Cepheid Variables are stars whose brightness varies in a predictable manner so that the absolute magnitude of the star can be determined, and this allows the ________ of the star to be determined
A) size
B) composition
C) distance from Earth
D) direction of motion
E) velocity
C
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The major cause of a reduced human life span today is
a. Poverty b. Smoking c. Cancer d. high cholesterol e. Driving
Consider the scenario in which peas are planted in Ontario on May 1. If the peas need 1200 growing degree-days before they can be picked, and if the mean temperature for each day from May to July is 21°C, in about how many days will the peas be ready to pick? (Assume a base temperature of 4°C).
A. 70 B. 30 C. 120 D. 40
Which numbered site is likely to have exposure of crystalline rocks?
A) 1, the continental shield
B) 2, the continental platform
C) 3, a basin in the continent
D) 4, a continental shelf
E) 5, a deep sediment-filled basin next to the continent
The surface air around a strengthening low pressure area normally __________, while aloft,
above the system, the air normally __________. a. diverges, diverges b. diverges, converges c. converges, converges d. converges, diverges