Navigators can find their latitude in the northern hemisphere by measuring the angle from the northern horizon to the north celestial pole
a. True
b. False
Indicate whether the statement is true or false
True
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The most abundant gas in the Earth's atmosphere is
A) helium. B) nitrogen. C) hydrogen. D) oxygen. E) water vapor.
Blood as it enters the lungs has a high concentration of carbon dioxide and a low concentration of oxygen. The blood leaves the lungs with a high concentration of oxygen and a low concentration of carbon dioxide. What are the qualitative concentration gradients of CO2 and O2 in the lungs?
What will be an ideal response?
During which event does the Sun reach its most southern point in the celestial sphere within the Northern hemisphere?
a. nadir b. summer solstice c. vernal equinox d. autumnal equinox e. winter solstice
The identification of "spiral nebulae" as large groupings of stars outside of our own galaxy was proven by ____
a. photographic plates made by Edwin Hubble showing stars and Cepheid variables b. the results of the Shapley-Curtis debate c. Immanual Kant's "island universe" theory d. William Parsons' observation and description of their spiral structure e. Harlow Shapley's observations of their radio spectrum