Magma comes from the top part of the Earth's mantle and from the bottom portion of the Earth's crust. Molten magma is created in different ways and can be formed through the transfer of heat, decompression melting and flux melting. Magma consists of four parts; it is a semi-molten rock mix and is commonly made of dissolved gases, solid rocks, mineralized crystals and a hot liquid base.
Before it reaches the Earth, magma reaches temperatures of between 1,292 and 2,372 degrees Fahrenheit. Magma exits the Earth's crust through volcanoes or other vents and becomes liquid lava, where it eventually cools and transforms into solid igneous rock. Lava has the ability to cause chemical and physical changes to the environment and is also able to influence the creation of entirely new land forms.