Since limestone is predominantly composed of calcium carbonate (CaCO3), it is soluble in acid (or when crushed soluble in water) and is an alkali. Also it makes good lime for the garden, when heated properly it makes good portland for concrete, and is used in toothpaste and antacids.
For information on the material properties of limestone, such as strength, stiffness and density, please see the related questions.
The chemical formula of chalk is CaCO3 which is a form of calcium chloride. It is actually a form of limestone, which is a soft mineral.
A piece of chalk has a hardness of one. A human fingernail has a hardness of and a penny has a hardness of 3.5.
Limestone is a type of rock that is commonly composed of coral or other marine life. It consists of mainly silica and clay.
Limestone, calcium carbonate (CaCO3) more specifically.
Chalk can be any color.
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Appearance is a physical property.
Acne is one of the disorders that affect your physical appearance.
False. An organisms physical appearance is its phenotype.
The outward appearance of a person i.e his height , color , size. features etc , or phenotype is called physical appearance
Chalk is a hard rock, with large lines of weakness so will erode by physical weathering and the sea.
Crushing a piece of chalk is only a physical change. Chemically, it is still chalk.
It doesn't matter if something is reversible or irreversible. it will not depend if it is a chemical or physical change. A physical change is when the composition of a substance remains unaltered (the particles stay the same) and no new substance is produced. Such as when you make a paper plane out of paper, the appearance changed, the particles stayed the same, no new substance was created, and the paper remains paper. A chemical change is when the composition of a substance is altered and a new substance is produced. Such as when paper is burned, the new substance produced is the carbon and other gases from the fire, and the composition of the paper changes, slowly disappearing.It usually is unless you draw so rapidly that the heat of the friction heats the paper and causes it to smoke.
I would say it is a physical change the chalk is being reduced to a smaller size. It still remains chalk.
Grinding chalk really doesn't change the chalk except to make it into powder. So that makes it a physical change. It is much like ice melting into water.
It is a physical change.
Appearance is a physical property.
physical
physical :)
Soft & brittle.
a physical appearance is helpful in a perception
Grinding chalk to chalk dust is a physical change because the texture and size may change but the its molecules are still the same.An example of chemical change is burning paper because ash is chemically different from paper.
traits are the physical appearance of a living thing.