The mass extinctions that occured about 251 million years ago may have been caused by extensive volcanic activity.
a. true
b. false
Ans: a. true
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A projectile is launched at an angle of 15° above the horizontal and lands downrange. What other projection angle for the same speed would produce the same downrange distance?
A) 30° B) 45° C) 50° D) 75° E) 90°
You would be most likely to see a Shiite Muslim in which country?
A) Morocco B) Iran C) Egypt D) Turkey E) Cyprus
In order for a limestone landscape to develop into karst topography, the limestone formation must contain at least 30% if calcium carbonate
Indicate whether the statement is true or false
What is the main type of rocks in the Peninsular Ranges of Southern California and Mexico?
A. granite and metamorphic rocks that formed at depth B. flat-lying sedimentary rocks C. unconsolidated sand and gravel D. volcanic rocks erupted from a large volcano