Question

1. use the soil texture triangle above to classify soil with 65% sand, 30% clay, and 5% silt.

a. clay loam b. loamy sand c. sandy clay loam d. sandy clay
use the time - distance graph above to answer question #45.

1. a seismograph measures an earthquake, and the s - p interval is 50 seconds. how far away is the earthquakes epicenter from the location of the seismograph?

a. 520 km b. 480 km c. 400 km d. 640 km

1. which of the following is a true statement regarding shield volcanoes?

a. shield volcanoes are tall, explosive volcanoes consisting of granitic lava.
b. shield volcanoes are huge, broad volcanoes consisting of basaltic lava.
c. shield volcanoes are found on the flanks of cinder cone volcanoes.
d. shield volcanoes are built mostly from pyroclastic debris and are very dangerous.

Explanation:

Step1: Locate soil type on triangle

On the soil - texture triangle, find the point corresponding to 65% sand, 30% clay, and 5% silt. This point falls within the "sandy clay" region.

Step2: Find epicenter distance on graph

On the time - distance graph, find the S - P interval of 50 seconds on the y - axis. Then, draw a horizontal line until it intersects the line on the graph. From the intersection point, draw a vertical line down to the x - axis. The value on the x - axis is approximately 520 km.

Step3: Recall shield volcano facts

Shield volcanoes are large, broad volcanoes made up of basaltic lava. They are not tall and explosive (which are characteristics of composite volcanoes), not found on the flanks of cinder - cone volcanoes, and not built mainly from pyroclastic debris.

Answer:

1. d. sandy clay
2. a. 520 km
3. b. Shield volcanoes are huge, broad volcanoes consisting of basaltic lava.