Exam 4 Igneous Rocks

Igneous rocks that cool quickly on Earth’s surface are ____.

According to the graph, what is the range in depth when iron core melts and solidifies?

What are pegmatites?

A model that illustrates the predictable patterns of mineral formation from cooling magma is __

Diamonds can form only

Extrusive rocks, which cool more rapidly than intrusive rocks, are generally more ____.

As the water content of rock increases, the melting point ____.

Magmas are classified as basaltic, andesitic, or rhyolitic.

Igneous rocks tend to be

Silica is the most abundant compound found in magma.

Ore deposits such as gold sometimes are found as a(n)

Factors that affect a rock’s melting point include

Which of the following is one of the most durable igneous rocks?

What are kimberlites?

Why does the spectrum go from light to dark?

Igneous rocks are formed when magma

Igneous rocks that cool slowly beneath Earth’s crust are ____.

In the laboratory, rocks must be heated from 8000°C to 12,000°C before they melt.

Intrusive igneous rocks form ____.

Igneous intrusions often are associated with valuable

Heat in the upper mantle & lower crust may come from the decay of radioactive elements.

Which of the following is NOT a factor in magma formation?

Igneous rocks are strong because of their

How far into the Earth must you travel to reach a temperature of 3000°C?

Metal-rich quartz veins are formed at the end of