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Chapter 4 Quiz: A Trip Through Geologic Time
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A gap in the geologic record formed when sedimentary rocks cover an eroded surface is called a(n)
The process by which all different kinds of living things have changed over long periods of time is called
How do most fossils form?
Freezing preserves the remains of an organism
The hard parts of an organism dry out in the air
The soft parts of an organism change to stone
Living things die and their remains are buried by sediments
The law of superposition states that, in horizontal layers of sedimentary rock, each layer is
older than the layer above it and younger than the layer below it
younger than the layer above it and older than the layer below it
always older than any vertical layers
neither older nor younger than the other layers
A fossil formed when minerals replace all or part of an organism is called a
The relative age of a rock is
less than the age of the fossils the rock contains
its age compared to the ages of other rocks
the number of years since the rock formed
its age based on how much carbon-14 the rock contains
The fossil record shows that life on Earth has changed over time. For example, paleontologists have found that older rocks contain fossils of
organisms that are more complex than those alive today
organisms that are simpler than those alive today
both simple and complex organisms
only organisms that are alive today
What is a fossil?
Any dead organism
An unusual type of rock
A perfect copy of a rock
The preserved remains or traces of an organism
The geologic time scale is a record of
The thickness of sedimentary rock layers
the rate of fossil formation
the life forms and geologic events in Earth's history
the time since the evolution of dinosaurs
Why are index fossils useful to geologists?
They tell the ages of many different rock layers.
They tell the relative age of the rock in which they occur.
They tell the age of the rock at one location only
They tell the absolute age of the rock in which they occur.
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