Norton makes it easy to use Google Earth — just visit Google and download the program. Scroll down for more information.

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sSee for Yourself sections at the end of each chapter point to suggested sites. Students can

find the sites with by using coordinates or the Google earth kmz file on StudySpace.

If you want to assign Google Earth activities, pre-built GeoTours come with worksheets available electronically (in Coursepacks and in SmartWork) or on paper (in the GeoTours Workbook — a free package item).

☐ stratovolcano☐ cinder cone

Composite Cone Volcanoes2. Composite cones (or stratovolcanoes) have the characteristic symmetrical shape most commonly associated with volcanoes. They are typically comprised of layers of andesitic lava and pyroclastic materials. Because of their composition, these volcanoes tend to be very explosive.(a) Check and double-click the placemarks for Problem 2a to fly to Mt. Saint Helens in the

Cascade Range of western Washington. Turn on the “Mt. Saint Helens contour map” in the Problem 2 folder. The brown lines are contours (lines of equal elevations). Use the Ruler

Tool to determine the horizontal distance between placemarks for Problem 2a (use feet as your units) and then subtract the elevations (ft) for each placemark from the contour map to determine the relief. Find the slope of Mt. Saint Helens using the following formula (this value is representative for many composite cone volcanoes):slope angle = tan-1 (relief ÷ horizontal distance). ☐ 5-10°☐ 15-20°☐ 25-35°☐ 35-45°

(b) Check and double-click the placemarks for Problem 2b and turn on the “Mt. St. Helens

Volcanic Features” map. Use the Ruler Tool to determine the greatest distance (in km) affected by the lateral blast of the May 18, 1980 eruption (measure between the placemarks for Problem 2b). ☐ 98-101 km☐ 16-21 km☐ 40-44 km☐ 22-28 km

(c) Check and double-click placemark Problem 2c to fly to the town of Bronte near Mt. Etna, a large mountain on the island of Sicily. You are a geologic consultant for a company that is considering building a factory in Bronte. Based on your previous work on Mt. Saint Helens and on observations that you make as you fly over the region, decide which answer you would give the company. ☐ no, Bronte is about 15 km from an active composite cone volcano☐ no, a previous lava flow has covered the eastern parts of town☐ no, because of both of the previous reasons☐ yes, the weather here is great

(d) Check and double-click the placemarks for Problem 2d to fly to Mt. Vesuvius in Italy and view

the “Pompeii Pyroclastic Flow Flyover.” Use the Ruler Tool to determine the distance (in km) from Mt. Vesuvius to the excavated ruins of the city of Pompeii (which was buried by volcanic ash and pyroclastic material from Mt. Vesuvius during the eruption of 79 C.E.) If a nuée ardent (pyroclastic surge) accompanies the next eruption of Mt. Vesuvius and it travels at 300 km/hr, how many minutes would it take to reach the site of ancient Pompeii? ☐ ~2 min☐ ~0.2 min☐ ~5 min☐ ~7 min

Name:__________________________________

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Geotour Worksheet EVolcanoes

E. Volcanoes

Worksheet

To answer questions for this worksheet, go to the following Geotours folder in Google Earth:2. Exploring Geology Using Google Earth > Geotour Worksheets > E. Volcanoes

Supplemental background material also may be available in your textbook, through various internet resources, and within files in the 2. Exploring Geology Using Google Earth > Geotour Site Library.

To answer questions for this worksheet, go to the following Geotours folder in Google Earth:2. Exploring Geology Using Google Earth > Geotour Worksheets > E. Volcanoes

Supplemental background material also may be available in your textbook, through various internet resources, and within files in the 2. Exploring Geology Using Google Earth > Geotour Site Library.

E. Volcanoes

Worksheet

Shield Volcanoes• Mauna Loa, HI• Kilauea, HI• Mauna Kea, HI

Composite Cone Volcanoes• Mt. St. Helens, WA• Mt. Etna, Italy• Mt. Vesuvius, Italy• Crater Lake, OR

Cinder Cone Volcanoes• SP Mountain, AZ• Menan Buttes, ID• Sunset Crater, AZ

Name:__________________________________

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