Which statement about compaction is false?
A) Grains of sand are crushed into a smaller volume.
B) Spaces between grains are decreased.
C) Flakes of minerals are broken.
D) Compaction may be caused by the weight of overlying sediment.
Answer: A
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Describe the characteristics of the “3.9 – 9.2%g (% of the acceleration of gravity)” Peak Acceleration class.
Earthquakes are one of the biggest natural disaster risks in some parts of the world. In this exercise you will add the USA Earthquake Risk layer to your map and assess the earthquake risk in several areas. Find the USA Earthquake Risk layer by selecting “Add” then “Browse Living Atlas Layers.” Next select “Landscape” then “Ecology” and “USA Earthquake Risk.” Add the layer to your map by clicking “Add layer to map (as layer).” In the Content window on the left side of the screen, click on the ellipses below the layer name and then select “Show item details.” A new screen should appear in your web browser that describes the dataset in the Description and Dataset Summary sections. If more information about the dataset is desired, users can click on “Link to source metadata” toward the bottom of the page. Answer the question about the dataset.
1992 and 1993 were cooler than average years primarily because
A) solar output dipped slightly. B) El Niño occurred. C) La Niña occurred. D) Mount Pinatubo erupted. E) ocean currents shifted significantly.
Oak, hickory, maple, aspen, and birch are most associated with the ____.
A. temperate deciduous forest B. tropical rain forest C. boreal forest D. temperate rain forest E. temperate evergreen forest
Isobaric maps
A) tell us nothing about winds. B) show the Coriolis force. C) indicate the direction and magnitude of the pressure gradient force. D) give the sea-level pressure adjusted for altitude differences across the represented region. E) all of the above