Fossils

Produced when sediments fill in a cavity made when an object decayed 

• cast
• mold
• original remains

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

Cavity in a rock made when an organism decayed

• cast
• mold 
• original remains

Tags

NGSS.MS-LS4-1

Principle that Earth's processes occurring today are similar to those that occurred in the past 

• unconformities 
• uniformitariansim 
• superposition 

Tags

NGSS.MS-LS4-1

Process that uses the properties of atoms in rocks and other objects to determine their ages 

• relative dating
• radioactive decay 
• absolute dating

Tags

NGSS.MS-PS1-1

Principle that states in a sequence of undisturbed rocks, the oldest rocks are on the bottom and the rocks become progressively younger toward the top 

• superposition 
• uniformitarianism
• half-life

Tags

NGSS.MS-ESS1-4

Gaps in rock records made when agents of erosion remove existing rock layers 

• fossils
• unconformities
• permineralized remains

Tags

NGSS.MS-ESS2-2

Method by which a geologist can calculate the absolute age of the rock by knowing the half-life of an isotope 

• radiometric dating
• relative dating
• absolute dating

Tags

NGSS.HS-PS1-8

Time it takes for half of an isotopes atoms to decay 

• relative age 
• absolute age 
• half-life

Tags

NGSS.HS-PS1-8

Fossil of thin layer of carbon atoms and molecules 

• original remains 
• carbon film
• trace fossil

Tags

NGSS.MS-LS4-1

Formed when original material in skeletal remains are replaced by minerals 

• original remains 
• fossil
• permineralized remains 

Tags

NGSS.MS-LS4-1