How are standard candles used to measure distance?
What will be an ideal response?
A standard candle is an object with a known luminosity or absolute magnitude. Distance can be found by comparing the absolute and apparent magnitudes using the magnitude-distance relation.
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What is the importance of the carbon dioxide (CO2 ) cycle?
A) It makes the growth of continents possible. B) It allows for an ultraviolet-absorbing stratosphere. C) It regulates the carbon dioxide concentration of our atmosphere, keeping temperatures moderate. D) It will prevent us from suffering any consequences from global warming.
How do we know that the interior of jupiter is a liquid metallic material?
What will be an ideal response?
What is the structure of Jupiter like?
a. thin atmosphere, rocky core b. thick atmosphere, rocky core c. gaseous on the outside, then liquid hydrogen, more dense metallic hydrogen, rocky core d. gaseous on the outside, then liquid hydrogen, then helium, then the other elements
Which of the following explains why navigators prior to a few hundred years ago found it much more difficult to determine longitude than latitude?
A) Determining longitude requires an accurate clock, but latitude does not. B) Determining longitude requires mathematical techniques that were not known at the time. C) Determining longitude requires much more precise measurements of angles in the sky than does latitude. D) Determining longitude requires accurate tables of the celestial coordinates of stars, while determining latitude does not.