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science test
| Question | Answer |
|---|---|
| two things used to classify rocks | color and texture |
| is a rock that forms from magma | igneous rock |
| is a mixture of molten rock and gases including water vapor which forms underground | magma |
| magma that flows out of volcanoes | lava |
| _______ ___ forms when molten material cools and solidifies either inside earth or at it surface | igneous rock |
| an igneous rock that forms underground hardend magma good example basalt | intrusive rock |
| an igneous rock that forms at earths surface good example cement | extrusive rock |
| is small solid pieces of material that comes from rocks or living organisms | sediment |
| is a rock that forms over time as sediment is squeezed and cemented together | sedimentary rock |
| sedimentary rocks that form form the broken fragments of other rocks | clastic rocks |
| 5 types of clastic rocks | conglomerate, breccia, sandstone, mudstone, shale |
| if the rock fragments consist of gravel and pebbles | conglomerate |
| made up of sharp edged fragments such as those produced in a volcanic explosion | breccia |
| is formed from grains of sand | sandstone |
| if the sediment is primarily mud or silt | mudstone |
| if the clay minerals are aligned so that the rock can be split into sheets | shale |
| chemical sedimentary rocks that form when minerals precipitate out of solution and rainwater dissolves many minerals on the land good example limestone | chemical rock |
| some rocks form as the result of organic processes marine animals such as coral clams and mussels (living organisms) | organic rock |
| the word metamorphic comes form the greek rock for _____ ____ | changing form |
| is a rock that has been changed by temperature pressure or reactions with hot water | metemorphic rock |
| metemorphic rock with crystal arranged in parrell layers or bands | foliated rocks |
| is a series of processes in which in which rocks continue change from one type to the other | rock cycle |
| is the theory that pieces of earths lithosphere called plates move about slowly on top of the asthenosphere | plate tectonics |
| the continents move slowly across earhts surface (wegners theory) | continetnial drift |
| an ancient supercontinent formed about 300 million years ago which later gave rise to todays continents | pangea |
| what supplies the energy or force great enough to move earths plate | convection currents |
| a chain of underwater mountains | mid ocean ridge |
| new oceanic crust is created at MID OCEAN RIDEGES as older crust moves away | sea floor spreading |
| evidence of sea floor spreading | magnetic stripes |
| old oceanic plates sink into the mantle | subduction |
| as plate sinks through a subduction zone it bends forming a depression in the oceanic floor | trench |
| plates move away from each other | divergent boundaries |
| plates come together or collide | convergent boundaires |
| plates slide past each other moving in opposite directions | transform boundary |
Created by:
thomasslagle