Home > Flashcards > Science > Mid-Term exam vocabulary

Details Title: Mid-Term exam vocabulary Description: 9th grade mid term Total Flash Cards: 41 Created: 10/09/2007 20:30:07	To study from this set of flash cards, or to create your own your own study flash cards, register HERE. If you are already a registered user, CLICK HERE.
Cards Term control Definition the standard to which test results can be compared Term data Definition analyzed information from and experiment or investgation Term experiment Definition common way to test a hypothesis Term hypothesis Definition educated guess based on knowledge and observation Term conclusion Definition a statement basedon your data and oberservations that proves your hypothesis correct or incorrect Term matter Definition anything that takes up space Term kinetic theory of matter Definition explantation of how particles of matter behave Term thermal expansion Definition an increase in the size of a substance when the temp. is increased Term Archoimedes' principle Definition the buoyant force of an object is equal to the weight of the fluid displaced by the object; if an object has a higher densty than a substance it will sink Term Bernoulli's priniple Definition states that as the speed of a moving fluid (liquid or gas) increases, the pressure within the fluid decreases. Term Charles law Definition the volume of a gas increaces with increasing temperature, as long as pressure doesn't change Term Boyles law Definition if you decrease the volume of a container of gas and hold the temp. constant the pressure of the gas will increase Term pure substance Definition element or compund Term element Definition all atoms alike in a substance Term compund Definition a substance in which the atoms of 2 or more elements are combined in a fixed proportion Term heterogenous mixture Definition materials can be seen easily Term homogenous mixture Definition has 2 or more gas, liquid,or solid substances blended good Term solution Definition homogenou mixture that contain very samll particles, that never settle to the bottom of a container Term colliod Definition type of mixture that never settles Term chemical change Definition a change of one substance to another Term physical change Definition a change in size,shape,or state of matter Term Law of conservation of mass Definition no matter is created or destroyed:when a log goes to ashes Term proton Definition part of the atom that has a charge of +1 Term neutron Definition part of the atom that has no electric charge Term elecron Definition part of the atom that has a charge of -1 Term chemical formula Definition tells what elements a compund contains and the exact numbers of the atom of each element in a unit of that compund Term oxidation number Definition how many electrons an atom has gained lost or shared to become stable Term metalliod Definition they form ionic nd covalent bonds with other elements: B Si Ge As Sb Te Po At Term malleable Definition hammered or rolled into sheets: metals would be this Term organic compund Definition most compunds containing the element carbon Term solute Definition substance being dissolved Term solvent Definition substances dissolving a solute Term reactants Definition substance that reacts Term products Definition substance being produced Term chemical reacions Definition a change in 1 or more substance are converted into new substances Term coefficent Definition # that represents the # of units of each part taking place in the substance Term synthesis reaction Definition 2 or more subsances combine to form another substance A + B > AB Term decomposition reaction Definition one or more substance breaks down or decomposes into 2 or more substances Term single deplacement reaction Definition when one element replaces another element in a compund A+BC > AC+B Term double deplacement Definition the positive ions of 1 compund replaces the positive ion of otherto form 2 new compunds AB+CD > AD+CB Term indicators Definition an organic compund that changes color in acid or base