History of the Earth Part 4:Cenozoic Era

What era is known as the 'Age of Mammals'?

• Mesozoic Era

• Cenozoic Era

• Paleozoic Era

• Proterozoic Eon

Which continent was moving toward Asia during the early Cenozoic?

• Antarctica

• Africa

• Australia

• India

What major geological event began around 34 million years ago?

• Formation of the Himalayas

• Closing of the Isthmus of Panama

• Isolation of Antarctica

• Development of the Gulf Stream

What led to the development of the first permanent Antarctic ice sheet?

• Development of a circumpolar current

• Global warming

• Volcanic activity

• Meteor impacts

What is believed to have caused the development of glaciers in the Northern Hemisphere?

• Continental drift

• Solar flares

• Ocean acidification

• Closing of the Isthmus of Panama

Which event is associated with the cooling of the lower ocean?

• Rise in sea levels

• Decrease in marine life diversity

• Increase in volcanic activity

• Development of robust oceanic circulation

What cycles are responsible for glacial periods?

• Carbon cycles

• Rock cycles

• Milankovitch Cycles

• Water cycles

What is the current period within an ice age called?

• Pleistocene epoch

• Interglacial period

• Glacial period

• Holocene epoch

What major change occurred due to the closing of the Isthmus of Panama?

• Formation of the Rocky Mountains

• Reorganization of ocean circulation

• Expansion of the Arctic ice cap

• Creation of the Sahara Desert

What is the main cause of the subtropical arctic condition predicted?

• Natural Earth cycles

• Burning of fossil fuels

• Decrease in solar radiation

• Asteroid impacts