WorksheetsGeologic Time Scale
Total questions: 25
Worksheet time: 13mins
In what time period did Pangaea, the super-continent, appear?
Precambrian
Paleozoic
Mesozoic
Cenozoic
Dinosaurs, small mammals, and birds are found in this time period
Precambrian
Paleozoic
Mesozoic
Cenozoic
The end of life for a group of organisms, usually a species, is called a ___________.
wipeout
mass extinction
meteorite
dying off
Which segment of time is the smallest?
Eon
Era
Period
Epoch
During what Period were Dinosaurs present?
Paleogene
Quaternary
Precambrian
Jurassic
During this period Earth was flowing with lava, the core was unstable, and was the first Era of the Precambrian Eon.
Paleozoic
Hadean
Archean
Cenozoic
Put the following units of geological time in order from largest to smallest unit of time.
Epoch, Eon, Era, Period
Epoch, Period, Era, Eon
Eon, Era, Period, Epoch
Period, Eon, Period, Era
What is the leading cause of mass extinctions of life on Earth?
Mass extinctions are most commonly caused by a dramatic change in some part of the earth system that affects key populations of organisms.
Mass extinctions are most commonly by the shock wave from the collision of a comet or meteoroid with the Earth.
Mass extinctions are most commonly by radiation poisoning from the Sun's solar winds.
Mass extinctions are most commonly by floods that cover all of the land masses on the planet.
The period of geologic time when the biodiversity of life on the planet increased dramatically was
Jurassic
Triassic
Permian
Cambrian
The epoch we are currently living in is the
Holocene
Quaternary
Cambrian
Pleistocene
During which periods did the first land plants, vertebrates, and insects appear?
Jurassic-triassic
Ordovician-silurian
Hadean-acheon
Tertiary-quaternary
The Cenozoic is a
eon
era
period
epoch
The Phanerozoic is a
eon
era
period
epoch
The time when the first jawed fishes and amphibians appeared
Devonian
Jurassic
Cambrian
Hadean
Known as the age of reptiles
Mesozoic
Cenozoic
Phanerozoic
Cambrian
The time when mammals became dominant
Jurassic
Oligocene
Cambrian
Hadean
