Compare Gravity Scales Practice Test

A class uses a simple model with three interactions:

Local: a 10 kg backpack and a 1 kg textbook on a table.

Solar system: Earth and the Sun.

Galaxy: the Sun and the Milky Way’s center.

Which statement about gravity across scales is supported by the model?

A teacher shows a simple model list of objects with very different masses: a pebble, Earth, the Sun, and the Milky Way galaxy. Students discuss gravity at the local scale (pebble near Earth), the solar system scale (Earth–Sun), and the galaxy scale (Sun–Milky Way center).

Which claim is incorrect?