Exam 1 Study Guide
A light-hour is a measure of -✅✅-distance.
The speed of light is approximately - ✅✅-300,000 km/s.
A scientific theory can be shown to be wrong if - ✅✅-scientists gather new
data that contradict its predictions.
✅✅
If Earth's axis were tilted by 5° instead of its actual tilt, how would the seasons
be different than they are currently? - -Winters would be warmer.
During summer above the Arctic circle - ✅✅-the Sun can always be seen.
Circumpolar stars are stars that are - ✅✅-always above the horizon.
✅✅
When the northern hemisphere experiences summer, the southern hemisphere
experiences - -winter.
The latitude of the Antarctic Circle is - ✅✅-66.5° S.
There are _________ constellations in the entire sky. - ✅✅-88
✅✅
At a latitude of +50°, how far above the horizon is the north celestial pole
located? - -50°
Right ascension is a measure of a star's location on the celestial sphere that is
✅✅
most closely similar to which measurement of location on Earth? -
-longitude
✅✅
For a person who lives at a latitude of +40°, when is the Sun directly overhead
at noon? - -never
If you go out at exactly 9 P.M. each evening over the course of 1 month, the
✅✅
position of a given star will move westward by tens of degrees. What causes
this motion? - -the revolution of Earth around the Sun
What does amplitude reveal about light? - ✅✅-brightness
✅✅
How much would you have to change the temperature of an object if you
wanted to increase its flux by a factor of 100? - -3.162 increase
What is the difference between visible light and X-rays? - ✅✅-Wavelength;
X-rays have a shorter wavelength than visible light.
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