2. OBJECTIVES:
• EXPLAIN HOW THE EARTH’S ROTATION AND REVOLUTION HAPPENS
• YOU WILL KNOW THE TYPES OF MOTION
• DESCRIBE HOW THE ROTATION OF THE EARTH HAPPENS
3. THE TYPES OF
MOTION
1. Earth’s Rotation
-Earth's rotation or Earth's spin
is the rotation of planet Earth
around its own axis, as well as
changes in the orientation of
the rotation axis in space.
Earth rotates eastward, in
prograde motion. As viewed
from the northern polar star
Polaris, Earth turns
counterclockwise.
4. 1. EARTH’S ROTATION
The North Pole, also known as the
Geographic North Pole or Terrestrial
North Pole, is the point in the Northern
Hemisphere where Earth's axis of
rotation meets its surface. This point is
distinct from Earth's North Magnetic
Pole. The South Pole is the other point
where Earth's axis of rotation intersects
its surface, in Antarctica.
Earth rotates once in about 24 hours
with respect to the Sun, but once every
23 hours, 56 minutes and 4 seconds
with respect to other distant stars (see
below). Earth's rotation is slowing
slightly with time; thus, a day was
shorter in the past.
5. 2. Earth’s Revolution
-Earth's rotation period" redirects here. For the
duration of daylight and night, see Daytime.
Revolution is the motion of an object as it moves
around another object in an orbit. This is different
from rotation, which is simply the spinning motion
of an object on its axis. Revolution, is the earth's
orbital motion around the Sun, which takes 365
and 1/4 days to complete. The Earth revolves
around the Sun in a counterclockwise direction.