Earth orbits the sun on a tilted axis. Different

hemispheres face the sun at differenttimes. At any time during the summer or winter, one part of the planet is more exposed to the sun. This exposure

changes as Earth spins in its orbit.

Earth’s seasons happen because of the tilt of the Earth’s axis. This tilting is what gives

usthe four seasons of the year.

SpringSummerAutumn

Fall

The northern and southern hemispheres have opposite seasons in the same

month.It is summer in the hemisphere that is

tilted towards the sun and winter in thehemisphere that is tilted away from thesun.

The length of the days change Summer is warmer than winter

Two days of the year have equal periods of sunlight and darkness. These days are called equinoxes.

March 20th or 21st

September 22nd or 23rd

Solstices are the days when the sun reaches its farthest northern and

southern declinations.

Solstices happen twice a year:December 21st or 22nd

June 20th or 21st

A. StraightB. TiltedC. Parallel

A. Spring, Hemisphere, Autumn, WinterB. Summer, Spring, Winter, SolsticeC. Winter, Autumn, Summer, Spring

A. HemispheresB. SolsticesC. EquinoxesD. Direct days

A. EquinoxesB. Southern HemispheresC. Acute DaysD. Solstices