all of it Flashcards
(30 cards)
what happens on December 21st?
winter solstice
during the winter solstice, where do the suns rays strike most directly?
the southern hemisphere
what occurs on June 21st?
summer solstice
during the summer solstice, where do the suns rays strike most directly?
northern hemisphere
what are seasons?
annual cycles of changing weather patterns
what causes seasons?
the tilt of Earth’s axis and its revolution around the sun.
what is it called when neither hemisphere is tilted towards the sun and the lengths of darkness and daylight are equal?
equinox
on what 2 days does the equinox happen?
March 21st, September 23rd
what region does the sun hit directly
equator
how long does one rotation of the earth take?
24 hours
how long does one revolution take?
365 days 1/4
how many degrees is earth tilted on its axis?
23.5 degrees
how can you tell if its summer by looking at the earth
the earth must be tilted towards the sun
how can you tell if its winter by looking at the earth
the earth is tilted away from the sun
how can you tell if its an equinox by looking at the earth
no tilt or away from the sun
if its winter in the northern hemisphere, what is it in the southern hemisphere?
summer
what seasons have an equinox
spring, fall
what seasons have a solstice
summer, winter
how can you tell if its summer in the northern or southern hemisphere
if its in the south, the south pole will be facing the sun, and vise versa for the north. if its in the northern hemisphere, the north pole will face the sun
what seasons have direct sunlight on the equator
equinoxes
vernal equinox?
occurs on March 21, start of spring in northern hemisphere
autumnal equinox
September 22, start of fall in northern hemisphere
summer solstice?
the day the sun is farthest north from the equator, longest day of the year in NH
winter solstice
sun is farthest south of the equator, shortest day of year in NH
