martes, 28 de septiembre de 2010

Vocabulary #16

1.Desallination: Getting fresh water from sea water.





2.Water cycle: The continuous movement of water between earth´s surface and the air,changing from liquid to gs to liquid.





3.Groundwater: Water that seeps into the ground into spaces between bits of rock and soil.




4.Water tabla: The top of the water-filled spaces in the ground.





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






6. Sping: A place were ground water seeps out of the ground.






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




8.Reservoir: A storage area for fresh water supplies.



Vocabulary #15

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





2.Ozone layer: A layer of ozone gas in the atmosphere that screens out much of the sun`s UV rays.






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




4.Smog: A mixture of smoke and fog.






5.Acid rain: Moisture that falls to earth after being mixed wirh wastes from burned fossil fuel.




Vocabulary #14

1.Kinetic energy: The energy of a moving object.


2.Potential energy: Energy stored in an object or material.



3. Conduction: Movement of energy from a hot object that comes into contact with a cooler object,the material remains in place.


4.Convection: M ovement of energy by the flow of matter from place to place.




5.Radiation: Movement of energy in the form of waves that can travel through empty space.




6. Wet cell battery: A battery containing liquid solution that produces the electric current.





7.Dry cell battery: A battery that uses "dry chemical"to produce an electric current.



Vocabulary #13

1.Physical change: A change in size shape or state.without forming a new substance.


2.Chemical change: A change in matter that produces a new substance with different properties from the original.




3.Chemical reaction: A chemical change of original substances into one or more new substances.



4.Reactant: One of the original substances before a chemical reaction takes place.


5.Product: One of the new substances produced when a chemical reaction takes place.



Vocabulary #12

1.Mixture: Two or more parts blended together yet keeping their own properties and not turning into a new substance.

2.Solution: A mixture in wich substances are completely blended so that the properties are the same throughout and the substances stay blended.




 3. Suspension: A mixture of substances that separate upon standing.





4.Colloid: Particles (or droplets) large enough to block out light spread throughout another substance.

5.Emulsion:A liquid spread through another liquid.

6.Aerosol:Liquid drops or solid spread through a gas.

7.Gel: A solid spread through a liquid.



8.Foam:A gas  spread through a liquid or solid.


Vocabulary #11

1.State of matter: Any of the forms matter can exist in





2.Melting point: The temperature at wich a solid changes state into a liquid.



 3.Boilig point: The temperature at wich liquid changes state into a gas.





 4.Freezing point: The temperature at wich a liquid changes state into a solid.





miércoles, 22 de septiembre de 2010

Science project #2

Definition: In this project we will learn about the land pollution in my neighborhood.




Description of the problem: In my neighborhood we have land pollution because the kids and also adults throw the trash on the floor because they are lazy to throw the trash on the waste basket,so i will try to help on that problem.





 
 I can help with this problem by puting more waste basket with signs sayin "Don´t be lazy and throw the trash on the waste basket !".






lunes, 20 de septiembre de 2010

Vocabulary #10

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



2.Igneous rock: A rock formed when melted rock material cooled and hardness




3.Sedimentary rock: A rock made of bitts of matter joined together.








4.Fossil. A ny remain or imprinted of living things of the past.






5.Metamorphic rock: A rock formed under heat and pressure form another kind of rock.



6.Humus: Decayed plant or animal material and soil.




7.Polution: Adding any hamful substances to earth land,water or air.






8.Rock cycle: R ock"s changing from one form into another in a never ending series of process.





Vocabulary #9

1.Mineral: A solid material of earth"s crust with a definite composition.



2.Luster: The way light bounces off a mineral"s surface.




3.streak:  The color of the powder left when a mineral is rubbed against a hard,roygh surface





4.Hardness: How well a mineral resists scratching.



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








6.Ore: A mineral containing a useful substance.





7. Gem: A mineral containing a useful substance.



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