Scientist who studies, collects, and classifies fossils
Who is a paleontologist?
100
Reveals information about precipitation in an icecap over a period of time
What is an ice core?
100
A gap in the geological record where some rock layers have been lost due to erosion
What is an unconformity?
100
Some scientists think that the Earth is this old
What is 4.6 billion years old?
100
Type of rock that most fossils are found in
What is sedimentary?
200
_____________ fossils are formed when an organism's tissues are replaced by minerals and turned into a stone-like material.
What are petrified?
200
A ________________ fossil contains the entire organism and is encased in amber, tar, rock or ice.
What is whole or preserved?
200
When lava breaks through rock layers and hardens on top an ________________ has occurred.
What is extrusion?
200
The largest periods of time are called _____________.
What are eons?
200
Magma that forces its way into rocks and harden is called an ________________.
What is intrusion?
300
_____________ fossils are useful because they tell the relative age of the rock layers in which they occur.
What are Index?
300
An organism that leaves a 3D shape.
What is cast fossil?
300
Geologists use __________________ to determine the absolute ages of rocks by first determining the amount of radioactive element in a rock.
What is radioactive dating or radiometric dating?
300
Eons are divided into smaller periods of time called _____________.
What are eras?
300
__________________ are the trace or remains of an organism that lived long ago.
What are fossils?
400
A ______________ fossil is a fossilized structure that formed in sedimentary rock by animal activity. Ex. scat, tracks, teeth, etc.
What is trace?
400
Explain the difference between relative date and absolute date.
What is relative date is an approximate age of the rock and absolute date to more exact?
400
Put the following in order from largest periods of time to smaller periods of time: epochs, eras, periods, and eons.
What are eons, eras, periods, and epochs?
400
Geological time begins with a long span of time called The __________________.
What is Precambrian?
400
Explain what the Law of Superposition is and how it helps scientists.
What is younger rocks lie above older rocks in horizontal layers that have not been disturbed? This helps scientists give relative dating to rocks and events that occurred within the Earth's crust.
500
The imprint/impression of an organism's tissue, structure, or shape that leaves a thin fossil
What is carbon film or print?
500
Examine the following ice core. Identify which year had the largest precipitation.
Mrs. Fowler will determine if your answer is correct.
500
Explain how faults, tilting, and folding occurs within the Earth's crust.
What is by earthquakes, continental drifts, and shifts in the tectonic plates?
500
The time that is required for half of an element to decay is called it's ________________.
What is half-life?
500
Examine the following strata puzzle. Tell the order of events from oldest to youngest.
Mrs. Fowler will determine if your answer is correct.