planet: any of the eight 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 straight line.
lithosphere: the hard, outer layer of Earht, about 100 kilometers thick.
crust: the rocky surface that makes up the top of the lithosphere.
resource: any material that helps support life on Earht.
hydrosphere: Earht's water.
No hay comentarios:
Publicar un comentario