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Fossils and Geologic time
fossils, vocab words
19
Science
6th Grade
12/05/2011

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Cards

Term

 

carbon capture

Definition
The underground storage of carbon dioxide
Term

 

stratigraphy

Definition
The study of rock layers
Term

 

relative dating

Definition
placing layers of rock, fossils, or geologic events in chronological order so that ages can be compared
Term

 

How old is Earth?

Definition
It is over 4000 years old
Term

 

syncline

Definition
when rock layers fold downwards forming a bowl shape
Term

 

anticline

Definition
when rock layers form an upward mound
Term

 

fault

Definition
a break in earth's crust
Term

 

intrusion

Definition
when molten rock disrupts the layers in rock
Term

 

atom

Definition
part of an element
Term

 

radioactivity

Definition
the natural release of energy
Term

 

isotopes

Definition
when two atoms have the same number of protons but different number of neutrons
Term

 

radioactive decay

Definition
when unstable isotopes break down to stronger and smaller isotopes
Term

 

radiometric age

Definition
using the proof in isotopes that half themselves to date fossils with that mineral in them
Term

 

 fossils

Definition
preserved remains in Earth's crust
Term

 

Types of fossils

Definition
mold and cast, mineral replacment, carbon capture, preserved remains and trace
Term

 

Precambrian Time

Definition
is when earth was forming, when the oceans were just coming to a start and when the only life on earth were micro-organisms
Term

 

Paleozoic Time

Definition
the age of the fish
Term

 

Mesozoic Time

Definition
the time when dinosaurs where the main race and the first mammals where evolving
Term

 

Cenozoic Time

Definition
When humans are the dominant species
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