# Shared Flashcard Set

## Details

Density, % error
Earth Science
18
Geography
09/24/2009

Term
 Density
Definition
 The amount of mass in an object per a given volume
Term
 Density Equation
Definition
 D= M/V (unit = g/ml or g/cmÂ³)
Term
 How do you change the density of an object?
Definition
 By changing temperature or pressureTemp(up) -> Volume(up) -> Mass stays the same -> Density(down)Temp(d) -> Volume (d) -> Mass stays the same -> Density (up)Pressure(Up) ->Volume (d) -> Mass stays the same -> Density(up)Pressure(d) ->Volume (up) -> Mass stays the same -> Density(d)
Term
 % error
Definition
 Difference from accepted value/accepted value*100Unit %or Yours - Theirs/Theirs *100
Term
 3 phases of matter?
Definition
 Gas LiquidSolid Increasing Density------------------->Gas Liquid Solid
Term
 Water?
Definition
 Increasing Density-------------------->Gas Solid LiquidH20 H20 H20 (ice)
Term
 Observation
Definition
 Interaction between your senses and the environment
Term
 Inference
Definition
 using an observation to draw a conclusion
Term
 Measurement
Definition
 A direct comparison to a known standard. (A number and unit must be given)
Term
 Classification
Definition
 Grouping based on similar properties
Term
 Nature of change?what is change?
Definition
 Change can be described as the occurrence of an event.If change has many variables it will be more difficult to predict change
Term
 Event?
Definition
 Occurs when the properties of a system are altered
Term
 What happen if the nature of change is known...?
Definition
 then the rate and direction of change can be predicted.
Term
 predictions will be more accurate...
Definition
 if data is collected over a long period of time
Term
 Relationship between Energy & Change
Definition
 - All change involves the transfer of Energy- If energy is lost in one part of a system then it must be gained at another part of the system and change will occur- The exchange of energy occurs at an interface
Term
 What is an Interface?
Definition
 Interface is the point where the energy is exchanged
Term
 Rate of change?
Definition
 Change in field value/change in time or change Y/ change X
Term
 Dynamic Equilibrium
Definition
 energy is into a system equals energy out of a system
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