Fossils
Dating Rocks
Rock Layers
Rocks
Plate movement
100
The recognizable remain or impressions of an organism that lived in the past.
What are Fossils?
100
The time it takes for one half of the original, unstable atoms to decay into daughter products.
What is Half-Life?
100
Each sedimentary rock unit is older than the rock unit above it and younger than the unit below.
What is Law of Superposition?
100
fractures or breaks in the Earth's crust that often occurs along plate boundaries
What are Faults?
100
Long cylinders of ice.
What are Ice Cores?
200
Time in terms of the history of the Earth.
What is Geological Time?
200
The calculation of the ratio of parent to daughter products.
What is Radiometric Dating?
200
Layers of sedimentary rock.
What is Rock Strata?
200
The study of tectonic plates and how they move.
What are Plate Tectonics?
200
Spew ash and sulfuric gases into the atmosphere
What are Volcanic Eruptions?
300
A calender of the Earth's history.
What is Geological Time Scale?
300
(Special types of atoms) that "fall apart" on predictable time schedules.
What are Radioactive Isotopes ?
300
The theory that all the Earth's land masses were once part of a super continent.
What is Pangea?
300
Lithosphere breaks up into thick, moving slabs of rock.
What are Tectonic Plates?
300
Pangea broke up millions of years ago and the continents shifted.
What is Continental Drift?
400
Refers to all fossils that have been found since the study of fossils began.
What is Fossil Records?
400
Unstable isotopes, decay and form other unstable elements know as daughter products.
What are Radioactive Parents?
400
A model used to describe the changes to the rocks that take place on the Earth.
What is Rock Cycle?
400
Occur where two plates move apart from each other.
What is Divergent Boundaries?
400
Forms where the plates sink.
What is Seduction Zone?
500
The remains of animals that existed for a relatively short period of geologic history.
What are Index Fossils?
500
The age is determined by the relative order in which they appear.
What is Radioactive Measurements?
500
Earth's crust and the underlying soil part of the Earth's mantle.
What is Lithosphere?
500
Occur where two plates push together, causing one of the plates to sink into the mantle.
What is Convergent Boundaries?
500
Magma from deep within the Earth rises to the surface and cools. As it cools, it hardens and become new rock.
What is Sea Floor Spreading?
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