MS ESS 1 4

Longest unit of geologic time (ex. Phanerozoic)

• Period

• Epoch

• Eon

• Era

Tags

NGSS.MS-ESS1-4

One of the three long units of geologic time between the Precambrian and the present

• Period

• Epoch

• Eon

• Era

Tags

NGSS.MS-ESS1-4

One of the units of geologic time into which geologist divide eras

• Period

• Epoch

• Relative age

• Absolute age

Tags

NGSS.MS-ESS1-4

Subdivision of the periods of the geologic time scale

• Period

• Epoch

• Relative age

• Absolute age

Tags

NGSS.MS-ESS1-4

Age of an object compared to the age of another

• Rock strata

• Igneous rock

• Relative age

• Absolute age

Horizontal layers of sedimentary rock

• Rock strata

• Igneous rock

• Sedimentary rock

• Metamorphic rock

Tags

NGSS.MS-ESS1-4

Rocked formed by the crystallization of hot melted rock or minerals

• Rock strata

• Igneous rock

• Sedimentary rock

• Metamorphic rock

Tags

NGSS.MS-ESS2-1

Rock formed from pieces of other rocks that are pressed together

• Fossil

• Igneous rock

• Sedimentary rock

• Metamorphic rock

Rock formed when existing rocks are changed by heat and pressure

• Fossil

• Igneous rock

• Sedimentary rock

• Metamorphic rock

According to the law of superposition, the oldest fossils are found 

• At the top of the rock layers

• Near the bottom of the rock layers

• In the middle of the rock layers

• Somewhat near the surface

Tags

NGSS.MS-ESS1-4