliceous organisms, recrystallized silica
Limestone and chalk are formed from organic material Limestone - Clastic shell fragments Chalk - Microscopic shells of calicum carbonate plates formed by single celled algaes Chert - Microscopic siliceous organisms, recrystallized silica