Chapter 13 Review 2

Sand grains are classified as:

• immature, young, old, or mature

• immature, young, old, or ancient

• embryonic, young, old, or mature

• immature, middle-aged, old, or mature

Sand from different locations contains different combinations of minerals.  The most common mineral found in sand is:

• an iron compound

• mica

• quartz

• feldspar

Continental sand is composed mostly of quartz, mica, feldspar, and dark-colored minerals like hornblende or magnetite. If a high percentage of quartz is present, it means the sand is:

• very young

• from a polar climate

• very old

• from a temperate climate or high altitude

Volcanic sand is usually dark in color due to the presence of:

• green basalt or black olivine

• black basalt or green olivine

• black basalt or black olivine

• green basalt or green olivine

Volcanic sand is very

• old and contains little or no feldspar, except for obsidian particles.

• old and contains little or no quartz, except for obsidian particles.

• young and contains little or no quartz, except for obsidian particles.

• young and contains little or no feldspar, except for obsidian particles.

When is the best time of day to sight possible gravesites?

• ​after a fresh rain or snow because the heat of the decaying body causes changes in how the moisture collects on the ground

• when the sun is low and shadows are easier to see

• after a wind storm because debris tends to collect in the area immediately surrounding the gravesite

• all of these

​What are the four primary sources of sand?

• continental, compressed ash, feldspar, and mica

• magnetite, skeletal, precipitate, and granite

• continental, volcanic, muddy, and rock

• precipitate, skeletal, volcanic, and continental

Oolitic sand can be found in various places including:​

• near Florida beaches

• near Great Salt Lake

• near Georgia beaches

• near Lake Michigan

Distinct layers of soil are commonly labeled either O, A, E, B, C, or R. A term used to describe this sequence of layers is _____.

Calcium carbonate will sometimes precipitate out of seawater, forming a coat of hard particles that resemble the layers of an onion. These layers eventually form small, round structures called _____

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NGSS.HS-ESS2-5