University of Colorado
University of Colorado: Ph Et Interactive Simulations: Gravity and Orbits
An interactive simulation that teaches about gravitational force, circular motion, and astronomy by manipulating the sun, earth, moon, and a space station to observe the effects of gravity and orbital paths. This simulation can either be...
University of Colorado
University of Colorado: Ph Et Interactive Simulations: Gravity and Orbits
Move the sun, earth, moon, and space station to see how it affects their gravitational forces and orbital paths. Visualize the sizes and distances between different heavenly bodies, and turn off gravity to see what would happen without it.
Ambleside Church of England Primary School
Ambleside c.e. Primary School: Your Weight on Other Planets
Students enter their weight here on Earth, and find out how much they would weigh on the moon and other planets.
Enchanted Learning
Enchanted Learning: Earth's Oceans Tides
This site explains what tides are and the difference between Proxigean Spring Tides, spring tides, and neap tides, and how these are formed. Graphic illustrations are provided.
Physics Classroom
The Physics Classroom: Cavendish and the Value of G
A short description of how Cavendish measured the value of G - the universal gravitation constant and supported Newton's theory. Illustrated.