Question

CASCADE RANGE, PACIFIC COAST OF UNITED STATES AND CANADA: Explosive eruptions are frequent at the numerous volcanoes in the Pacific Northwest region of the United States and in British Columbia (figure 7.4).

A) Occur only in isolated areas
B) Frequent in the mentioned region
C) Rarely occur in the mentioned region
D) Limited to the United States

Answer 1

Volcanic eruptions are frequent in the Pacific Northwest region of the United States and in British Columbia due to the movement of tectonic plates and the presence of hotspots. This region is part of the Ring of Fire.

Step-by-step explanation:

Volcanic eruptions are frequent in the Pacific Northwest region of the United States and in British Columbia. The Cascade Range, located in this region, is known for its numerous volcanoes like Mount St. Helens. These eruptions occur due to the movement of tectonic plates and the presence of hotspots, which allow magma to rise to the surface. The Pacific Northwest region is part of the Ring of Fire, which is a zone of volcanic activity and earthquakes around the Pacific Ocean.