7. in which sentence is the underlined phrase an adverb prepositional phrase?
o some of the experiments on the space station in the design of new technology.
the united states launched its skylab space station in may 1973.
o the international space station has created a strong partnership between many countries.
o scientists on the international space station conduct hundreds of experiments.

the service industry in the united states grew in the late 1800s. what was one effect of that growth?

the number of people with jobs in factories as unskilled workers decreased.

the number of people with jobs in factories as unskilled workers increased.

the middle class grew as people took jobs as clerks, lawyers, and teachers.

the middle class shrank as people left jobs as clerks, lawyers, and teachers.

2. list two reasons why fossil fuels should no longer be used as a source of energy in america.