WorksheetsRocks & the Fossil Record
Total questions: 43
Worksheet time: 35mins
According to this Principle, if one geologic feature cuts across another feature, the feature that it cuts across is older.
Cross-Cutting Relationships
Superposition
Original Horizontality
Lateral Continuity
Inclusion
According to this Principle, if one geologic feature cuts across another feature, the feature that it cuts across is older.
Cross-Cutting Relationships
Superposition
Original Horizontality
Lateral Continuity
Inclusion
______ is a hard, translucent fossilized resin, typically yellowish in color. This is usually tree sap.
Amber
Fossil
Trace Fossil
A frozen organism does not decay because
it is dried out.
most bacteria can't survive freezing temperatures.
most bacteria survive freezing temperatures.
it needs water to decay.
One method used to estimate the absolute age of a stream is to
count the nmber of streams that join the stream along its full length.
measure the amount of sediment.
measure the rate at which water flows through the stream during a flood.
measure the rate at wich the stream erodes its bed.
The way fossils are formed in very dry places is called
petrification
mummification
sedimentation
imprinting
Whihc of the following are all ways that organisms can be fossilized?
freezing, pretrification, desiccation, amber
desiccation, pretrification, mummification, amber
amber, pretrification, mummification, freezing
mummification, desiccation, pretrification, freezing
The theory that Earth's history can be explained by current geologic processes is:
Catastrophism
Uniformitarism
Superposition
Unconformity
If an igneous intrusion is observed thorugh a layer of sedimentary rock, what geological law applies?
law of superposition
law of crosscutting relationsips
law of thermodynamics
law of uniformitarianism
Index fossils found in rock layers in different areas of the world indicate that the rock layers
are still forming.
formed during the same period of time.
formed during different periods of time.
never fully formed.
In radiometric dating scientists compare the proportion of a radioactive parent isotope to a stable
sister isotope
mother isotope
daughter isotope
child isotope
Organisms that formed index fossils
were destroyed by igneous rocks.
were destroyed by sedimentary rocks.
lived during long spans of geologic time.
lived during short spans of geologic time.
Younger layers of undisturbed sedimentary rock are above older layers of according to
the principle of sedimentarianism.
angular unconformity.
the principle of uniformitarianism.
law of superposition.
Almost all fossils are discoved in
metamorphic rock.
sedimentary rock.
igneous rock.
volcanic rock.
Fossil imprints are
carbonized isotopes of organic material.
carbonized trace fossils.
carbonized bones of animals or fish.
carbonized impressions of plants or fish.
Why is radioactive decay used to determine the absolute age of rocks?
Radioactive decay cannot be used to determine the age of rock.
Radioactive decay does not happen at a constant rate.
Radioactive decay happens very quickly.
Radioactive decay happens at a relatively constant rate.
How is radioactive decay used to determine the absolute age of rocks?
Radioactive substnaces are compared to non-radioactive substnaces.
Daughter isotopes are compared to sister isotopes.
Isotopes of different compounds are compared.
Parent isotopes are compared to daughter isotopes.
Carbon-14 is an isotope
that cannot be used to date objects.
used to date objects less than 70,000 years old.
formed by radioactive decay.
used to date objects over 6,000 years old.
An unconformity is a(n)
layer of sedimentary rocks.
gap in the rock record.
intrusion.
layer of rocks with unusual fossils.
Which of the following enviroments would most likely NOT contain fossils?
sediment deosited in a riverbed
a thick deposit of dried mud
layers of sand that accumulate over thousands of years
intrusive rock formed from cool magma
Which of the following is important if an organism is to become a fossil?
slow burial and soft parts
rapid burial and hard parts
rapid burial and soft parts
slow burial and hard parts
The circled fossil is only found over a short period of time in one geologic layer, so it could be used to date the layer it was found in. What do we call this type of fossil?
bone fossil
bad fossil
crab fossil
index fossil
How many grams of Carbon-14 will remain after 17,100 years- C-14 has a half life 5,730 so 17,100 is about 3 half lives?
32 g
16 g
8 g
4 g
What percentage of Rubidium-87 will remain after 4 half-lives?
25%
12.5%
6.25%
3.125%
What type of fossil is formed when mud fills in the hollow spaces around something hard, such as a shell, and then hardens. This results in a hollow space shaped exactly like the original object?
amber
mold
petrified
cast
Which type of fossil is formed when water deposits minerals to fill in a space. This fossil has the exact same shape as the original organism?
petrified
imprint
cast
mold
This is a fossil in which minerals replace part or all of an organism. making it rock like.
imprint
cast
petrified
amber
The remains or traces of prehistoric life found in sediment and sedimentary rocks.
fossils
unaltered remains
altered remains
carbonization
A fossil that shows the activity of organisms
index fossil
cast and mold
preserved fossil
trace fossil
Which of the following is NOT a way a fossil can be preserved?
tar
amber
water
ice
What type of rock forms fossils?
Intrusive Igneous
Extrusive Igneous
Sedimentary
Metamorphic
Which layer is OLDER? Layer M or Intrusion P?
Layer M
Intrusion P
Which layer is OLDER? Intrusion M or Layer D?
Intrusion M
Layer D
