a loose rock larger than 256 millimeters (10 inches)
the shape that occurs when a rock is split cleanly
loose particles of rock or mineral that are the size of gravel larger than pebbles, but smaller than boulders
sedimentary rock made of rounded pebbles held in together with a matrix
the huge mass in the very center of the Earth made mostly of iron and nickel. It is divided into an outer core and inner core
the solid outermost part of the Earth. The crust is all the land you see and the land on the ocean bottom.
a solid in which the particles are arranged in a pattern to make shapes with flat surfaces
crystals often form regular geometric shapes (cubes, hexagonals, etc.) which can aid in their identification
sudden release of energy built up in an area on the crust or upper mantle sudden ground motion or vibration of the Earth
substances which cannot be broken down into other substances
the location on the surface of the earth just above the focus of an earthquake
the movement of weathered rocks and soil
volcanic rock which solidifies on the surface of the earth rather than inside of the earth
a crack in the earth's crust where earthquakes often occur
the location under the earth's surface where an earthquake occurs
a body of rock with special that allow geologists to map, describe, and name it
something that has lasted from a living thing that died long ago. They can be body parts, that have turned into stone or animal tracks.
a scientist who studies geology
the science of the rocks and minerals that compose the earth, of its structure, and of its history
all sedimentary particles larger than 2 millimeters is called gravel. Gravel is subdivided into pebbles, cobbles, and boulders.
A measure of the ease with which a smooth surface of a mineral can be scratched. See Mohs scale.
rock formed when molten rock has cooled and solidified
igneous rock that forms when magma cools below the Earth's surface
molten rock that flows out onto the Earth's surface
how light reflects off of a rock or mineral
molten rock that is located beneath the Earth's surface
the naturally-occurring electrical field in some rocks
the thick layer of very hot, melted rock between the crust and the core of the Earth
fine-grained material surrounding larger grains in a sedimentary rock
rocks that are changed from sedimentary, igneous or other metamorphic rocks by intense pressure and heat
a non-living, solid material with particles arranged in a repeating pattern called a crystal. A mineral is usually a combination of 2 or more elements. A mineral cannot be broken down into any other substance.
a scientist who studies the identification, properties, and distribution of minerals
a scale used to measure the hardness of a mineral
Loose particles of rock or mineral that range in size from 2 - 64 millimeters in diameter. Pebbles are the smallest type of gravel.
a measurement scale for identifying the amount of energy released by an earthquake
a combination of 2 or more minerals which have been joined either by heat, temperature, pressure, or chemical changes
the process in which igneous, sedimentary, and metamorphic rocks are changed over time
loose particles of rock or mineral that range in size from 0.0625 to 2.0 millimeters in diameter
material that comes from the weathering of rock or from from fragments of plants and animals that settles to the bottom of rivers, lakes, and seas
rock formed from rock types that have weathered, cemented, and/or Photo of aRocksqueezed together
the process of breaking up rocks into smaller fine pieces that sink to the bottom of rivers, lakes, and seas
a scientist who studies the waves created by an earthquake
soft rock formed from layers of mud soil
layers, or bands, in rocks
the color that shows when a mineral is scratched on the surface
igneous rock that forms when magma cools on the Earth's surface
the breaking of rocks by water, snow, ice, wind, chemicals, gravity or plant roots