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62 Cards in this Set
- Front
- Back
Canyon
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a river that flows through a deep narrow valley
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weathering
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process of wearing down or breaking rock into soil, sand, and other small pieces
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erosion
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carries weathered materials way from one place
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Deposition
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drops the materials in a new location
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Delta
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particles of sand are deposited on a large flat area of land at the mouth of a river where the water flows into the ocean
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sand dunes
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large deposits of sand or gravel that were built by the flow of wind or water
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eruption
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melted rock from the earth's crust is released to the surface
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earthquakes
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shaking caused by rock slabs moving against each other deep below the earth's crust.
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landslide
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the sudden downhill movement of a huge mass of rock , soil and mud.
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sedimentary rock
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layers of ancient sand and silt
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decomposition
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decay of organisms into simpler forms of matter. Dead plants and animals.
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fossil fuels`
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heat and pressure change leftover carbon and hydrogen from dead organisms into gas and oil
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soil
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loose material made of rock, minerals and organic matter.
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humus
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deayed or rotting parts of once living things
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natural resources
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materials and energy sources found above, on or below the earth's surface. minerals, water, fossil fuels and food sources are examples
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renewable resources
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pleants, animals, and clean air and water. nature produces again and again
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non-renewable resources
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oil, natural gas and coal, are examples. They cannot by replaced quickly enough for people to use.
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alternative energy
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sources to replace fossil fuels, renewable, inexhaustible resources like water, sun, wind
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Hydroelectric energy
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produced by the energy of water moving through a dam.
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geothermal energy
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produced from the heat of melted rock deep below the earth's surface
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biofuels
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made from plants and animals , called biomass ex wood chips, plants oil and leftover food or waste products
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solar energy
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energy from the sun which is collected with solar panels. the energy is converted to a usable form
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conservation
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smart use and protection of natural resources. reduce, reuse and recycle
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model
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a picture, idea or object that represents and object or process
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fossils
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remains or traces of an organism that lived long ago
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air pressure
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the weight of air pressing on everything around it.
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humidity
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water vapor in the air
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precipitation
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water or ice that falls to earth
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temperature
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a measure of how hot or cold something is.
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weather
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a description of the outside air in a certain place at a certain time
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climate
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the general weather of an area over a long period of time.
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wind
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flow of air , created by the sun heating the air, warm aire expands and rises and cold air condenses and sinks creating wind.
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cold front
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when cold air sinks and warm air rises
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warm front
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warm air mass moves towards a cold air mass
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weather maps
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show fronts with blue triangles for cold and red half circles for warm
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weather symbols
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H and L that represent high or low pressure
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thunderstorm
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weather characterized by strong wind, rain and the presence of lighting ( an electric discharge)
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Hurricane
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a large rotating storm over the ocean with heavy rain and strong winds
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tornado
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rotating cone of air connceted to the ground.
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haze
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accumulation of dust, smoke, and other particles in the air that make it hard to see
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fog
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accumulation of water droplets in the air that make it hard to see
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water cycle
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movement of water between the air and earth. water changes state as it travels.
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evaporation
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heat energy from the sun causes water to change fro a liquid to a gas
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condensation
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water vapor rises, cools,and changes from a gas back to a liquid
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precipitation
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water that falls to earth as rain, snow, sleet or hail
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physical property
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a property that can be observed, measured, or changed without changing the substance
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sun
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a star that is a ball of gas
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axis
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an imaginary line that passes from the north pole to south pole through th eearth's core.
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season
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caused by the earth's tilt and the amount of sun that different parts of the earth receive.
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revolve
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orbit or circle
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rotate
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spin or turn
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mountain
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a large elevated landform that rises abruptly from the surrounding land
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plain
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low area that is flat
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rock
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solid mixtures of c\earth's crust
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gravity
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the force that pulls objects toward each other
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tides
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the twice a day ebbing (lowering) and rising of wather
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new moon
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the moon is in its orbit exactly between the sun and the earth so that the side closed to the earth appears dark. The side that faces the sun is lit up . In this phase we cannot see the moon in the night sky
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first quarter moon
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the moon continues to revolve around the earth. the moon's surface becomes visible as s thin crescent.
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full moon
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the entire side of the moon reflects sunlight back to earth. moon appears as a complete circle
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third quarter moon
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left half of a circle. continues to decreas in size.
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orbits
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moves around a star
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solar system
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all the planets and other objects that orbit the sun.
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