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Science Exam Review
| Term | Definition |
|---|---|
| Mass | The amount of matter in an object |
| Weight | How strongly gravity pulls on an object |
| Volume | Measures how much space matter takes up |
| Matter | Anything that has mass or volume |
| Surface Tension | A property liquids have that acts as a skin |
| States of Matter | One of the three forms matter can take on |
| Density | The amount of mass for each centimeter of a substance |
| Buoyancy | The resistance to sinking |
| Element | A material that can not be broken down into anything simpler by chemical reactions |
| Metal | elements that share common properties |
| Atom | The smallest unit of an element that retertains theproperties of that element |
| Nucleus | the center of an atom |
| Proton | A partical with one unit of positive energy |
| Neutron | A partical with no electric charge |
| Electron | Smaller particals with one unit of negitive electric charge |
| Chemically Reactive | When an atom needs more electrons in its shell to fill them |
| Molecule | Particals with more than one atom joined together |
| Atomic Mass | Some of all the protons and neutrons in an atom |
| Noble Gases | Elements that don't mix with other elements |
| Malleability | The ability to be bent flattened or hammered without breaking |
| Ductillity | The ability to be pulled into thin wires without breaking |
| Nonmetals | Exellent insulators of heat and electricity |
| Insulators | Matrials that are poor conducters of heat and elecricity |
| Corrosion | When metals combined with nonmetas from the environment |
| Semiconductor | material that conducts electricity better than a nonmetal but not as well as a metal |
| Physical change | alternates a form without changing what kind of matter there is |
| Sublimation | a change of stage directly from a solid to a gas |
| Melting point | the tempature when a substance melts |
| Boiling point | the tempature when a substance boils |
| Freezing point | the tempature when a substance freezes |
| Thermal expansion | the increase in an object's volume due to a change in heat |
| Thermal contraction | the decrease in an object's volume due to a change in heat |
| Mixture | a physical cobination of substances |
| Colloid | a mixture simular to a suspension exept it's parts do not settle |
| Solution | a mixture with parts that blend in so it looks the same everywhere |
| Solute | the smaller amount that dissolves in a solution |
| Heterogeneous | mixtures where you can plainly see all the parts |
| Suspension | heterogeneous mixtures that look smooth or creamy plainly, but under a microscope you can see it clearly |
| Chomotography | when liquids travel up the special paper and carries small particals with it |
| Solvent | the larger amount that dissolves the other substance |
| Alloy | a solution of a metal and another solid |
| Solubility | the maximum amount of a solute that can dissolve in a solvent |
| Distillation | the process of separtating 2 liquids by using evaporation and condension |
Created by:
kgreene10
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