How does earth's rotation and revolution affect which stars and constellations we see.

Constellations Changing Positions. Due to the earth's rotation, stars appear to move. As the Earth rotates from west to east, the stars appear to rise in the East, moving across south to set in the west. The Sun will appear to move through the stars, making one complete circuit of the sky in 365 days

Fresh water that can be used directly by people, animals and plants.