Types of Fossils
Fossils - Info
Relative Age
Absolute Age
Random
100
What is the trace or remains of an organism that lived long ago.
What is a fossil?
100
In what type of rock do you find most fossils?
What is sedimentary rock.
100
the age of rocks and geologic features compared with other rocks and features nearby
What is relative age.
100
How is absolute age different from relative age?
Absolute age determines exact age of object
100
Which rocks are formed by heat & pressure?
metamorphic
200
What is a fossilized mark that is formed in soft sediment by the movement of an animal .
What is a trace fossil ?
200
For fossils to form, what 2 conditions must be met?
Buried quickly and have hard parts
200
When magma comes up into sedimentary rock layers, a _____ is formed.
What is an intrusion.
200
Can you always determine absolute age of a rock?
no
200
what type of fossil forms when amber, ice or tar are involved?
What is a preserved remain (full body/true form)?
300
What is a mark or cavity made in a sedimentary surface by a shell or other body .
What is a mold fossil?
300
The name of the scientist that studies fossils.
What is a paleontologist.
300
Which is younger, rock layers or the fault that cuts through it?
What is a fault.
300
Approximately how old is Earth?
4.5 billion yrs old
300
What is igneous rock called when it cools outside earth?
Extrusion
400
What is a type of fossil that forms when sediments fill in the cavity left by a decomposed organism .
what is a cast fossil?
400
What is the yellow, sticky tree sap called when it hardens?
What is amber.
400
a break or gap in the rock record
What is an unconformity.
400
Label layers oldest to youngest.
F, E, D, C, B, A
400
What is the name of the scientist that studies the Earth and rock layers?
What is a geologist?
500
What is a fossil that is found in the rock layers of only one geologic age , and is used to establish the age of the rock layers.
what is an index fossil ?
500
what does the word petrified mean?
To turn into a stone or rock.
500
What two things are used to correlate rocks and fossils?
matching rock layers and index fossils
500
How do you determine the absolute age of a rock?
Measure the radioactive elements in a rock (radiometric dating)
500
How are rock layers and fossils used to learn about Earth's past?
Rock layers and fossils help to determine earth's past environments, organisms and their ages.