Earth Science

3. the great circle of latitude perpendicular to the earth's rotational axis
4. forces acting in opposite directions on different parts of the same object or substance
6. a force that acts to pull and object apart
10. a model of an area of the earth's surface
12. the change in state from a solid directly to a gas
13. rock fragments and particles ejected by a volcanic eruption
14. the forces, energy and processes that formed and reshaped the earth's continents
15. a rigid state of matter in which the particles align in a fixed arrangement
16. a substance usually a liquid that dissolves other substances to form a solution
18. the measure of the amount of matter in an object
19. a natural elevation of the earth's surface rising to a summit

1. the variation in elevation within a specific region
2. any change in the shape of a solid due to stresses exerted on the material
5. molten rock that has escaped form the earth's interior
6. a model that attempts to explain a set of observations
7. having to do with molten or formerly molten earth materials
8. anything that has mass and takes up space
9. an intrusive igneous feature that formed when a large volume of magma collected, cooled and solidified within the earth's crust
11. having a high resistance to flow
17. an opening in the crust of the earth through which lava ash, and gases flow