Which algae was responsible for the Lake Erie harmful algae bloom causing our recent water crisis?
A. Anabaena
B. Aphanizomenon
C. Lyngbya
D. Microcystis
Answer: D. Microcystis
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Which of the following was NOT in forming magmas of the main batholith?
a. subduction beneath western North America b. water that caused partial melting of hot mantle c. partial melting of continental crust d. solidification of magma below the surface e. recent normal faulting along the east side of the batholith
Why does sound travel rapidly though the lower well-mixed surface layer?
a. Temperature and pressure are homogeneous b. Temperature and salinity are homogeneous c. It produces high refraction areas d. Density is heterogeneous
Stress is ________.
A. change in volume B. change in length to original length C. regional metamorphism D. force per unit of area
In the solar system, what is Earth’s order away from the Sun?
A. first B. second C. third D. fourth E. fifth