Vocabulary #6 Sources of Energy

1-solar cell: a device that generates an electric current from sunlight.

2-biomass conversion: getting energy from plant and animal by changing them into high-quality fuels.

3-nuclear fission: the splinting of a nucleus with large mass into two nuclei with smaller masses.

4-chain reaction: a reaction that is kept going by products of the reaction.

5-nuclear fusion: the merging of nuclei with smaller masses into a nucleus with a larger mass.

6-hydroelectricity:the use of flowing water to generate electricity.

7-thermal pollution: the excess heating of the environment.

Vocabulary #5 Temperature, Heat and Matter

1-thermal expansion: the expansion of matter when its temperature is raised.

2-pressure: the force on each unit of area of a surface.

3-melting: the change of a solid into a liquid,

4-vaporization: the change of a liquid to a gas as molecules break free from echa other.

5-condensation: the change of a gas into a liquid as molecules attract each other.

6-freezing: the change of a liquid into a solid.

7-boiling: the formation of bubbles of vapor that escape from a liquid that is being heated.

8-evaporation: the vaporization of molecules from the surface of a liquid.

Vocabulary #4 Temperature and Heat

1-kinetic energy: the energy of a moving object.

2-potential energy: energy stored in an object or material.

3-temperature: the average kinetic energy of the molecules in a material.

4-heat: energy that flows between objects that have different temperatures.

5-radiation: the transfer of energy by electromagnetic waves.

6-conduction: the transfer of energy by direct contact of molecules.

7-convection: the transfer of energy by the flow of a liquid or gas.

8-insulation: prevents heat from flowing in or out of a material.

Vocabulary #3 Chemical Changes

1-compound: a chemical combination or 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.

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 particle.

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.





Vocabulary #2 Elements and Atoms

1- element: a substance that cannot be broken down any further into anything simpler.

2- atom: the smallest particle of an element that has the same chemical properties as the element.

3- nucleus: an atom´s dense center where 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 Physical Properties

1- matter: any solid, liquid or gas that makes up the world that around us.

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 identity 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 troughout.

8- chemical change: a change in matter that produces a new substance with different properties from the orginal.

6° SIXTH GRADE

We get back to school again long ago March 1first. The vacations for me were great and a little short but very great. But whatever,  for all are seeing this blog I will  use the same blog of the last year to use it other time this year. I will use the blog as the last year to write summaries , vocabularies and others about the topics we have in science class. ENJOY IT!

                                                                                         

                                                                             

                                                                                 Back to school !