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.
Science Class
miércoles, 27 de abril de 2011
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.
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.
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.
lunes, 25 de abril de 2011
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.
6-chemical property: a way of describing how a substance changes chemically with other substances.
7-exothermic: a reaction that gives off heat.
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.
miércoles, 20 de abril de 2011
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.
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.
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.
miércoles, 6 de abril de 2011
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 !
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