3. Magmas are mainly liquid and contain dissolved fluids such as water; most are less dense than the adjacent solid rock.
Magmas rise toward Earth's surface because they are mainly liquid and contain dissolved fluids such as water; most are less dense than the adjacent solid rock.
![Magmas_rise](https://getvoice.org/?qa=blob&qa_blobid=16253203929241006961)
(Image source - link)