1. Earth Demo
The movements of the Earth cause day and night, as well as the seasons.
We will explore Earth’s movements.
Model rotation.
Model revolution

2. Earth Name the shape of the Earth. Sphere
Examples: basketball, baseball

3. Earth Describe why most objects in space are spheres.
All objects are attracted by gravity to the center.

4. Earth
Define Axis.
Imaginary vertical line around which the Earth spins.

5. Earth Define Rotation. What causes day and night? Earth’s rotation
The spinning of the Earth on its axis.
What causes day and night?
Earth’s rotation

6. Earth
How many hours does it take for the Earth to complete one rotation?
24 hours
How many rotations does the Earth complete in one year?
About 365

7. Earth counterclockwise
Which way does the Earth rotate? Imagine being on the ceiling looking down on the classroom.
counterclockwise
(to the left)

8. Earth
It takes 365 days for Earth to travel around the Sun once, so how far does it travel in one day?
1/365th
How many degrees in a circle?
360
So about how many degrees does the Earth travel in one day?
One degree

9. Earth Describe a Magnetic Field.
The movement of material inside Earth’s core, along with Earth’s rotation, generates a magnetic field.

10. Earth Define Revolution. What causes seasons? Earth’s revolution
One complete orbit around the Sun.
What causes seasons?
Earth’s revolution