C12: L12 &L3 Flashcards
(34 cards)
The ___of Earth gives us day and
night.
rotation
The ___around the Sun
defines a year.
revolution
the ___ brings us
the seasons.
axial tilt
Earth rotates on its ___— an imaginary line that runs from the North Pole to the
South Pole.
axis
takes about 24 hours and it is responsible for the cycle of day and
night.
rotation
rotation is ____when viewed from above the North Pole, which is why the sun appears to rise in the ___and set in the ___.
counterclockwise;
east; west
While rotating, Earth also revolves around the sun in an ___
elliptical orbit (oval-shape).
revolution journey takes about __ days, giving us the length of ___year.
365.25; one
Earth travels at an average speed of about ___kilometers per hour.
107, 000
The slight
___and ___of Earth combine to produce varying solar intensities during different
times of the year, contributing to seasonal changes.
tilt; elliptical path
Earth’s axis is tilted at an angle of __
degrees relative to its orbital plane
23.5
During the month of __, the Northern
Hemisphere is tilted ___the sun. This results in longer days, more direct sunlight, and warmer temperatures— which we recognize as
____in the Northern Hemisphere.
June; toward; summer
the Southern Hemisphere tilted ___from the sun, experiencing shorter
days and colder temperatures, resulting in ___
away ; winter
During the ___approximately in the month of March 21-September 23—
neither Hemisphere is tilted toward or away from the sun.
Equinoxes
during Equinox, both hemispheres
receive equal sunlight, and day and night are the same length. These marks are the beginning of the of __ and ___
spring and autumn.
not only causes seasonal temperature shifts but also changes the length
of daylight experienced at different times of the year
axial tilt
Earth is divided into ___ time zones,
each corresponding to ___ degrees of longitude since the Earth rotates 360 degrees in 24
hours.
24; 15;
0 degree longitude
prime meridian
The prime meridian ( 0 degree longitude)in Greenwich, England, serves as the
reference point, known as ___ or ___
Greenwich Mean Time (GMT) or Coordinated Universal Time
(UTC).
Moving east from GMT, each time zone is one hour ___. Moving west, each time
is one hour ___
ahead; behind
clocks are adjusted one hour forward in the spring to extend evening daylight and one hour back in the fall to make mornings brighter.
Daylight Saving Time (DST),
aims to optimize the use of natural daylight and save
energy.
Daylight Saving Time (DST),
subtle changes in Earth’s orbit and rotation, known
as
Milankovitch cycles.
Proposed by Serbian scientist ___in the early 20th century, these cycles explain long-term climate variations.
Milutin Milanković; Milankovitch cycles.
