Most people notice them in well-lit rooms or outdoors on a bright day. Often floaters are normal, but sometimes they're a sign of a more serious eye problem, such as retinal detachment, especially if you also see light flashes or a dark shadow come across the edge of your vision.
A Composite material (also called a composition material or shortened to composite, which is the common name) is a material made from two or more constituent materials with significantly different physical or chemical properties that, when combined, produce a material with characteristics different from the individual components.
A compound is a pure substance that is made up of two or more different elements that are chemically combined. Several common compounds include water (H2O), limestone (CaCO3), salt (NaCl) and carbon dioxide (CO2). It is not easy to separate the elements in a compound because it requires a chemical reaction.his ability to react to oxygen to form rust is called a chemical property. A chemical property is a characteristic that can only be determined by changing the chemical identity of a substance. What we started with was iron, but when it reacts with the oxygen in the air, it turns into iron oxide, or rust.