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WorksheetsSection 17.1-17.2
Total questions: 15
Worksheet time: 15mins
What is the purpose of the geologic time scale?
to classify dinosaurs
to organize Earth's past events
to create work for students
What is the correct order of the four divisions of the geologic time scale? (longest unit of time to shortest)
era - period - eon - epoch
eon - era - period - epoch
epoch - eon - era - period
What period are we currently in?
Cambrian
Jurassic
Carboniferous
Quaternary
What did abrupt changes in the fossil record, from one rock layer to another, indicate to scientists?
that a species existed in one time period and then became extinct
that fossils could move from one rock layer to another
that all rocks and fossils are the same age
Which of the following are events that may cause a mass extinction to occur?
volcanic eruptions
meteorite impacts
changes in land formations
all of the answer choices are correct
The separation of a group of organisms from the rest of its species due to a physical barrier is called:
mass extinction
land bridge
geographic isolation
What type of species existed during Precambrian times?
one-celled organisms
multicellular organisms
Which period does NOT belong in the middle Paleozoic era?
Silurian
Devonian
Ordovician
Which section of the Paleozoic is also referred to as the "Age of Amphibians?"
early
middle
late
Which section of the Paleozoic era had only marine life, large oceans, and a warm climate?
early
middle
late
Plant and animal diversity tends to thrive after an extinction event.
true
false
What is the Carboniferous period known for?
the formation of the coal we use today
vertebrates first existing
the appearance of humans
What is Earth's approximate age?
4.6 million years
4.6 billion years
4.6 trillion years
What is this?
tiktaalik
trilobite
tyrannosaurus
There has only been one mass extinction in Earth's history.
true
false
