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Minerals and Rocks
Chapter 2 Interactive Science 6th Grade
Question | Answer |
---|---|
Igneous rocks are classified by their ____________ (where it is formed) | origin |
Igneous rocks are classified by their ____________ (Size and shape of mineral crystals in the rock) | Texture |
Igneous rocks are classified by their ____________ (minerals are combined to make up a certain rock sample) | Mineral Composition |
Two types of Igneous Rock are _____________________ and ________________ | Intrusive and Extrusive |
________________ igneous rocks form when magma enters a pocket or chamber below the earths surface | Intrusive |
________________ igneous rocks form when magma makes its way to the earths surface | Extrusive |
When magma makes its way to the earths surface the molten rock erupts or flows above the surface as _________ then cools forming rock | lava |
Intrusive Plutonic rocks have ________________________. | large well formed crystals |
Extrusive rocks form when lava erupted to the earths surface have _________________. | small crystal |
Obsidian, basalt, pumice, scoria and volcanic glass are all __________________ types of rocks | Igneous |
An Igneous rock is made as magma ___________. | cools |
gasses in the lava that creates the igneous rock scoria and pumice cool so quickly they have fine holes called ___________. | vesicles |
Volcanic glass cools so _______________ that few or no mineral grains or crystals are formed | Quickly |
Most atoms in volcanic glass are not arranged in ___________ patterns and few crystals are present | orderly |
Basalt is low in silica and has ____________ colors | dark |
Granite is high in silica as the magma cools it is ________ in colors | light |