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WorksheetsGeologic Time Scale Practice
Total questions: 18
Worksheet time: 12mins
Radioactive Dating is one way that scientists can determine absolute age. The type that scientists use specifically to age fossils (once living organisms) is with the (a) method.
(a) is the type of dating that allows scientists to know the exact age of a fossil or rock.
Match the following
Fossils are the ____, imprints, or traces of once-living organisms preserved in rock.
remains
A ___ may tell a geologist when, where, and how an organism lived.
fossil
A ___ is the cavity left behind in the rock after an organism's hard part has dissolved.
mold
The ___ parts of organisms are most likely to become fossils.
hard
How is the geological time scale divided?
Into eras, periods, and epochs based on significant events in Earth's history.
Solely based on the types of rocks found in each layer of the Earth's crust.
According to the dominant species of flora and fauna present during different times.
Based on the magnetic reversals found in the ocean floor.
Determining the order of events and the relative age of rocks by examining the position of rocks in a sequence is called ____.
absolute dating
radiometric dating
relative dating
radiocarbon dating
Approximately how old is Earth?
12 billion years old
4.6 billion years old
2 million years old
65 million years old
The break up of this super continent at the end of the mesozoic era, created large amounts of diversity on Earth
pangea
panthalsia
gondwana
laurasia
What classifies a mass extinction?
Only 5% of species go extinct.
Massive flooding due to hurricanes.
Happens in a relatively short period of time and is global
There have never been any mass extinctions on Earth.
The hypothesis that evolution of a species occurs in periods of rapid change separated by periods of little or no change is called
divergence
gradualism
punctuated equilibrium
isolation
The hypothesis that evolution of a species occurs gradually over time as a slow and constant process is known as
speciation
punctuated equilibrium
gradualism
microevolution
Which era is known as the "age of reptiles/dinosaurs"?
The Cenozoic Era is known for/as
The age of the dinosaurs.
The earliest era where prokaryotic life dominated the waters.
Life moving from water to land. Reptiles start to be seen.
The current era and is dominated by mammals.
The Precambrian Era is known for/as
The age of the dinosaurs.
The earliest era where prokaryotic life dominated the waters.
Life moving from water to land. Reptiles start to be seen.
The current era and is dominated by mammals.
The Paleozoic Era is known for/as
The age of the dinosaurs.
The earliest era where prokaryotic life dominated the waters.
Life moving from water to land. Reptiles start to be seen.
The current era and is dominated by mammals.
