Science Term 2

aqueous solution

solution with water as the solvent

atom

smallest part of an element

compound

two or more elements that are chemically bonded

concentrated

large amount of solute in the solution

controlled variable

the variable that is kept constant for the experiment to be valid

dependent variable

the variable depended on for the answer (the outcome)

diffuse

the spreading out of particles

dilute

little amount of solute in the solvent

disslove

break up into tiny particles too small for the human eye to see

distillation

the process using evaporation followed by condensation to recover the solvent from a mixture

filtrate

the liquid that passes through the filter paper

evaporation

the process of heating a substance to change the state from liquid to gas

gaseous

in the form of gas

heterogenous

can see particles in the mixture

homogenous

cannot see particles in the mixture

immiscible

cannot be mixed

impure substance

more than one type of particle

pure substance

one type of particle

independent variable

factor changed in an investigation (the cause)

insoluble

cannot be dissolved

mixture

combination of two or more pure substance

molecule

two or more atoms joined together to form a small, separate particle

particle theory

theory that states that all matter consists of tiny particles that are constantly moving

prediction

an educated guess or statement regarding the relationship between two variables

residue

the solid left in the filter paper after filtration

saturated solution

a solution that contains as much solute as possible

solubility

measure of the amount of solute that can be dissolved in the solvent

soluble

ability to dissolve in the particular solvent

solute

substance being dissolved

solution

mixture where one substance is dissolved in another

solvent

a substance that does the dissolving

substance

material with physical properties (solid, liquid, gas)

supersaturated

more solute is dissolved than it normally would at room temperature

suspension

mixture when two or more substances won’t mix

toxin

poisonous substance

vapour

matter that has been produced through the evaporation of a liquid