Earth’s Motions - Neshaminy School District › cms › lib6 › PA01000466 › Centricity › Do… · Revolution The movement of one object around another is called revolution.

Earth’s Motions

Earth moves through space in 2 major ways:

ROTATION

REVOLUTION

and

ROTATION

Earth spinning on its axis is called

The is an imaginary line

passing through Earth’s center

through the North and South

The North Pole points toward

the star (the North Star)

The axis is tilted

rotation.

“AXIS”

poles.

Polaris

23.5o

DAY AND NIGHT

rotation

(In the Northern Hemisphere)

The sun and stars rise in the and set in the

.

Time of Complete Rotation = ~

Speed at Equator = ~1 mile every

= miles per hour

Counter-clockwise

East

West

24 hours

3 seconds 1,038

Revolution

The movement of one object around another is

called revolution.

One complete revolution of Earth around the sun

is called a year

1 revolution = 365.25 Days (LEAP YEAR?)

Rate of Revolution = 66,000 mph

Earth revolves around the sun in a path called its

orbit (Counterclockwise direction).

Earth’s orbit is not a circle – it is an ellipse (a

circle that is longer than it is wide)