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When molten rocks cool instantly, they often form volcanic glass, such as obsidian, due to the rapid solidification that prevents the formation of crystalline structures. This process typically occurs during volcanic eruptions when lava comes into contact with water or air, cooling it quickly. The result is a smooth, shiny texture, and a lack of visible mineral grains. Instant cooling can also trap gas bubbles, leading to a porous structure in some volcanic rocks like pumice.
What else can I help you with?
Molten rocks that cool at the earths surface are known as?
Lava.
What type of crystal grain forms when molten rocks cool slowly?
Quartz
What type of crystal gain that forms when molten rocks cool slowly?
Intrusive
Are magma and lava sedimentary rocks?
No. Magma and lava are molten rock. When the cool they form igneous rock.
How do rocks get a sandpaper texture?
The texture of a rock is determined by the rate it takes the molten to cool to form the rock.
Molten rocks that cool at the earths surface are known as?
Lava.
What type of rocks form when molten rocks cool and solidify?
Igneous Rock
Where are rocks came from?
when lava emerges on out of mountain then the molten lava cool to form rocks.
When molten rocks are cool quickly what type crystals formed?
large
When molten rocks cool it becomes what kind of rock?
igneous rock.
What type of crystal grain forms when molten rocks cool slowly?
Quartz
What type of crystal gain that forms when molten rocks cool slowly?
Intrusive
Are magma and lava sedimentary rocks?
No. Magma and lava are molten rock. When the cool they form igneous rock.
How do rocks get a sandpaper texture?
The texture of a rock is determined by the rate it takes the molten to cool to form the rock.
How do igneous rocks form?
Igneous rock forms from the cooling of molten material called magma or lava.
Which type of rock contains minerals arranged in crystals and forms when molten rocks cool and turn solid?
Igneous.
As molten rocks cool elements combine to form minerals?
Yes, during the cooling of molten rocks, different elements join together to form minerals through crystallization. The specific minerals that form depend on the composition of the molten rock and the cooling rate. This process is responsible for the diversity of minerals found in igneous rocks.
