Homework Help

What is lava made out of?

user profile pic

enotes | Valedictorian

Posted March 3, 2014 at 11:17 PM via web

dislike 2 like

What is lava made out of?

12 Answers | Add Yours

user profile pic

Payal Khullar | College Teacher | (Level 2) Associate Educator

Posted March 4, 2014 at 8:53 AM (Answer #1)

dislike 2 like

Lava is formed from “magma”, which is nothing but a very hot liquid (fluid or semi-fluid) that flows inside the Earth. When a volcano erupts, this magma comes out and reaches the Earth surface, cools down after contact with the atmosphere and finally becomes lava. It can be in the molten form during volcanic explosion and in the solid, crystalized form after the cooling. In its molten form, it has a really high temperature. When it solidifies, the temperature decreases considerably. Lava is mainly composed of crystals, volcanic glass, and volcanic gases. The chemical composition of lava can vary from place to place. However, silicon and oxygen are generally present in the highest amounts. In addition to these, some other elements like aluminum, iron, magnesium, sodium, calcium, titanium, etc. are also found in significant amounts. Igneous rocks could also be formed after the solidification of lava or magma.

Sources:

user profile pic

Jyotsana | Student, Grade 10 | Valedictorian

Posted March 6, 2014 at 12:53 AM (Answer #4)

dislike 1 like

Lava is made up of crystals, volcanic glass and bubbles (volcanic gases). When the magma gets closer to the surface and cool, it begins to crystallize minerals like olivine and form bubbles of volcanic gases. When the lava erupts, it is made up of crystals,   liquid and bubbles.

user profile pic

laurto | Student, Grade 10 | Valedictorian

Posted May 31, 2014 at 8:08 PM (Answer #8)

dislike 1 like

Lava is molten rock. It is formed inside the Earth and is liquefied by a source of heat called geothermal energy. Lava is made up of igneous rocks . 

user profile pic

CaitlynnReeves | Student, Grade 12 | Salutatorian

Posted March 5, 2014 at 2:52 PM (Answer #2)

dislike 0 like

Lava is molten rock that has been crushed and heated in the earth's mantle. When it is below the surface of the earth it is called magma. Magma only becomes lava when it leaks through breaks in the crust. 

user profile pic

decent444 | Elementary School Teacher | Honors

Posted March 5, 2014 at 8:27 PM (Answer #3)

dislike 0 like

It is made out of molten rocks and megma and contains crystals and gases 

user profile pic

atyourservice | Student, Grade 10 | Valedictorian

Posted March 23, 2014 at 4:46 PM (Answer #5)

dislike 0 like

Lava is made out of molten rocks.

user profile pic

zumba96 | Student, Grade 11 | Valedictorian

Posted May 17, 2014 at 10:35 PM (Answer #7)

dislike 0 like

Lava is formed by magma which is molten rocks which includes volcanic gasses 

user profile pic

rachellopez | TA , Grade 12 | Valedictorian

Posted July 14, 2014 at 9:30 PM (Answer #9)

dislike 0 like

Lava is made up of molten rock, which contains crystals, volcanic glass, and volcanic gases. Magma cools as it gets closer to the surface which is what crystallizes the minerals and forms the bubbles (gas). Liquid freezes when the lava erupts, forming the volcanic glas.

Sources:

user profile pic

givingiswinning | Student, Grade 10 | Valedictorian

Posted July 31, 2014 at 11:41 AM (Answer #10)

dislike 0 like

Lava is made out of molten rocks.

 
 
user profile pic

fashionableb1 | Student, Grade 10 | Salutatorian

Posted July 31, 2014 at 11:03 PM (Answer #11)

dislike 0 like

Lava is formed by magma

user profile pic

taangerine | Student, Grade 11 | Valedictorian

Posted August 16, 2014 at 12:02 AM (Answer #12)

dislike 0 like

Lava is made out of silicon, oxygen, aluminum, iron, magnesium, calcium, sodium, potassium, phosphorus, and titanium. But, mainly -- molten rocks. 

user profile pic

fashionableb1 | Student, Grade 10 | Salutatorian

Posted March 24, 2014 at 8:29 PM (Answer #6)

dislike -1 like

molten rocks 

Join to answer this question

Join a community of thousands of dedicated teachers and students.

Join eNotes