What are two main groups of plastic?
polymers and monomers
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1. Polyethylene. 2. Polyester. These are the main two types of plastics;there may be many more plastics lying on the grounds of this big chunk of land[EARTH].
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 and …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. Thistype of bacteria includes methanogens (the ty…pe of bacteria thatproduce 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 includeheterotrophs, autotrphs, proteobacteria, chemoautotrophs, andenteric bacteria. These are the types of bacteria that are morecommon in less extreme environments.
1. Chondrichthyes- cartilaginous fish- sharks and rays 2. Ostiechthyes- bony fish-
Potential energy and kinetic energy
The two main groups of carbohydrates are starch and sugars.
Oil and Plants
Agronastic plastic and Gangro Plastic