Scientists know that birds began to evolve prior to the Cretaceous, due to the fossil known as
____________________. Fill in the blank(s) with the appropriate word(s).
Archaeopteryx
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Which body in the solar system has the highest level of volcanic activity?
A. Mars B. Io C. Earth D. Jupiter
What may result from lithification?
A) Sediment becomes a sedimentary rock. B) Metamorphic rock becomes a sedimentary rock. C) Igneous rock becomes a metamorphic rock. D) Sedimentary rock melts.
Which of the following best describes a knot (unit)?
A) wind direction from due north equal to 0°/360° B) a unit of speed equal to one nautical mile (1.85 km) per hour C) a unit of solar radiation received at top of Earth's atmosphere, equal to 1370 watts per square meter D) a unit of atmospheric pressure equal to 1013.2 mb E) a unit of length equal to 300 mm
Stress tending to pull objects apart is ________ stress.
A. compressive B. shearing C. elastic D. tensile