chapter 8 multiple choice

which of the following is true of divergent plate boundaries

soils with a very high clay content are not suitable for agriculture without modification because of poor…

e. aeration, water infiltration, and workability

during this type of mining, people are looking for metals like gold in river sediment

placer

the most common element found in the earth’s crust is…

the natural formation of soil is influenced by all of the following EXCEPT

One at a time, you test how quickly each of the following substances will settle out of water. To measure this properly, you separately test each of the following by placing 100 grams of the substance and 500 mililiters of water into a 1 liter jar and screw on the lid tightly. then you shake the jar violently for 1 minute and set the jar down. which one of the following would settle the fastest, creating the clearest water in the fastest amount of time?

productive soil should have a pH near ), which is neutral

7

_ was the supercontinent on earth 225 million years ago. this split into several pieces, which ultimately created the continents we know today.

pangaea

the best textures for an agricultural soil are…

silty and loamy

_ add surface area to roots so the plant can absorb more nutrients and water

root hairs

some forest plants can obtain nutrients from a symbiotic association with

mycorrhizal fungi

soil made up of a mixture of approximately 40% sand, 40% silt, and 20% clay would be called _

at a transform fault, plates slide past each other during an earthquake. between earthquakes…

the plates get stuck and build up enormous amounts of pressure

other than an earthquake, name a geological even that would occur at a subduction zone

I and II

during surface mining, is the material removed in order to access the ore, while the _ are the waste products often led to the mining site

overburden; tailings

this type of rock formed beneath the earths surface when molten rock materials well up, cool, and harden into rock

which one of the following soil horizons is least likely to be interacting directly with living organisms?

c horizon

the process of weathering directly produces what type of rock? 

sedimentary

which of the following would result from soil compaction?

reduced infiltration of water