What is the primary source of the material that forms magma deep within the Earth?

New matter created in the Earth's core

Pre-existing rocks that are melted

Water from the oceans that is superheated

Metallic elements from the planet's core

Which of the following statements most accurately describes the origin of magma?

Magma is exclusively formed from the melting of other igneous rocks.

Magma is new material that flows up from the Earth's solid inner core.

Magma can be formed from the melting of any type of existing rock.

Magma is created when seawater mixes with hot minerals on the ocean floor.

The creation of new matter through volcanic activity

The process of chemical weathering on the Earth's surface

The constant recycling of materials within the Earth system

The radioactive decay of elements in the Earth's crust

Exposure to air and water for erosion

Rapid cooling in a sub-zero environment

Being forced deep underground to encounter intense heat

Being compressed by the weight of ocean water