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What happens when molten rock cools?

Magma is molten rock material. As magma cools the elements within the magma combine and crystalize into minerals that form an igneous rock. Magma cools either below the surface or at the surface (magma that reaches the surface is called lava). As magma cools igneous rock is formed.

What happens when lava cools and hardens?

Magma that reaches the surface of the earth is called lava. When it cools and hardens, it too forms igneous rock. Igneous rock that is formed on the earth’s surface is described as extrusive.

What happens to the size of the crystals if molten rock takes longer to cool?

If the magma cools quickly, the crystals do not have much time to form, so they are very small. If the magma cools slowly, then the crystals have enough time to grow and become large. The size of crystals in an igneous rock is an important indicator of the conditions where the rock formed.

What happens when magma cools and hardens?

This molten rock, called magma, is like a soup of different minerals and elements. Because magma is less dense (and lighter in weight) than the solid rock around it, it flows upward. The magma cools and hardens. The result is igneous rock.

What is the answer of magma cools slowly?

If the magma cools slowly underneath the surface of the earth it forms granite with relatively large crystals. If the magma cools rapidly on the surface of the earth the rock forms what is called lava.

How long does it take magma to cool?

Based on studies of lava flow cooling rates, it will take more than 130 days for a flow this thick (about 4.5 m, or 15 ft) to cool to a temperature of about 200 degrees Celsius (290 degrees Fahrenheit). (Credit: A.

Is there anything that lava can’t melt?

The short answer is that while lava is hot, it’s not hot enough to melt the rocks on the side of or surrounding the volcano. Most rocks have melting points higher than 700℃. So by the time it’s out of the volcano, lava is generally not quite hot enough to melt the rocks it flows over.

What does it feel like to be burned by lava?

Even in liquid form, most lavas (essentially liquid rock) is more dense and heavier per cubic measure than your body. You’d sink to your ankles or knees depending on its consistency, then fall over and roast to death, briefly but still very painfully until your nerves burnt away.

Is Sirius hotter than the sun?

Sirius is classified by astronomers as an “A” type star. That means it’s a much hotter star than our sun; its surface temperature is about 17,000 degrees Fahrenheit (9,400 Celsius) in contrast to our sun’s 10,000 degrees F (5,500 C).

Are red or blue stars hotter?

Red stars are the coolest. Yellow stars are hotter than red stars. White stars are hotter than red and yellow. Blue stars are the hottest stars of all.

Is white or blue fire hotter?

The color blue indicates a temperature even hotter than white. Blue flames usually appear at a temperature between 2,600º F and 3,000º F. Blue flames have more oxygen and get hotter because gases burn hotter than organic materials, such as wood.

What is the coldest fire?

The lowest recorded cool flame temperatures are between 200 and 300°C; the Wikipedia page references n-butyl acetate as 225°C. You can read a lot more about cool flames on that page.