Geologic Time Vocabulary

Uniformitarianism

• How old a rock is.

• About how old a rock is compared to other nearby rocks.

• The geologic process that occur today are the same ones that occurred in the past.

• Surfaces where rock has eroded away, producing a break, or gap, in the rock record.

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS3-1

Mass Extinctions

• The extinction of a few species on Earth within a short period of time.

• The extinction of many species on Earth within a short period of time.

• the age of rocks and geologic features compared with other nearby rocks and features.

• the numerical age, in years, of a rock or object.

Tags

NGSS.MS-LS4-1

cross-cutting relationships

• the principle that if one geologic feature cuts across another feature, the feature that it cuts across is old

• the preserved remains or evidence of past living organisms.

• a method used by geologists to fill in the missing gaps in an area’s rock record by matching rocks and fossils from separate locations.

• a chart that divides Earth’s history into different time units based on changes in the rocks and fossils

Inclusions

• New rock that cuts through older rock.

• I don't know. But, if you pick this answer you will get it wrong!

• the numerical age, in years, of a rock or object.

• a principle stating that geologic processes that occur today are similar to those that occurred in the past.

What is absolute age?

• the age of rocks and geologic features compared with other nearby rocks and features.

• the numerical age, in years, of a rock or object.

lateral continuity (hint: sometimes the vocabulary word is found in the answer.)

• the principle that in undisturbed rock layers, the oldest rocks are on the bottom.

• a chart that divides Earth’s history into different time units based on changes in the rocks and fossils

• surfaces where rock has eroded away, producing a break, or gap, in the rock record.

• principle that sediments are deposited in large, continuous sheets in all lateral directions.

The law of superposition says then in undisturbed rock layers, the oldest rocks are on the______ layer.

Tags

NGSS.MS-ESS1-4

In the law of superposition, the youngest layer of rocks are found on the ______ layer.

Tags

NGSS.MS-ESS1-4

What is an index fossil?

• a fossil representative of a species that existed on Earth for a short length of time, was abundant, and inhabited many locations. You know the age of the fossil.

• A new fossil never seen before.

• Any fossil that is related to a T-Rex

• I don't know, but if I pick this one I'll get the question wrong.

Tags

NGSS.MS-ESS1-4

I have to fill out The Daily Attendance Form for science

• only on synchronous days

• never

• only on asynchronous days

• every day, including Wednesdays.