3 summey

Energy Resources




As the explore activity showed, you use a number different energy sources each day.
the heat from burning fossil fuels can be used directly to heat homes, schools, businesses, and factories.










Living things and their environment.

The explore activiy showed how living things and nonliving things interact in an ecosystem.
The right abiotic factors help make it possible for the organisms, or living things, in an ecosystem to survive.






food chain and food web

The Explore Activity showed that change in one population can affect several other population in the same ecossystem. This competition means that,in a ecosystem,many small food chains may overlab each other

Vocabulary # 16 - Earth's Watter Supply

Desalination: getting fresh water from seawater.

     












Water cycle: the continous movement of water between Earth's surface and the air, changing form liquid to gas to liquid.



Groundwater: water that seeps into the ground into spaces between bits of rcok and soil.



Water table: teh top of the water-filled spaces in the ground.



Aquifer: an underground layer of rock or soil filled with water.



Spring: a place where ground-water seeps out of the ground.

   

Well: a hole dug below the water table that water seeps into.



Reservoir: a storage area for freshwater supplies.

Vocabulary # 15 - Earth's Atmosphere

Renewable resource: a resource that can be replaced in a short period of time.

  

Ozone layer: a layer of ozone gas in the atmosphere that screens out much of the Sun's UV rays.

  

Fossil fuel: a fuel formed from the decay of ancient forms of life.

 

Smog: a mixture of smoke and fog.





Acid rain: moisture that falls to Earth after being mixed with wastes from burned fossil fuels.

Vocabulary # 14 - Earth's Rocks and Soil

Rock: a naturally formed solid in the crust, made up of one or more minerals.



Igneous rock: a rock formed when melted rock material cools and hardens.

    

Sedimentary rock: a rock made of bits of matter joined together.

   

Fossil: any remains of imprint of living things of the past.

    

Metamorphic rock: a rock formed under heat and pressure from another kind of rock.

    

Humus: decayed plant or animal material in sil.

     

Pollution: adding any hrmful substances to Earth's land, water, or air.

     

Rock cycle: rocks changing from one form into another in a never-ending series of processes.

Vocabulary # 13 - Minerals of Earth's Crust

Mineral: a solid material of Earth's crust with a definite composition.

  

Luster: the way light bounces off a mineral's surface.

     
Streak: the color of the powder left when a mineral is rubbed against a hard, rough surface.

  

Hardness: how well a mineral resists scratching.





Cleavage: the tendency of a mineral to break along flat surfaces.



Ore: a mineral containing a useful substance.

 

Gem: a mineral valued for being rare and beautiful.

    
 
Nonrenewable resource: a resource that cannot be replaced within a short period of time or at all.