sábado, 9 de abril de 2011

Vocabulary 3: Chemical Changes

1 Compound: A chemical combination of two or more elements.  



2 Chemical Bond: a link that atoms or electrically charged particles can form with each other. 



3 Chemical Formula: a way of using letters and numbers to show how much of each element is in a substance.  



 4 Ion: an electrically charged particle with unequal numbers of protons and electrons.  



5 Molecule: a group of bonded atoms that acts like a single.  



6 Chemical Property: a way of describing how a substance changes chemically with other substances.

  
7 Exothermic: a reaction that gives off heat.



8 Endothermic: a reaction that absorbs heat.

sábado, 19 de marzo de 2011

Vocabulary # 2

1 element: a substance that connot be broken down any further into anything simpler



2 atom: the smallest psrticle of an element that has the same chemical propertoies as the element



3 nucleus: an atom's  dense center, ahere most of its mass is



4 electron: a negatively charged particle that moves around an atom's nucleus



5 proton: a positively charged particle inside an atom's nucleus



6 neutron: a particle with no charge inside an atom's nucleus



7 atomic number: the number of  protons in an atom



8 metal: any of a group of elements that conduct heat and electricity, is shiny and bendable

Vocabulary # 1

1 Matter: any solid, liquid,or gas.



2 Mass: amount of matter in an object.



3 Volume: the amount of space an object takes up.



4 Density: the amount of mass in a certain volume of material.



5 Physical Property: A property that can be observed without changing the identify of a substance. 



6 Physical Change: a change in size,shape,or state without forming a new substance



7 Solution: a mixture of one substance dissolved in another so that the properties are the same throughout



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

lunes, 18 de octubre de 2010


Summary 1, Energy Resources:

What means biomass: Bio means live and Mass amount of matter.

Examples of Alternative Energy Resources:


  • Wind Energy  
  • Water Energy  
  • Solar Energy  
  • Geothermal Energy  



Do we can make methane? Yes  we can make methane with many differents food, 1 food to make methane is the corn. In Brasil they produce the methane with the corn. 


Summary 2, Living Things and their Environment: 


Biotic is a living thing.Abiotic is a nonliving thing. 

Ecosystem                          

                           
                        Biotic                                                                                             Abiotic 
Animals, Fungi, Protist, Plants, Bacteria                                          Soil, Minerals, Light, Area, Rocks, Water             


Summary 3, Food Chain and Food Web


                                                                 Food Web








martes, 28 de septiembre de 2010

Vocabulary#9

Emulsion: a liquid spreadtrough another liquid



Aerosol: liquid drops or solid particles spread trough a gas


Gel: a solid spread trough a lliquid.

Foam: a gas spread troug a liquid or solid.

Vocabulary#9

Emulsion: a liquid spreadtrough another liquid



Aerosol: liquid drops or solid particles spread trough a gas


Gel: a solid spread trough a lliquid.

Foam: a gas spread troug a liquid or solid.

domingo, 26 de septiembre de 2010

Plasma

Plasma was first identified in a Crookes tubePlasma, therefore, has properties quite unlike those of solidsliquids, or gases and is considered to be a distinct state of matterPlasmas are by far the most common phase of matter in the universe, both by mass and by volume.