On the H-R diagram, our Sun is a

A. relatively bright, blue star.
B. white dwarf.
C. red supergiant.
D. star of average luminosity and temperature.


Answer: D

Environmental & Atmospheric Sciences

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Why is the Mid-Atlantic Ridge important to geologists?

A) It is a divergent boundary, causing the Atlantic Ocean to widen by about 5 centimeters each year. B) Massive earthquakes take place there every day. C) It is the source of tsunamis. D) Plate subduction occurs, shrinking the Atlantic ocean about 5 centimeters each year.

Environmental & Atmospheric Sciences

What is the principal source of recharge in the Basin and Range aquifers? What will be an ideal response?

Environmental & Atmospheric Sciences

Which of the following is an antagonist of the N-methyl-D-aspartate (NMDA) site?

A) g-aminobutyric acid B) phenylcyclidine C) taurine D) none of these

Environmental & Atmospheric Sciences

The Challenger Deep of the Mariana Trench is named for the H.M.S Challenger, the ship that first measured it

Indicate whether this statement is true or false.

Environmental & Atmospheric Sciences