Vocabulary 4

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



2. Potencial 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 electromegnetic waves.



6.Conduction: the transfer of energy by direct contact of moleculas.



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



Insulation:prevents heat from flowing in or out of a material.

Vocabulary 3

Compound: A chemical combination of  tow or more elements.


Chemical bond: A link that atoms or electrically charged particles can form with each other.


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


Ion: An electrically charged particle with unequal numbers of protons and electrons:


Molecule: A group of bonded atoms that acts liki a single particle.


Chemical property: A way of  describing how a substance changes chemically with otherb subtance.
 

Exothermic: A reaction thet gives off  heat.


Endothermic: A reaction that absorbs heat.

vocabulary 2

Element: A substance that cannot be broken down any further into anything simpler.


Atom: the smallest particle of an element that has the same chemical properties as the element.
 

Nucleus: an atom's dense center, where most of its mass is.


Electron: a negatively charged particle that moves around an atom's nucleus.

Proton: a positively charged perticle inside an atom´s nucleus.

Neutron: a perticle with no charge inside an atom´s nucleus.

Atomic number: the number of protons is an atom.

Metal: any of a group pf elements that conduct heat and electricity, is shiny and bandale.