Frankie is walking to the bus stop in a dense fog. what must be present in order for fog to form?
a. high air pressure
b. high humidity
c. high temperature
d. high winds

If he is walking in a dense fog high humidity will have to rise for fog to form

Polyethylene is a strong synthetic polymer that can be used to make toys and bottles. polyethylene is a plastic material called thermoplastic. one very useful property of thermoplastic is that when it is heated it turns into liquid, which can be molded into desired shape and size. also the material do not dissolve at room temperature.