WorksheetsClues to Earth's Past
Total questions: 15
Worksheet time: 12mins
Carbon films are formed when a thin film of carbon is left, forming an outline of the original organism
True
False
To be a useful index fossil, a species must have been rare.
True
False
A geologist who needed to correlate two rock formations in different areas could match exposed rock layers.
True
False
The principle of original horizontality states that sedimentary rocks are deposited in horizontal layers.
True
False
The remains of living plants or animals are called fossils.
True
False
According to the law of superposition, the youngest rock layers are closest to the surface.
True
False
Fossils most often form when a dead organism is buried in sediments.
True
False
Molds, casts, trace and petrified wood are all examples of
fossils
radioactive
unconformities
disconformities
The principle of superposition can be used to determine.
the actual age of these rock layers
the relative densities
the actual temperatures of these rock layers
the relative age of these rock layers
The oldest rock layers in an undisturbed rock sequence occurs
at the bottom of the sequence
below the sedimentary rock layer
below the unconformity
at the top of the sequence
What is the hardened tree sap that fossil insects are preserved in?
trace fossils
coprolites
amber
An example of a fossil with original preservation includes a
insect embedded in amber
coprolite
dinosaur footprint
mold of a fish skeleton
Index fossils are useful to geologists if the fossils
have lived over a short period of time
are not easily recognized
are not widely distributed geographically
are scarce
An example of trace fossil includes a
cast of a clam
nests
raindrop impression
footprints
Gaps in rock layers are called
unconformities
index fossils
half-lives
none of the above
