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What are two main groups of plastic?
polymers and monomers
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The two main groups of animals are vertebrates and invertebrates.
Archaea and Bacteria
The two main groups of plants are vascular and non-vascular.
thermoplastic and hypoplastic
Carbon and hydrogen. Many kinds of plastics, such as pure natural rubber (polyisoprene), polyethylene, polystyrene, polypropylene, etc., are composed entirely of carbon a…nd hydrogen. Plastics are essentially long chains of carbon and hydrogen with other elements on occasion -- e.g. chlorine in polyvinyl chloride, nitrogen and oxygen in nylon, fluorine in Teflon, etc.
thermosettings and thermoplastics. A thermoplastic can be remelted and reused, a thermoset cannot.
By properties they are Thermosetting plastics and Thermoplastics
The two main groups of bacteria are archaebacteria and eubacteria. Archaebacteria are typically found in extreme environments. This type of bacteria includes methanogens (…the type of bacteria that produce methane), halophiles (bacteria that lives in salt water), and thermoacidophiles (live in hot, acid waters of sulfur springs). Eubacteria live in a much wider variety of habitats. They include heterotrophs, autotrphs, proteobacteria, chemoautotrophs, and enteric bacteria. These are the types of bacteria that are more common in less extreme environments.
1. Chondrichthyes- cartilaginous fish- sharks and rays 2. Ostiechthyes- bony fish-
Potential energy and kinetic energy
Thermoplastics and Thermosets
The two main groups of carbohydrates are starch and sugars.
Agronastic plastic and Gangro Plastic