Nile river: The farmers had to be ready to plow and plant their fields along the banks of the river.
Rotation: Earth's spinning on its axis: Earth has seasons because it's axis is tilted as it moves around the sun.
Calendars: They us the stars so they no we it has den 365 days.
Seasons: We have 4 seasons because the Earth is at a tilted.
Earth's tilt: The Earth is tilted at a 23.5 degrees.
June: It is summer in the northern hemisphere and winter in the southern hemisphere.
December:It is summer in the southern hemisphere and winter in the northern hemisphere.
March: The neither hemisphere is tilted to the sun or tilted way.0
september:The neither hemisphere is tilted way the sun or tilted to way.
moon motion around earth and on its axis: The moon takes 27.3 days to revolve around the Earth.
phases: it has 8 different ways left rite up down.