What causes tides?
A. gravitational attraction of the Sun
B. gravitational attraction of both the Moon and Sun
C. gravitational attraction of the Moon
Answer: B
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The scientific study of rock strata (layers) is known as ________ and based on the principle of ________
A) stratigraphy; superposition B) geomorpholy; uniformitarianism C) Paleontology; catostrophism D) Paleogeography; plate tectonics
What would happen to the velocity of a river if an avalanche dumped rocky debris on its stream bed?
A. The velocity would not change. B. The velocity would increase to erode around and through the rocks. C. The velocity would decrease because the channel roughness had increased. D. The velocity might increase or decrease, depending on the size of the individual rocks involved.
the freezing point of water is _______ on the Kelvin scale.
a - 0 b - 273 c - 60 d - 32 e - -40
Pterosaurs were ____
a. ancestors of birds b. flying dinosaurs c. large and aggressive birds d. flying reptiles e. flying mammals