Download A) How do objects move in our solar system?

Name:
Aim 27: Rotation and Revolution of the Earth
Date:
Do Now: Thought question…..You’ve seen the sun set and have maybe seen the sun rise. So where does the sun go when
we can’t see it?
What is the Earth’s Axis:
A) How do objects move in our solar system?
Dating way back to early civilizations, celestial objects, such as the sun and the
moon, appeared to move through the sky from east to west. Because people could
not feel the Earth moving, they believes that Earth was located at the center of the
universe, and the sun and planets revolved around it. This model was called the
Earth-centered or
.
Due to detailed observations, this model became unaccepted
Due to detailed observations by astronomers, they soon
realized that the geocentric model was complex and hard to
explain. This allowed them to adopt a similar model called
the _______________________________________. This
model says that our solar system is sun centered and the
planets, including Earth, revolve (orbit) around the sun
while rotating on its axis.
What is the difference between the sun’s location in the geocentric and heliocentric models?
B) What are the two motions of Earth?
Motion
ROTATION
REVOLUTION
Definition
How long does
one full
motion take?
It takes the Earth _________________ to complete
The earth completes one revolution in _____________________. This is equal to
__________ full rotation. This is equal to
____________________. Since Earth’s revolution is not a “true” 365 days, every 4
_________________
years the ¼ days add up to a full day that has to be added on to the calendar. This is
why we have __________________!
How can we
describe the
motion?
What does
this affect?
The motion of Earth’s rotation is from _____________
Earth travels around the sun in an _____________________
to _____________
_____________________. Stars moving across the sky,
___________________. The ____________ of the Earth’s _______________ causes
rising & setting of the sun
the sun to hit the Earth at different ________________. This is why our seasons have a
repeating pattern. The earth is closer to the sun in the ________________ and further
in the _____________. *Distance to the sun DOES NOT cause seasons!
1. How many degrees does the Earth rotate in one day?
one hour?
2. What would happen to the length of day if you could decrease the rotation of the earth?
3. What would happen to the length of day if you could increase the rotation of earth?
a half a day (12 hours)?