Midoceanridge Continuous mountain range extending through the ocean basins
Riftvalley Deep central cleft with steep sides
Magma Molten rock material within Earth
Hotspot Persistent fixed source of rising magma
Mapprojection Maintaining spatial relationship between points on a spherical Earth while
transferring to a flat surface
Seamount Peaked or flat underwater mountain rising from the ocean floor
Contourline Connects all points of equal elevation
Contourinterval Vertical distance between elevations on a topographic map
Silicate Chemical composition SiO2
Shield Broad, gently sloped dome shape volcano
Caldera Basin shaped depression usually many times larger than the included vents
Lava Molten rock from fissures or vents
Viscosity Internal resistance to flow
Pyroclasticbomb Volcanic blob larger then 64mm in diameter, spherical shape
Lapilli Pyroclastic material in general, 2-64mm
Vei Volcanic explosivity index
Intrusive Formed from large crystallization of magma under the ground and has coarse grain,
_______ igneous rock
Extrusive Miniscule crystallization of magma above ground and has fine grain, ________ igneous
rock
Seismology Study of earthquakes and Earth’s structure
Earth Science CST Review
Across
1. Maintaining spatial relationship between points on a spherical Earth while
transferring to a flat surface
3. Deep central cleft with steep sides
8. Molten rock material within Earth
9. Broad, gently sloped dome shape volcano
11. Persistent fixed source of rising magma
12. Connects all points of equal elevation
13. Miniscule crystallization of magma above ground and has fine grain,
________ igneous rock
14. Formed from large crystallization of magma under the ground and has
coarse grain, _______ igneous rock
15. Study of earthquakes and Earth’s structure
16. Chemical composition SiO2
18. Vertical distance between elevations on a topographic map
Down
2. Volcanic blob larger then 64mm in diameter, spherical shape
4. Pyroclastic material in general, 2-64mm
5. Basin shaped depression usually many times larger than the included vents
6. Internal resistance to flow
7. Volcanic explosivity index
8. Continuous mountain range extending through the ocean basins
10. Peaked or flat underwater mountain rising from the ocean floor
17. Molten rock from fissures or vents