Not acid lava, basic magma.
A cinder cone has basaltic lava, which has a fairly low viscosity.
lava
cinder cone
A cinder cone volcano typically has basaltic lava, which is low in silica content and flows easily. This results in the formation of steep-sided cones made of mostly cinders and volcanic ash.
The lava of cinder cone volcanoes is typically black, dark red, or dark brown in color. This is due to the high iron and magnesium content in the lava, which gives it a darker appearance compared to other types of lava.
No. Cinder cone volcanoes erupt fountains of lava, which is how the cinder cone is built up. Cinder cones that are nearing the end of activity may also produce lava flows.
makes it bigger
Tambora was a composite cone.
Mount Kenya is neither a composite cone, cinder cone, nor a shield cone. It is a complex stratovolcano made up of layers of lava and ash.
when lava flows down it the lava that stayed on it gets hard
Both cinder cone and shield volcanoes are primarily composed of basaltic lava flows. However, cinder cone volcanoes are characterized by steep slopes, smaller size, and built up from pyroclastic material like ash and cinders, while shield volcanoes are much larger with gentle slopes built from numerous lava flows.
Basaltic. There is more gas content than in most basaltic magma so that when a cinder cone erupts, The pressure builds up and makes the eruption somewhat explosive. Tephra, or dried lava/magma, is shot up, and joined to the volcano making it larger.