Materials are substances used to make objects around us. They can be natural, like wood, or man-made, like plastic. Everything we use daily is made from some kind of material.
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Opaque materials do not allow light to pass through them. This occurs because their internal structure scatters or absorbs light, preventing visibility through the material. Examples include wood, metal, and concrete.
Transparency is the property of a material that allows light to pass through it. Materials like glass, clear plastic, and some types of crystal are transparent, allowing us to see through them.
Plastic is lightweight, durable, flexible, and resistant to water and chemicals. It’s also easy to mold into different shapes, making it ideal for a wide range of products, from packaging to electronics.
Plastic is made from petrochemicals through a process called polymerization. This involves combining small molecules, called monomers, into long chains to form polymers, which are then molded into various shapes.