No. Lava flows vary in composition. Most lava flows consist of basaltic lava, which can flow as smooth phoehoe or form jagged and broken a'a. Other lava flows are more viscous and will have blocky surfaces and tend to be short and thick.
No. The fastest lava flows on earth have been recorded at Mount Nyiragongo in the Congo flowing at 60 mph (100 km/h). In most cases, however, lava flows very slowly. Blocky lava flows are the slowest, moving at speeds comparable to glaciers.
A lava flow is where lava flows down the side of a volcano.
Pahoehoe or pillow lava - same thing
it is referred to as lava when it is above ground, when below ground it is referred to as magma
the opening where the lava flows is call a vent
Magma that flows onto Earth's surface is called lava.
Not exactly. Molten rock is called either magma or lava depending on whether it is underground or above ground. When lava flows on the surface like a river or flood it is called a lava flows, but lava is not always flowing downhill. Sometimes it can collect in a pool called a lava lake, or be flung into the air in a lava fountain.
A volcano is a mountain from which lava flows out during an eruption.
Lava flows can be stopped or deflected by ridges, valleys and depressions in the ground.
When lava flows reach the sea, the lava rapidy cools to form an igneous rock.
Yes. Lava flows can be extremely destructive. Since most lava flows move slowly, though, relatively few people have been killed by them.
Yes. Stratovolcanoes can erupt blocky lava flows, basaltic lava flows, or may erupt explosively.