Vocabulary 11- Earth and its neighbors

1. Solar System : the sun and the objects that are traveling around it.

2.Planet: any of the eight large bodies that travel around the sun and shine by reflecting its light.

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

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

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

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

7.Resource: any material that helps support life on earth.

8.Hydrosphere: earth's surface.