Chris+Bennett's+Scratch+for+Gold

I was interested in finding some Scratch projects that related to science and I was lucky enough to find this page which is filled (17 pages worth) with many terrific projects, but be careful, some are in English and some are not.

There is one called Balancing Balls: The designer created a game where the player is challenged to balance balls of varying weights on a seesaw type platform. Points are awarded for how long the player is able to keep them balanced and also for increasing the weight.

This page also includes the science behind the game (see excerpt below) //--The Physics behind this:// //This project uses torque and gravitation forces to simulate what would happen in real life.// //The balls move according to MGcos0. Mass is your weight, with it being in KG. Starting weight is .1 KG. G is Gravity, or 9.8 meters/sec^2. I converted this to .98 units on the grid. 0 is theta, or the degree of the board.// //The board rotates using torque. Torque is the cross product of force and distance, or FxD. Unfortunately, this project assumes that the force is always at right angles with the distance, as it takes complicated rotary motion and related rates to fix it. I then added up all of the torques from each ball, and then changed the angle by it.//

[] (Balancing Balls)

If you are a science teacher this page really is Gold! Here is the link for more- enjoy! []

I also loved "Kid Rocket- A World Without Friction or Gravity" as a way to understand how forces applied in space impact an astronaut's direction and velocity. Check it out at: []

Even this one, which is not in English is very well done and the science is universal: []