Generally, false. Intrusive rocks cool far more slowly than extrusive ones, so the crystals have time to grow larger.
False. Intrusive igneous rock forms underground when magma cools and solidifies slowly. Extrusive igneous rock forms when magma erupts onto the Earth's surface and cools quickly.
false
False. Igneous rocks can form both beneath the Earth's surface, where they are called intrusive or plutonic rocks, and on the surface from volcanic activity, known as extrusive or volcanic rocks. Intrusive rocks crystallize slowly from magma deep within the Earth, while extrusive rocks solidify quickly from lava that erupts onto the surface.
No, igneous rocks can form both beneath and above the Earth's surface. Intrusive igneous rocks form beneath the surface as magma cools and solidifies underground. Extrusive igneous rocks, on the other hand, form on the Earth's surface when lava cools and solidifies quickly.
False. Igneous rocks are primarily classified by their origin (intrusive or extrusive) and their mineral composition, rather than their texture or shape. Texture can be a characteristic used to further describe igneous rocks, but it is not a primary method of classification.
True. Intrusive igneous rock, also known as plutonic rock, forms larger crystals because it cools slowly underground. Extrusive igneous rocks cool rapidly on the Earth's surface, forming smaller crystals.
Rocks usually contain a mixture of minerals.
Yes, magmas can be classified as intrusive or extrusive. Intrusive magmas cool and solidify beneath the Earth's surface, forming intrusive igneous rocks like granite. Extrusive magmas erupt onto the Earth's surface and solidify quickly, forming extrusive igneous rocks like basalt.
False. Intrusive igneous rock forms underground when magma cools and solidifies slowly. Extrusive igneous rock forms when magma erupts onto the Earth's surface and cools quickly.
false
The statement is true.
False. Igneous rocks can form both beneath the Earth's surface, where they are called intrusive or plutonic rocks, and on the surface from volcanic activity, known as extrusive or volcanic rocks. Intrusive rocks crystallize slowly from magma deep within the Earth, while extrusive rocks solidify quickly from lava that erupts onto the surface.
No, igneous rocks can form both beneath and above the Earth's surface. Intrusive igneous rocks form beneath the surface as magma cools and solidifies underground. Extrusive igneous rocks, on the other hand, form on the Earth's surface when lava cools and solidifies quickly.
False. Igneous rocks are primarily classified by their origin (intrusive or extrusive) and their mineral composition, rather than their texture or shape. Texture can be a characteristic used to further describe igneous rocks, but it is not a primary method of classification.
True. When magma cools quickly, such as during a volcanic eruption, there is less time for mineral crystals to grow, resulting in smaller crystals. Conversely, slower cooling allows for larger crystals to form, as there is more time for the minerals to crystallize and arrange themselves.
False. Granite is an intrusive igneous rock and so commonly cools slowly so has time to develop moderate to large crystals.
false