Mixed Review 3 Question Preview (ID: 24562)
Mixed Review 3.
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Sediment falls to the bottom of the ocean over a long period of time forming layers (stratification). The layers compact and cement into rock that contains seashells. What kind of rock has formed?
a) sedimentary
b) igneous
c) metamorphic
d) sediment
A delta is where a river empties into the sea and dumps its load of silt. A famous delta is found in Mississippi. The process of dumping silt is called
a) weathering
b) erosion
c) deposition
d) evaporation
Which human activities can help prevent soil erosion?
a) planting cover crops and employing contour plowing methods
b) strip mining and deforestation
c) building cities and highways
d) growing crops and burning fossil fuels
Mechanical weathering can cause cracks in rocks in Georgia's northern mountains to widen. How did the cracks most likely form?
a) abrasion as sand blasts the rock when it is windy
b) oxidation as iron-rich minerals rust when they touch oxygen
c) Earthquakes
d) ice wedging as water seeps into cracks, freezes, expands, breaks rock apart, melts, and seeps deeper into the rock.
Why does air chemically weather rock?
a) The air molecules are abrasive.
b) Air fills cracks in the rock and later expands, causing the cracks to enlarge.
c) The oxygen in the air combines with the elements in the rock in a process called oxidation (rust).
d) The rock wears away after wind blows sand against the rock.
Which of the following statements describes how a rock changes after it is in a riverbed for a long time?
a) The rock rapidly breaks into smaller pieces
b) Chunks of the rock break off, and the rock becomes rougher
c) The edges of the rock are worn away, so its surface becomes smoother
d) The rock absorbs water from the riverbed and becomes softer
The component of soil that is made up of organic material is dark and is called
a) abrasion
b) humus
c) bedrock
d) leaching
Which of the following areas would most likely experience the most weathering?
a) an area with high winds, significant rain, hot summers, and freezing winters
b) an area with heavy rains, constant temperatures, and gentle winds
c) an area with constant heat, minimal rain, and high winds
d) all areas are subject to the same amounts of weathering
Water chemically breaks down rocks because
a) water expands when it freezes.
b) acids in the water react with chemicals in the rock.
c) materials dissolved in the water are deposited.
d) water is not affected by wind.
An underground surge in magma causes a sudden and significant increase in the ground temperature of a glacier-covered volcano. This will most likely result in
a) flooding or a mudslide
b) a global temperature increase
c) a tidal wave
d) a forest fire
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