Question

1. in which direction do stars appear to move across the sky for an observer on earth? a. from north to south b. from west to east c. from east to west d. from the celestial pole to the horizon 3. what determines whether a star is circumpolar, a rise and set star, or a never - rise star for an observer? a. the stars size and brightness b. the observers latitude c. the season of the year d. the phase of the moon 4. according to the passage, what is true about circumpolar stars? a. they always rise and set during the night b. they are only visible at the equator c. they are always above the horizon d. they follow a straight path in the sky 5. how does the angle at which rise and set stars appear relate to the observers latitude? a. it equals the observers latitude b. it is 90° minus the observers latitude c. it is always 45° regardless of location d. it changes daily based on earths rotation

Explanation:

• For question 2, Earth rotates from west - east, so stars appear to move from east to west relative to an Earth observer.
• For question 3, the observer's latitude determines whether a star is circumpolar, rises and sets, or never rises as it affects the visible celestial sphere.
• For question 4, circumpolar stars are always above the horizon for a particular observer.
• For question 5, the angle at which rise - and - set stars appear is 90° minus the observer's latitude.

Answer:

1. C. From east to west
2. B. The observer's latitude
3. C. They are always above the horizon
4. B. It is 90° minus the observer's latitude