Analyzing the Rock and Fossil Records

original horizontality

• sedimentary rocks are deposited in horizontal or nearly horizontal layers

• sediments are deposited in large, continuous sheet in all lateral directions

• younger rocks lie above older rocks if the layers have not been disturbed

inclusions

• if one rock contains pieces of another rock, the rock containing the pieces is younger than the pieces

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

• sedimentary rocks are deposited in horizontal or nearly horizontal layers

cross-cutting relationships

• if one rock contains pieces of another rock, the rock containing the pieces is younger than the pieces

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

• sedimentary rocks are deposited in horizontal or nearly horizontal layers

fossils

• rocks that are stuck inside of other rocks

• the remains or traces of ancient living things

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

Tags

NGSS.MS-LS4-1

Uniformitarianism

• the processes that happen today are similar to those in the past

• the actual age of an event or object

• sedimentary rocks are deposited in horizontal layers.

Tags

NGSS.MS-ESS2-2

lateral continuity

• sedimentary rocks are deposited in horizontal or nearly horizontal layers

• sediments are deposited in large, continuous sheet in all lateral directions

• younger rocks lie above older rocks if the layers have not been disturbed

Tags

NGSS.MS-ESS2-3

How do scientists find the relative age of a rock or fossil?

• By measuring what the rock is made of

• By breaking the rock to see inside.

• By comparing rocks in different layers

• By looking where the rock came from

Tags

NGSS.MS-ESS1-4

Which rock layer in this picture is the newest?

• The top layer

• the bottom layer

• they are all the same

• none

Tags

NGSS.MS-ESS1-4

What is rock dating?

• Rock dating is finding out what elements are in the rock

• Rock dating is finding out what kind of rock a rock is

• Rock dating is finding how old a rock is

• going out with a rock

Tags

NGSS.HS-ESS1-5

Newer fossils are made from_____organisms than older fossils

• simpler

• more complex

• i dont know

• less complex

Tags

NGSS.MS-LS4-1