Compare and contrast a natural and synthetic resource.

The difference between natural and synthetic material is that natural materials are those that can be found in nature while synthetic materials are those that are chemically produced in a lab. Note that a natural material that is altered physically is still considered a natural material.

Many different materials are used for clothing and other products. Common natural materials include cotton, paper and wool. Common synthetic materials include plastics, which are typically polymers. Synthetic materials are often designed to be stronger and more resistant to damage than any commonly available natural material. There is a limited amount of natural materials available, but a near limitless amount of potential materials that can by synthetically created.

The tropical storm flooded half of the city and left thousands of people homeless, which the meteorologists had predicted.

Explanation:

An independent clause has a subject and a predicate. It is capable of expressing a complete thought on its own. On the other hand, a subordinate clause is formed by a subject and a verb and starts with a subordinate conjunction or a relative pronoun - in this case, "which". A subordinate clause does not express a full idea on its own, it needs the information expressed by the main clause in order to make sense.

The subordinate clause "which the meteorologists had predicted" lacks information to make sense since it is not attached to an independent clause. By adding "The tropical storm flooded half of the city and left thousands of people homeless" and connecting the subordinate clause to it, we have a complete piece of information. In this case, since the subordinate clause has the function of explaining something said in the independent one, we should separate them with a comma. The result is:

"The tropical storm flooded half of the city and left thousands of people homeless, which the meteorologists had predicted."