Typical ocean waves have periods of ________ seconds
A) 0.01 to 0.5
B) 0.5 to 5
C) 5 to 20
D) 20 to 100
Answer: B
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________ is name given to NEOs composed of rocky and/or metallic material that are best described as
A. Comets; dirty snowballs that are vaporized by the solar wind as they get near the sun. B. Asteroids; small chunks of rock knocked loose from a belt between Mars and Jupiter. C. Bolides; space debris that bounces off of other stuff in space. D. Meteorites; small clumps of cosmic material that originated in the Oort cloud. E. None of these choices are correct.
Magnetic surveys of the oceanic crust revealed a pattern of striped magnetic anomalies in the rocks that are both ____________________ and ____________________ around the oceanic ridges
Fill in the blank(s) with correct word
"All glacial ice must melt slightly before it can become denser." Evaluate this statement
A) This statement is true; especially in Alaska where summers are warm. B) This statement is true. Glacial ice formed by melting and pressure becomes denser than water. C) This statement is false. Snow can go through metamorphosis to ice over time without melting. D) This statement is false. Glacial snow and ice may melt and reform, but they do not get denser.
What is NOT a contributing factor to the economic downturn of 2009?
A) It is the end of a 40-year growth cycle in the stock market. B) It was the peak of a 30-year commodity cycles. C) Peak oil prices and real estate prices collided with a downturn in the stock market. D) The spending wave of the baby boomers came to an end. E) failure of Americans to innovate after the tech boom of the 1990s