2.1 Seasons

Front

Two times of year when the day and night lengths are about 12 hours. Equal day and night.

Back

Equinox

Front

This occurs in March and marks the beginning of spring in North America. Also called spring equinox.

Back

Vernal equinox

Front

This occurs in September and marks the beginning of fall in North America. Also called fall equinox.

Back

Autumnal equinox

Front

Two times of year when the day or night lengths are at their longest or shortest. The Earth is either tilted towards or away from the sun at 23.5 degrees.

Back

Solstice

Front

This occurs in December and marks the beginning of winter in the Northern Hemisphere. This is also the shortest day of the year in the NH.

Back

Winter Solstice

Front

This occurs in June and marks the beginning of summer in the Northern Hemisphere. This is also the longest day of the year in the NH.

Back

Summer Solstice

Front

Because the year has 365 1/4 days a year we add on day to the calendar every four years.

Back

Leap Year

Front

Length of day and Angle of the sun

Back

What are the two things that change throughout the year because the Earth is tilted on its axis as it revolves around the sun?

Front

The days are longer and the angle of the sun is more direct (90 degrees) causing warmer temperatures.

Back

Why are summer temperatures higher (hot)?

Front

The days are shorter and you receive indirect light from the sun causing cooler temperatures.

Back

Why are winter temperatures lower (cold)?