An earthquake occurs in California. What is the minimum magnitude an earthquake can have if it is to be picked up by seismographic networks around the world?
A) M 5.5
B) M 7
C) M 8
D) M 9.5
Answer: A
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What is the relationship between two species in which one species benefits from the interaction whereas the other species neither benefits nor is harmed?
Mutualism Commensalism Parasitism Advantagism
Earth's biodiversity remains a reservoir for ________
A) water and waste production by humans B) pests and disease C) habitat extinction and species destruction D) foods and medicines E) oil and coal
On a map showing the age of the seafloor, why are the patterns symmetrical in the Atlantic Ocean but not the Pacific Ocean?
A. Spreading in the Atlantic has been faster than sea-floor spreading in the Pacific. B. Subduction has consumed large areas of old oceanic crust in the Atlantic, more than in the Pacific. C. Spreading along the Atlantic ridge added seafloor to plates on both sides, while subduction has consumed large areas of old oceanic crust in the Pacific. D. Subduction occurred at the same rate along the eastern and western sides of the Atlantic, but not in the Pacific.
Natural bodies of fresh water that are flowing are described by scientists as ________
A) estuaries B) lotic C) tidal basins D) aquifers E) lentic