This diagram shows magnetic stripes on either side of the midocean ridge. How many times did the magnetic field change polarity to form all of the stripes shown here?





A) Twice

B) Three times

C) Five times

D) Eleven times


C) Five times

Environmental & Atmospheric Sciences

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Comparing these two curves on this hydrograph, the solid curve could record



A) a shorter but more intense precipitation event.
B) the response of the stream to urbanization.
C) a more rapid spring snowmelt.
D) All of these are correct.

Environmental & Atmospheric Sciences

What is bottom water? Where and how does bottom water form?

What will be an ideal response?

Environmental & Atmospheric Sciences

Which of the following statements about the structure of benzene is true?

A) All the C-C bonds in benzene are longer than a typical C=C. B) All the C-H bonds in benzene are longer than a typical C-H bond. C) The benzene molecule contains alternating double and single bonds. D) Benzene is a 1:1 mixture of two equilibrating structures.

Environmental & Atmospheric Sciences

What is a main hazard of this type of volcano?

A. destruction by viscous lava flows that can flow far from the volcano B. hot fragments thrown a short distance from the volcano C. burning, building collapse, and suffocation from widely distributed pyroclastic material D. volcanic mudflows and landslides E. relatively small pyroclastic eruptions caused by localized explosions or collapse

Environmental & Atmospheric Sciences