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Chapter 3 Vocabulary (BJU6)
Natural Resources
56
Science
6th Grade
09/13/2010

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Term
natural resources
Definition
the materials on Earth that are available for our use, including soil, water, air, minerals & fossil fuels
Term
renewable resources
Definition
a natural resource that is used and can be replaced by natural means in a relatively short amount of time
Term
nonrenewable resources
Definition
a natural resource that is used but cannot be replaced easily
Term
fossil fuels
Definition
an energy resource formed from the remains of plants and animals
Term
petroleum
Definition
a fossil fuel used to heat homes and produce electricity; means "liquid rock" and is the same as crude oil
Term
crude oil
Definition
unrefined oil
Term
refinery
Definition
a factory that separates crude oil into products such as gasoline, kerosene, and diesel fuel
Term
petrochemicals
Definition
chemicals produced from oil
Term
natural gas
Definition
a fossil fuel found in a gaseous state, is often found close to deposits of oil
Term
coal
Definition
a fossil fuel formed from plant material that was quickly buried in sediment
Term
anthracite
Definition
a type of coal that is the best and cleanest grade; burns without smoke and produces almost no pollutants; not common & quite expensive
Term
bituminous
Definition
a grade of coal; most common type of coal; is soft and contains sulfur; large amounts of ash are produced when burned causing pollution; it is plentiful and fairly inexpensive
Term
lignite
Definition
a grade of coal made of partially decayed plant material; is brown and often has pieces of wood in it; is formed in bogs and must be dried out before it can be burned
Term
nuclear energy
Definition
foes not use a fossil fuel; it does depend on nonrenewable resource
Term
uranium
Definition
a mineral necessary to produce nuclear energy
Term
oil slick
Definition
a thick layer of spilled oil that spreads out rapidly
Term
boom
Definition
floatation foam used to gather oil into a contained area
Term
skimmer
Definition
sucks the oil off the water like a huge vacuum cleaner or adheres to the oil and lifts it off the water
Term
sorbant
Definition
material that absorbs the oil like a sponge; usually used for small spills or for the later stages of cleanup of a larger spill
Term
chemical agents
Definition
disperse and break down oil but can be harmful to underwater animals
Term
reservoirs
Definition
a holding area of water located behind a dam
Term
hydroelectric energy
Definition
a renewable energy resource; produced as water flows from a reservoir and turns turbines - the turbines generate electricity
Term
geothermal energy
Definition
energy generated from heat within the earth
Term
wind farm
Definition
an area covered with windmills used to produce power without causing air or water pollution
Term
wind energy
Definition
air movements to generate electrical energy
Term
solar energy
Definition
energy that is produced by collecting sunlight through solar panels
Term
solar field
Definition
a solar collection area that uses reflective mirrors to produce solar energy
Term
mineral
Definition
a solid substance found naturally in the earth's surface; has never been an organic substance
Term
veins
Definition
a concentrated area of specific minerals that have melted and separated into layers
Term
ore
Definition
material that has a usable amount of metal in it
Term
smelting
Definition
the process of separating metal from the other material in which it is found
Term
dross
Definition
non-metal part of of liquid ore that floats to the top
Term
gold
Definition
a soft and shapeable metal; used as jewelry, dentistry, glassmaking, treating arthritis and cancer, a judge of man's wealth
Term
malleable
Definition
soft and shapeable
Term
silver
Definition
metal used mainly for money and jewelry
Term
copper
Definition
a red-orange metal that is also used for money
Term
iron
Definition
a very plentiful and useful metal because it is strong and durable; it has been used to make tools and weapons 
Term
aluminum
Definition
a strong and lightweight metal; most abundant metal in the earth's crust
Term
fallow
Definition
resting fields for a season or year
Term
ground cover
Definition
a low growing crop
Term
contour plowing
Definition
a method used by farmers to help keep water from washing soil away; plowing where farmers plow with the shape of the land
Term
hydrosphere
Definition
all of Earth's water found in lakes, oceans, streams, rivers, soil, ground water and the air
Term
water cycle
Definition
the path that water takes as it travels from land to sky and back
Term
saline
Definition
containing salt
Term
phytoplankton
Definition
small one -celled organisms; they make up the first link in the ocean's food chain and carry on photosynthesis
Term
ground water
Definition
water stored beneath the surface of the earth
Term
aquifers
Definition
layers of sand, gravel or bedrock that hold or move ground water
Term
drawdown
Definition
the falling water level in an aquifer's well when a lot of water is withdrawn
Term
humidity
Definition
water vapor in the air
Term
ice sheet
Definition
a glacier on relatively level land
Term
ice shelf
Definition
an ice sheet that reaches the ocean and continues to float over the water
Term
iceberg
Definition
a piece of glacier, ice sheet or iceberg that breaks off into the ocean and floats independently
Term
sea ice
Definition
frozen ocean water
Term
reduce
Definition
to conserve resources by using less energy
Term
reuse
Definition
to conserve resources by finding new ways to use a product
Term
recycle
Definition
to conserve resources by turning products into other products
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