PSSA prep - science 8th Gr.

23 terms by kvazquez

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Terms and vocabulary for the 8th grade Science PSSA test

hypothesis

testable idea

variable

changable factor in an experiment

independant variable

the thing that will be changed in each experiment

dependant variable

the thing that is affected by the change

constant

the thing that is kept the same in each experiment

sample size

the number of observations make when gathering data

control group

the group where there are no variables changed

mean

average of all the numbers in a data set

median

"in the middle" of the data set

mode

"most often" in a data set

phases

the different stages that matter can occur in (solid, liquid, gas, plasma)

physical change

the chemical properties are the same- physical are different

chemical change

the chemical make-up changes

vaporization

liquid to gas change

condensation

gas to liquid change

sublimation

solid changes to gas (it doesn't go to liquid first)

deposition

gas changes to solid (no liquid phase)

melting point

0 Celcius

volume

amount of space an object takes up

mass

the amount of matter that makes up a substance

weight

mass of an object + gravity

solute

the substance that is dissolved

solvent

the substance that does the dissolving

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