Earth Cycles

1
Earth Cycles

• Science SOL 3.8
• By Mrs. Miller

2
What is a cycle?

• A cycle is a chain of events that happens over
  and over again in the same order.

3
How does the Earth move?

• The earth has an axis which is an imaginary line
  that runs through the center of the earth.
• The earth spins on its axis. This spinning is
  called a rotation.

4
What causes day and night?

• When the earth spins...
• The half of the earth that is facing the sun is
  having day.
• The half of the earth that is facing away from
  the sun is having night.

Day
Night
5
What is an orbit?

• An orbit is a curved path that an object follows
  as it moves around another object.
• The earth follows an orbit around the sun.

6
Revolutions

• When the earth makes one complete orbit around
  the sun, it is called a revolution.
• It takes one year, 365 days, for the earth to
  orbit the sun.