Earthquakes
Tectonic Plates
Volcanoes
Geologic Timescale
Earth's history
100
The location on the surface directly above the focus.
What is epicenter
100
The scientist who first proposed the continental drift theory.
Who is (Alfred) Wegener?
100
the measure of a material's resistance to flow.
What is viscosity?
100
The Earth is ________ years old.
What is 4.56 billion years old?
100
Longest subdivision of the Earth's history, preceding the Cambrian period
What is Precambrian history
200
The hypothesis about the cause of earthquakes.
What is the elastic rebound hypothesis?
200
The 4 lines of evidence supporting the continental drift theory
What are the continental puzzle, matching fossils, rock types and structures, and ancient climates?
200
______ ______has the highest silica and gas content
What is rhyolitic lava
200
Fossils found in the top soil layers are _______ than the deeper soil layers.
What is younger
200
__________ began to accumulate in the atmosphere 2.5 billion years ago.
What is oxygen?
300
Instrument that record earthquake waves.
What is a seismograph.
300
The missing piece of Wegener's continental drift puzzle
What was the mechanism of continental movements?
300
The ropy, fast-moving lava
What is Pahoehoe?
300
Carbon dating uses this isotope of Carbon.
What is Carbon-14
300
Marine life was the first to evolve, followed by __________, then ___________ which had shelled eggs, and finally ___________, which were warm-blooded, had mammary glands, and more efficient heart and lungs.
What are amphibians, reptiles, and mammals.
400
_______ waves originating from one side of the Earth can be detected on the other side
What are P waves?
400
The main cause of plate motion.
What is the convective flow of magma?
400
The largest batholith in California
What is the Sierra Nevada?
400
Carbon dating is limited to samples less than _______ years old.
What is 30,000
400
Amphibians thrived because they did not have any competition or ____________ on land.
What are predators?
500
__________ __________ can be explained only if the core of the Earth is made from a different material from the mantle.
What is shadow zone?
500
The last time Pangea existed as one giant landmass.
When was 250 mya?
500
The volcano model one of the groups made is this type of volcanoes.
What is cinder cone?
500
Geologic timescale of billions of years allow a long enough timespan for both of these theories.
What are continental drift and evolution?
500
Another name for shelled egg
What is amniotic egg?
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