martes, 28 de septiembre de 2010

earth changing crust

Fault: a crack in the crust, whose sides show evidence of motion.





2.Geologist: a scientist who studies Earth's surface.






3.Magma: hot, molten rock deep below Earth's surface.






4.Lava: magma that reaches Earth's surface.









5.Weathering: the breaking down of rock into smaller pieces.



6.Erosion: the picking up and carrying away of pieces of rock.



7.Deposition: the dropping off of bits of eroded rock.



8.Meteorite: a chunk of rock from space that strikes a surface ( such as Earth or the Moon ).




earth and its neighboors

Solar system: the sun and the objects that are traveling around it.




2.Planet: any of the eight large bodies that travel around the Sun and shine by reflecting it light.



3.Gravity: a force of attraction, or pull, between any object and any other object around it.



4.Inertia: the tendency of a moving object to keep moving in a straight line.



5.Lithosphere:the hard, outer layer of Earth, about 100 kilometers thick.



6.Crust: the rocky surface that makes up the top of the lithosphere.



7.Resource: any material that helps support life on Earth.



8.Hydrosphere: Earth's water.




matter and energy

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.Convenction: movement 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 electricity current.



7.Dry cell batery: a battery that uses "dry chemicals" to produce an electric current.
 


chemical changes

Phisical 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 mixture and solucion

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

2.Solution: a mixture in which 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 dropsor solid particles spread through a gas.



7.Gel: a solid spread through a liquid.



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


voabulary solids liquids and gases

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

melting point: the temperature at which a solid changes state into a liquid.



3.Boilling point: the temperature at which a liquid changes state into a gas.



4.Freezing point: the temperature at which a liquid changes state into a solid.


vocabulary 6

Element: a basic building block of matter; a pure substance that cannot be broken down into anything simpler.


2.Compound: a chemical combination of two or more elements into a single substance.



3.Atom: the smallest unit of an element that still has the properties of the element.



4.Proton: a particle with a positive charge in the nucleus of an atom.



5.Neutron: an uncharged particle in the nucleus of an atom.



6.Electron: a particle with a negative charge moving around the nucleus of an atom.



7. Nucleus: the dense center part of an atom.



8. Molecule: a group of more than one atom joined together that acts like a single particle.


vocabulary 5

mass:the amount of matter in an object.










volume:the amount of space an objects takes up.

weight:a measure of the force of gravity betwwen Earth and  an object. 



density:a measure of how tighly packed matter is ;the amount of mass contained in a given volume.

bouyancy:the upward push on an object by the liquid the object is placed in.



conduct: allow heat or electricity to flow through readily.
insulate:not allow heat or electricity to flow through readily