WorksheetsCh22 Geologic Time - The Phanerozoic
Total questions: 10
Worksheet time: 5mins
What does Phanerozoic mean?
Visible Life
Microscopic Life
Micro Life
Middle Life
What does the Cambrian represent?
An explosion of life.
A decrease in available life.
The emergence of life.
The emergence of multicellular life.
What did the freezing of the entire planet enable for Earth?
It killed off ALL life and forced a restart of the development of life on Earth.
It allowed for the warming of the planet.
It allowed hydrogen peroxide to form during the melting process which in turn greatly oxygenated the planet and the oceans.
It protected the planet from meteor strikes for several thousand years.
What caused the extinction event that ended the Cambrian?
A volcanic eruption put too much CO2 in the atmosphere.
A great amount of oxygen was pulled from the oceans by available life and as a result a great die-off occurred.
Tectonic activity filled the oceans with sediment.
Species couldn't compete for proper resources to survive.
When is it estimated that life transitioned from the oceans onto land?
During the Hadean.
During the Cambrian.
During the Silurian.
During the Proterozoic
What are the three eras of the Phanerozoic?
Hadean, Archean, Proterozoic
Paleozoic, Mesozoic, Cenozoic
Triassic, Jurassic, Cretaceous
Cambrian, Triassic, Paleogene
What does Paleozoic mean?
Modern life
Middle life
Multicelled life
Ancient early life
What does Mesozoic mean?
Middle ancient life.
Early life.
Emergent life
Extinct life.
What was the Devonian named for?
The age of man.
The age of dinosaurs.
The age of fishes.
The age of gondwana.
What caused the Ordovician - Silurian extinction event?
A loss of CO2 in the atmosphere which caused global cooling.
An increase of CO2 and a runaway greenhouse effect.
An increase of oxygen and an explosion of life.
A decrease of oxygen and anoxic conditions in the oceans.
