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type of rock that the grain size is quite small, but you can feel that the rock has a gritty texture of finen sand
sandstone
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pieces of other rocks
clastic
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What happens if you put a drop of dilute hydroohloric acid on sedimentary rocks?
fizzes
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If you go back in time many millions of years ago when this rock was forming, in what sedimentary environment would you be standing?
ocean floor, marine environment
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If you could go back in time many millions of years ago when sandstone was forming, in what sedimentary environment would you be standing?
river delta, flood plane, beach, dessert
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What is the igneous rock family?
granite
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What is the metamorphic rock family?
slate
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What is the key characteristic of the metamorphic rock?
smooth, durable, flat
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What rock is more durable- granite or sandstone?
granite
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A common and effective way to show how a measurement varies accross an area
contour map
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On a contour map the raw data are scattered sampling or recording points and ___ are drawn to connect known or interpreted points of equal value
contour lines
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the difference in elevation represented by two successive contour lines
contour interval
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A measure of the earthquake's effect on people and buildings
Intensity
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Intensity is expressed by Roman numerals ranging for I to XII on the ___; high numbers indicate greater damage.
modified Mercalli scale
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usful in locating the eqicenter of the earthquake
isoseismic map
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the measure of the energy released
magnitude
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The principal tool used to investigate earthquakes
seismograph
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The sharp snap-back sets up vibrations ___ which travel outward in all directions
seismic waves
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the point inside the earth where the rocks ruptured
focus
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The fraction along which movement has taken place is called a
fault
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the place on earth's surface, directly above the focus, where the seismic waves are first felt
epicenter
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Seismic vibrations that travel through the solid earth are of two kinds __ and __ which start at the focus simultaneously
P waves and S waves
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pH measure of how __ or __ liquids are
acidic or basic
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