Answer:
1.Shape and composition
Paper clips usually have an oblong shape with straight sides, but may also be triangular or circular, or have more elaborate shapes. The most common material is steel or some other metal, but molded plastic is also used. Some other kinds of paper clip use a two-piece clamping system.
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3.elastic property
Its ability to extend to long lengths and then return to its original shape demonstrates the elastic property of rubber. According to an answer about rubber bands and elasticity on the U.S. Department of Energy website, the polymer molecules in the rubber band are stacked at rest.
4.One of the most noticeable properties of wood is that it is a hygroscopic material, meaning that it tends to absorb moisture from the air depending on the humidity of its surroundings. If the humidity is relatively high, then the wood will absorb more moisture.
5.A metal (from Greek μέταλλον métallon, "mine, quarry, metal") is a material that, when freshly prepared, polished, or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well. Metals are typically malleable (they can be hammered into thin sheets) or ductile (can be drawn into wires).
6.The main characteristics of glass are transparency, heat resistance, pressure and breakage resistance and chemical resistance.
