1. Motion of the Earth
C.B.PRASAD
K.V. KHAGAUL

2. Review What does the solar system consist of? 1) Sun 2) Planets
What is at the center of the solar system?
1) Sun
2) Planets
3) Asteroids
4) The natural satellites of the planets
5) Comets
6) Interplanetary dust
7) Meteoroids
Sun

3. Axis
An imaginary line which runs through both
poles of a planet.

4. Rotation of the Earth The Earth is spinning upon a central axis.
The Earth's axis is tipped over about 23.5° from the vertical.
The Earth rotates around once in 24 hours.

5. Direction of the Rotation
In which direction does the earth rotate?

6. Revolution of the Earth
The earth revolves around the sun.
The orbit is elliptic.
The Earth's tilt stays constant.
The Earth completes one revolution in 365 days.

7. Period of Revolution Planets Period of Revolution Around the Sun
Mercury
87.96 Earth days
Venus
Earth days
Earth
days
Mars
Earth days
Jupiter
Earth years
Saturn
Earth years
Uranus
84.07 Earth years
Neptune
Earth years
Pluto (dwarf planet)
247.7 years

8. Rotation and Revolution Worksheet
Define
How many days does each take?
Which one goes around an axis or orbit?