retype this 12-Flowing basaltic lava (molten rock) takes two principal forms, bo

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12-Flowing basaltic lava (molten rock) takes two principal forms, both named in Hawaiian terms. What are those? This texture happens because the lava One form, called aa, is rough and ed with sharp edges. the jagged surface. loses trapped gases, flows slowly, and develops a thick skin that cracks into Pahoehoe: it forms a thln crust that folds and appears "ropy", like coiled, twisted r develops 13-What are the five volcanic landforms? cinder cones, calderas, sheild volcanoes, flood basalt, and composite volcanoes. 14-Volcanic activity occurs in three settings: subduction boundaries Sea-floor spreading centers Hot spots pring 2017 Chapter 9-11 revie... 14 PM

Explanation / Answer

12. Flowing basaltic lava (molten rock ) takes two principal forms, both named in Hawalian terms. What are those?

answer- One form, called aa, is rough and jagged with sharp edges. This texture happens because the lava loses trapped gases, flow slowly , and develops a thick skin that cracks into the agged surface.

Pahoehoe: It forms a thin crust that develops fold and appears "ropy" , like coiled , twisted rope.

13. What are five volcani landforms?

answer- five volcanic forms are

1. Cinder cones

2. Calderas

3. Sheild volcanoes

4. Flood basalt

5. Composite basalt

14. Volcanic activity occurs in three settings

answer- three settings are

1. Subduction boundaries

2. Sea-floor spreading centres

3. Hot spots

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