56 science terms
i will get the rest of the terms later
Terms
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- spit
- a beach formed by longshore drift that projects like a finger out into the water
- trace fossil
- a type of fossil that provides evidence of the activities of anciet organsms
- energy
- the ability to do work or cause change
- absolute age
- the age of a rock given as the number of years since the rock formed
- deflation
- wind erosion that removes surface materials
- oxbow lake
- meander cut off from a river
- sedimentary rock
- the type of rock that is make of harened sediment...layers
- fossil
- the preserved remains of traces of living things
- invertebrate
- the opposite of a vertebrate...an animal without a backbone
- extinct
- a whole species dies and does not come back
- mass exinction
- when a lot of groups of animals die
- cast
- a fossil that is a solid copy of a organism's shape, fromed when minerals seep into a mold
- law of superposition
- the principle that states that younger layers are on top wile the older they are the deeper they are
- paleontologist
- a scientist who studies fossils to learn about organisms that lived long ago
- period (time)
- one of the units of geologic time into which smart people divide eras.
- unconformity
- a place where an old, eroded rock surface is in contact with a newer rock layer
- sand dune
- a deposit of wind-blown sand
- index fossil
- fossils of widely distributed organisms that lived dduring only one short period
- mold
- a fossil formed when an organim buring in sediment dissolves, leaving a hollow area
- stalacite
- calcite deposit that hangs from the roof of a cave
- delta
- a landform made of sediment that is deposited where a river flows into an ovean or lake
- friction
- the force that opposes the motion of one suface as it moves across another surface
- ice age
- times in the past when continental glaciers covered large parts of eath's surface
- abrasion
- grinding away of rock by other rock particles carried in water, ice, or wind
- half-life
- the time it takes for a half of the atoms of a radioactive element to decay
- radioactive darting
- the breakdown of a radioactive element releasing particles & energy
- moraine
- a ridge formed by the till deposited at the edge of a glacier
- flood plain
- wide valley through which a river flows
- vertebrate
- an animal with a backbone
- kinetic energy
- the energy an object has due to its motion
- era
- one of the 3 long units of geologic time between the precambrian and the present
- groundwater
- water that fills the cracks and spacecs in underground soil
- plucking
- the process by which a glacier picks up rock as it flows over the land
- valley glacier
- a long, narrow glacier that forms when snow and ice build up in a mountain valley
- longshore drift
- the movement of water and sediment down a beach caused by waves coming into the shore at an angle
- fault
- a breack or crack
- intrusion
- an igneous rock layer formed when magma hardens beneath earth's surface
- evolution
- the process by which all the different kinds of living things have changed over time
- relative age
- the age of a rock compared (younger or older)
- exturion
- an igneous rock layer formed when lava flows onto earth's surface and hardens
- loess
- a wind-formed deposit made of fine particles of clay and silt
- karst topography
- region in which a layer of limestone close to the surface creates deep valleys and sinkholes.
- petrified fossil
- a fossil in which minerals replace all or part of an organism
- alluvial fan
- wide sloping deposit of sediment formed where a stream leaves a mountian range
- till
- the sediment deposited directly by a glacier
- stalagmite
- cone-shaped calcite deposite that build up on the cave floor
- potential energy
- energy that is stored
- kettle
- small depression that forms when a chunck of ice is left in a glacial till
- carbon film
- a type of fossil consisting of an extremely thin coating of a carbon on rock
- geologic time scale
- a record of the geologic events and life forms in earth's history
- turbulence
- type of movement of water in which rather than moving downstream the water moves every which way
- continental glacier
- a glacier that covers much of a continent or large insland
- load
- the amount of sediment that a river of stream carries
- beach
- wave-washed area with lots of deposited sand
- glacier
- a large mass of moving ice and snow on land
- meander
- looplike bend in the course of a river