1- Which of the following phenomena will cause melting to produce magma? 2- The

Question

1- Which of the following phenomena will cause melting to produce magma?

2- The rate of temperature (and pressure) change with depth inside the Earth is called _______.

3- The occurrence of volcanoes at convergent plate boundaries is due to ______ triggering melting in the adjacent mantle.

4- Magma cools from ____.

5- A _______ is a solid, naturally occurring, cohesive substance composed or mineral-like materials.

6- Felsic minerals require lower temperatures to melt. The lower temperature are required to initiate the formation of (rhyolitic) magma, also referred to as ______.

7- Mafic magmas tend to have ______ eruptions.

8- One of the most destructive hazards with composite volcano eruptions are super-heated gases infused with incandescent ash and larger lava fragments racing down steep volcanic slopes called ______.

9- example not a mineral?

10- Extrusive rocks can form close to or at Earth’s surface ______ than intrusive rocks that cool deep within the Earth.

Explanation / Answer

1) for melting to happen , there has to be either a rise in temperature, or decrease in pressure or addition of water

2) geothermal gradient

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