SUR 15. Photographs reveal active volcanoes on the moons of Jupiter
and Neptune and extinct volcanoes on Vents and Mars
Exercise 2 Underline each main clause. Add a comma or a semicolon as needed.
Peter has a great interest in volcanoes he hopes to become a volcanologist.
1. Volcanologists study volcanoes.
2. They had always hunted an active eruption and in 1980 they got their chance.
3. Mount Saint Helens is an active volcano in Washington but it had not erupted since
1847
4. In March of 1980, Mount Saint Helens began shaking moreover, its top began to bulge.
5. Scientists raced to Washington from around the world.
6. They knew the mountain would erupt but they could not tell when or how violently.
7. Officials kept people away from the mountain but some adventurous souls went anyway.
8. Mount Saint Helens erupted early on May 18, 1980 and more than sixty people were
killed
9. The destruction to the earth and wildlife was extreme the blast leveled 150 square
miles of forest.
10. The avalanche after the blast killed millions of animals and birds.

author – information on the internet with a listed author is one indication of a credible site. the fact that the author is willing to stand behind the information presented (and in some cases, include his or her contact information) is a good indication that the information is reliable.

date – the date of any research information is important, including information found on the internet. by including a date, the website allows readers to make decisions about whether that information is recent enough for their purposes.

sources – credible websites, like books and scholarly articles, should cite the source of the information presented.

domain – some domains such as .com, .org, and .net can be purchased and used by any individual. however, the domain .edu is reserved for colleges and universities, while .gov denotes a government website. these two are usually credible sources for information (though occasionally a university will assign a .edu address to each of its students for personal use, in which case use caution when citing). be careful with the domain .org, because .org is usually used by non-profit organizations which may have an agenda of persuasion rather than education.

site design – this can be very subjective, but a well-designed site can be an indication of more reliable information. good design make information more easily accessible.

writing style – poor spelling and grammar are an indication that the site may not be credible. in an effort to make the information presented easy to understand, credible sites watch writing style closely.

may we see the excerpt?