Evolution of the Earth

In the Pacific Northwest, two plates are converging causing which of the following features or process? Volcanoes such as the Cascades Mountains such as the Olympics Subduction Earthquakes All of the above Response Grid

What of the following processes did not significantly contribute to the formation of the Columbia Gorge? Erosion from the Columbia River A past tsunami Floods from Glacial Lake Missoula Glaciers from the last ice age Response Grid

Put the following events into order from oldest to most recent. Creation of the Pacific Ocean, the uplifting of the Cascade Range, the ending of the last ice age, last eruption of Mount St. Helens. The uplifting of Cascade Range, the ending of the last ice age, creation of the Pacific Ocean, last eruption of Mount St. Helens. The ending of the last ice age, creation of the Pacific Ocean, the uplifting of the Cascade Range, last eruption of Mount St. Helens. The uplifting of the Cascade Range, Creation of the Pacific Ocean, last eruption of Mount St. Helens, the ending of the last ice age. Response Grid

In the Pacific Northwest, natural disasters (such as earthquakes, tsunamis and volcanic eruptions) are likely to be caused by which geologic process? El Niño event Convergence of two continental plates Divergence of two tectonic plates Subduction of an oceanic plate under a continental plate Response Grid

The subduction of the Juan de Fuca plate under the North American plate created which feature in the Pacific Northwest. The Channeled Scablands The Puget Sound The Palouse Hills The Cascade Mountains Response Grid

Put the following events on the diagram in correct geologic order from oldest to most recent. B A D

C B A D . Layer A was laid down, Layer B was laid down, Layer C was laid down, Fault D occurred Fault D occurred, Layer C was laid down, Layer B was laid down, Layer A was laid down Layer C was laid down, Layer B was laid down, Layer A was laid down, Fault D occurred Fault D occurred, Layer A was laid down, Layer B was laid down, Layer C was laid down Response Grid

To determine the actual age of a layer what method would not be useful for a scientist? Using radioactive isotopes in the layer Measuring the thickness of the layers Finding a fossil of an organism that lived during a certain era Evidence of a documented event (volcanic ash, glacial deposits, flood deposits) in a layer Response Grid

Which of the following do paleoclimantologists not use to gather data of past climates? Tree rings from cut down trees Ice cores pulled from the poles Fossil pollen taken from pond sediment The number of volcanic eruptions in the past Response Grid