Scale model for satellite orbits
In this activity, students use a scale model of the Earth and identify altitudes of various satellites. They then use a smaller object on a string to model gravity and satellite motion.
By the end of this activity, students should be able to:
describe how far above the surface of the Earth satellites orbit
demonstrate different types of orbit
explain that the attraction of gravity always pulls satellites towards the centre of the Earth and that this force causes circular motion
demonstrate how a satellite will move in a circular orbit only if it is travelling at the right speed.
"I LOVE LOVE this lesson activity. ... Can't wait to draw scale models with my class and have them understand gravity."
Wendy Dumée, Teacher
Download the Word file for:
introduction/background notes
what you need
what to do
discussion points
extension ideas.
Download the Excel spreadsheet for scale distances in space.
Related content
Prior to this activity, explore some of the big science ideas and concepts behind gravity and satellite motion and also what it takes to launch a satellite (gravity, circular motion and atmospheric drag for starters).
Activity ideas
Get your students to turn their eyes to the night sky to observe natural satellites and to spot artificial satellites – like the International Space Station (ISS) – as they pass overhead.
