A chemical called polypropylene makes up many of the most common plastic products people use, including bottles, containers, furniture, automobile parts, and toys. Eating utensils made out of polypropylene are shown below.

Question

The method used to make polypropylene involves extracting crude oil from the Earth and heating it in a process known as cracking. The cracking process results in many different types of organic chemicals. Some of these chemicals are combined in certain ratios with synthetic catalysts added. The resulting chemical, polypropylene, can then be molded into many different useful shapes to create a wide array of products.

What is a natural resource used to make polypropylene?
A.
plastic
B.
automobile parts
C.
the cracking process
D.
crude oil

Answer 1

D. crude oil