Test Topics 7th Grade Module 1

-is the principle that in undisturbed rock layers, the oldest rocks are on the bottom

• superposition

• original horizontality

• lateral continuity

• inclusions

According to the principle of ____________, most rock-forming materials are deposited in horizontal layers.

• superposition

• orignal horizontality

• lateral continuity

• inclusions

is the principle that sediments are deposited in large, continuous sheets in all lateral directions

• lateral continuity

• inclusions

• cross-cutting relationships

• superposition

According to the principle of ____________________, if one geologic feature cuts across another feature, the feature that it cuts across is older.

• cross-cutting relationships

• superposition

• lateral continuity

• inclusions

Geologists recognized that fossils that were found in oldest layers of rock are______

• relatively simple organisms

• are more complex organisms

• there are a mixture of simple in complex organisms in oldest layer

Geologists recognized that fossils that were found in younger layers of rock are______

• relatively simple organisms

• are more complex organisms

• there are a mixture of simple in complex organisms in oldest layer

True or False

There are a few times when many types of fossils that appear in one rock layer did not appear in the younger rock layers right above it.

• true

• false

Sudden disappearances in the fossil record of many types of organisms mark

• mass exctinctions

• normal disapperances

• the rock layers are too young

• the rock layers are too old

times when many species on Earth died or became extinct in a relatively short period of time

• Mass extinction

• Global warming periods
• Ice age periods
• Continental drift periods

surfaces where rock eroded away, producing breaks, or gaps in the rock record, called

• unconformities,

• conformities

• sedimentary rock

• horizontal layers