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Which texture is formed when lava/magma cools slowly?
Coarse-grained texture
Obsidian
Crystals have less time to grow, meaning less crystals
Igneous rocks that come out as lava and cools ON the Earth's surface
Igneous rocks that stay as magma and cools underground
Speed of cooling
Igneous
No, they can also be found by erosion/weathering
What determines an igneous rock's texture?
Coarse-grained texture
Obsidian
Crystals have less time to grow, meaning less crystals
Igneous rocks that come out as lava and cools ON the Earth's surface
Igneous rocks that stay as magma and cools underground
Speed of cooling
Igneous
No, they can also be found by erosion/weathering
Example of extrusive rock is...
Coarse-grained texture
Obsidian
Crystals have less time to grow, meaning less crystals
Igneous rocks that come out as lava and cools ON the Earth's surface
Igneous rocks that stay as magma and cools underground
Speed of cooling
Igneous
No, they can also be found by erosion/weathering
What happens when magma/lava cools quickly?
Coarse-grained texture
Obsidian
Crystals have less time to grow, meaning less crystals
Igneous rocks that come out as lava and cools ON the Earth's surface
Igneous rocks that stay as magma and cools underground
Speed of cooling
Igneous
No, they can also be found by erosion/weathering
Which type of rock is heated enough to melt and eventually cools?
Coarse-grained texture
Obsidian
Crystals have less time to grow, meaning less crystals
Igneous rocks that come out as lava and cools ON the Earth's surface
Igneous rocks that stay as magma and cools underground
Speed of cooling
Igneous
No, they can also be found by erosion/weathering
What are extrusive igneous rocks?
Coarse-grained texture
Obsidian
Crystals have less time to grow, meaning less crystals
Igneous rocks that come out as lava and cools ON the Earth's surface
Igneous rocks that stay as magma and cools underground
Speed of cooling
Igneous
No, they can also be found by erosion/weathering
Can intrusive igneous rocks only be found by digging?
Coarse-grained texture
Obsidian
Crystals have less time to grow, meaning less crystals
Igneous rocks that come out as lava and cools ON the Earth's surface
Igneous rocks that stay as magma and cools underground
Speed of cooling
Igneous
No, they can also be found by erosion/weathering
What are intrusive igneous rocks?
Coarse-grained texture
Obsidian
Crystals have less time to grow, meaning less crystals
Igneous rocks that come out as lava and cools ON the Earth's surface
Igneous rocks that stay as magma and cools underground
Speed of cooling
Igneous
No, they can also be found by erosion/weathering
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