Vocabulary #11 - Earth and Its Neighbors

Solar system: the Sunan the objects that are traveling around it.



Planet: any of th nine large bodies that travel around the Sun and shine by reflecting its light.



Gravity: a force of attraction, or pull, between any object and any other objects around it.

    

Inertia: the tendency of a moving object to keep moving in a straight line.

 

Lithosphere: the hard, outer layer of Earth, about 100 kilometers thick.



Crust: the rocky surface that makes up the top of the lithosphere.



Resource: any material that makes up the top of the lithosphere.



Hydrosphere: Earth's water.