Which items are used to show elevation, relief, and slope on a topographic map? Check all that apply. 1. topographic lines
2. contour lines
3. index contours
4. topographic symbols
5. contour interval
6. topographic interval
7. index topography

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

hope this

air enters through the nose, moves through the nasal cavity, the pharynx, the larynx, enters the trachea, moves through the bronchi andbronchioles till the alveoli.