Planet Earth Unit 3 Test

Name

the process of determining the approximate age of a rock, fossil, or event

• Absolute Dating
• Relative Dating
• Law of Superposition
• Principle of Lateral Continuity
• Principle of Original Horizontality

a model of Earth’s history divided into eons, eras, periods, and epochs

• Mass Extinction
• Geological Time Scale
• Glacial Period
• Interglacial Period

during an ice age, a time of even cooler temperatures, when large ice sheets advance from the poles toward the equator

• Mass Extinction
• Geological Time Scale
• Glacial Period
• Interglacial Period

during an ice age, a time of warmer temperatures, when large ice sheets begin to melt and retreat toward the poles

• Mass Extinction
• Geological Time Scale
• Glacial Period
• Interglacial Period

the extinction of a large number of species over a relatively short period of time

• Mass Extinction
• Geological Time Scale
• Glacial Period
• Interglacial Period

a fossil of an organism that lived over a widespread area for a short period of geologic time and so can be used to date the rock layers in which it occurs

• Index Fossil
• Relative Dating
• Absolute Dating
• Law of Superposition
• Principle of Lateral Continuity

states that the rock feature that cuts across another rock feature is the younger of the two features

• Law of Cross-Cutting Relationships
• Relative Dating
• Absolute Dating
• Law of Superposition
• Principle of Lateral Continuity

states that the sequence of changes in organisms as recorded by fossils is the same everywhere the fossils are found on Earth

• Law of Fossil Succession
• Relative Dating
• Absolute Dating
• Law of Superposition
• Principle of Lateral Continuity

states that in undisturbed rock layers, the oldest rock is at the bottom and the youngest rock is at the top

• Law of Superposition
• Relative Dating
• Absolute Dating
• Principle of Lateral Continuity
• Principle of Original Horizontality