The Relative Age Of Rocks Question Preview (ID: 17778)
These Are Practice Questions On The Relative Age Of Rocks.
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The relative age of a rock is
a) its age compared to the ages of other rocks.
b) less than the age of the fossils the rock contains.
c) the number of years since the rock formed.
d) its age based on how much carbon-14 the rock contains.
The law of superposition states that, in horizontal layers of sedimentary rock, each layer is i
a) a younger than the layer above it and older than the layer below it.
b) neither older nor younger than the other layers.
c) older than the layer above it and younger than the layer below it.
d) always older than any vertical layers.
What is the age of an intrusion of igneous rock in relation to the sedimentary rock layers through which it passes?
a) sometimes younger, sometimes older
b) always older
c) the same age as the other rock layers
d) always younger
A rock layer's ___________ age is its age compared to the ages of other rock layers.
a) absolute
b) temporary
c) relative
d) apparent
A(n) ___________ is a gap in the geologic record where some rock layers have been lost because of erosion.
a) opportunity
b) conformity
c) uniformity
d) unconformity
The _________ age of a rock is the number of years since the rock formed.
a) absolute
b) temporary
c) relative
d) apparent
Lava that hardens on a surface is called an
a) absolution
b) extrusion
c) intrusion
d) unconformity
An _________ is when the magma cools and hardens into a mass of igneous rock.
a) absolution
b) extrusion
c) intrusion
d) uncomformity
A(n) _________ fossil is a fossil that must be widely distributed and represent a type of organism that existed only briefly.
a) intrusive
b) unconformity
c) relative
d) index
Index fossils are useful because they tell the ______________ __________ of the rock layers in which they occur.
a) absolute age
b) relative age
c) apparent age
d) temporary age
The study of rock layers is called
a) stratigraphy
b) rock strata
c) fossil record
d) intrusion
A break in the Earth's crust caused by forces inside the Earth is called a(n)
a) intrusion
b) extrusion
c) fault
d) unconformity
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