SAN DIEGO CITY COLLEGE Geology 104, Earth Seience, Fall.2018 Semester CRN: 88702
ID: 152989 • Letter: S
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SAN DIEGO CITY COLLEGE Geology 104, Earth Seience, Fall.2018 Semester CRN: 88702 instructor: Anna Evashko office Hours: MW 9:00 a.m. 9:30 a.m. Take Home Quiz #2 Student Name: Email: aevashko@sdccdedu Telephone: 619-885-1249 Instructions: All quizzes are open book/open notes. Each quiz is worth 10% of yo grade. Complete this quiz and turn it in at the beginning of our next class meeting ur Section 1. True/False. Read the statement and indicate whether the statement is true or false by placing a , if true and an "F"if false next to the statement in the space provided (T or F) The volcanic activity found along the edges of the Pacific plate is referred to as the "Pacific Rim of Fire." 1. 2. The Hawaiian Islands were formed by the subduction of the Pacific Plate beneath the North America Plate 3 Ash and lapilli are difterent sized pyroclastic material. The eruptions of the stratovolcanoes in the Cascade Rage are explosive due to their viscous lava. 4. 5. Repeated eruptions of relatively fluid lava from fissures can cause an area to be covered by flood basalts. 6. Shield volcamoes have very steep slpes 7. Pahochoe lava appears smooth and ropy as it cools and forms rock. 8. Basal is the most common magma crupted along oceanic rift systems 9. A volcanic bomb is composed of dynamite. 10. The three types of volcanic cones are shield, composite, and fire. Page 1 ofExplanation / Answer
1. False. Because the volcanic activity found along the edges of the Pacific plate is referred to as the Pacific Ring of Fire. Nor the Rim of Fire. Hence the ans is false.
2. True. The pacific plate subducted under the north american plate and thus Hawaiian island formed.
3. True. Ash and lapilli are two different types.Ash is just like the dust of sand and lapilli is 2 mm to 64 mm in their size.lapilli also vary in color and shape.
6. False. The shield volcanoes have very low slopes. The slope is not too steep. So,it is false.
7. True. Pahoehoe lava appears smooth and ropy as it cools and formed rock.
8.True . Basalt is the most common magma erupted along oceanic rift system.
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