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