Topic 7 Lesson 1 Earth’s Gravitational Forces

Target Language or Knowledge:

What is the force that pulls objects toward Earth's center? What is the speed needed for a rocket to leave Earth? What slows down a skydiver when the parachute opens? Which object has more mass ? What holds stars in their galaxies? What keeps artificial satellites in their orbits? What force is responsible for the rocket's liftoff? What is the force that pulls a parachute downward? What makes objects fall at different rates in the presence of air? What is the escape velocity needed to leave Earth?

Gravity Air Rocket Sun 11 km/s Air Jump Desk Air Fire Moon Swing Sun Planets Moon Satellites Gravity Rockets Sun Desk Gravity Air Rocket Swing Thrust Jump Swing Desk Gravity Air Moon Sun Air Gravity Rocket Swing 40,234 km/h 11 km/s Parachute Swing