1. Allotropes are different forms of an element that each have distinctly different physical or chemical properties.
2. Oxygen, Silicon
3. a) They have the different colors and carbon structure.
b) Their properties are different because although they both possess carbon, they are allotropes.
c) The structure, abundance, color, melting point, and reactiveness account for the difference in cost of each of these items.
4. Engineered materials have been made in a lab and created by scientists for the benefit of our community whereas natural materials are found in nature and have been created naturally on earth.
5. Engineered ceramics in high-temperature applications is sadly extremely brittle and quite often fracture when exposed to dramatic temperature changes. On the other hand, they are durable and have low chemical reactivity.
6. Plastic is a very versatile substance and can be altered to display relatively soft and pliable properties and can also be crafted to be hard and brittle, almost like glass.
No comments:
Post a Comment