Circumference of the Earth
Shape of the Earth
Mass of the Earth
Mass and Weight
Masses of large objects
Mass of the Earth?
Generalizing
Size, mass and density
Hot interior of the Earth
Source of interior heat
Working backwards: age of the Earth
Radioactive Elements
Age of the Earth
Surface of the Earth
Earth’s atmosphere
Atmospheric Pressure
Atmosphere
Atmospheric Effects
Absorption of Light
Reflection of Light
Refraction of Light
Radiation Belts
Northern Lights
Rotation of the Earth about its axis
Rotation about the axis
Rotation about the Sun
Email: jholmes@cbu.edu
Home Page: http://www.cbu.edu/~jholmes/N111/intro.html