Download Movement of Earth

Movement of Earth
Why do our seasons change?
Our Solar System is Heliocentric
because the SUN is at the center
of the Solar System. Earth and
the other planets revolve around
the Sun. Copernicus discovered
this.
Layers of the Sun
 Rotation is the spinning of a moon or planet on its
AXIS
 Revolution is planets movement around a star or
moons movement around a planet.
Rotation V/S
Revolution
Rotation
Our Moon rotates once (3600) every 27 days, 8 hours 27.3 days
 Viewed from above our solar system, Earth Rotates once
every 23 hours and 56 minutes. Because we are also
revolving, from our perspective on Earth it rotates once
every 24 hours, this is the length of our day.
 Earth’s Rotation causes day and night.
Revolution
 Revolution is a planets movement around a star or a
moons movement around a planet.
 The path of that planet or moon is called an
 All planets in our solar system have an
(more oval than round)
orbit.
Elliptical orbit,
Earth and Moon’s Revolution
 Our Moon’s revolution period is 27.3 days,
this is why we see moon phases.
 Because our Moon’s rotation and
revolution periods are the same, we
always see the same side of our Moon!
 Earth’s revolution period is 365.25 days
2. The tilt of our Earth
 The imaginary line
that runs through
Earth’s poles is
called its axis.
 Earths axis is
tilted 23.50
3. Seasons change due to the tilt of Earth and
Revolution around our Sun.
 When either the northern or southern hemisphere
receives more sunlight, the temperatures increase,
when it receives less sunlight, the temperatures
decrease.
 Less sunlight= Winter
More sunlight= Summer
4. Solstices and Equinoxes
 Winter Solstice occurs on December 21-22, we receive the
shortest length of sunlight hours.
 Summer Solstice occurs on June 20-22, we receive the longest
length of sunlight hours.
 Equinoxes occur on March 20-21 and on September 22-23, the
equator receives 12 hours of light and 12 hours of darkness.
5. Apogee and Perigee
 When the moon is closest
to Earth it is called
Perigee
 When the moon is farther
from Earth it is called
Apogee
6. Aphelion and Perihelion
 When Earth is closest in orbit to the Sun is is called
Perihelion, this is during our winter.
 When Earth is farthest in orbit from the Sun is is called
Aphelion, this is during our summer.