Science Exam Review (Unit 1: Introduction to Matter)

matter

anything that has mass and occupies space

substance

pure form of matter with specific composition

element

substance made of only one kind of atom

compound

substance made of two or more elements chemically combined

mixture

physical combination of substances

homogeneous mixture

mixture that looks the same throughout

heterogeneous mixture

mixture where parts are visible

physical property

can be observed without changing matter

chemical property

describes matter’s ability to change

density

mass divided by volume

mass

amount of matter in an object

weight

gravitational pull on an object

volume

amount of space matter takes up

filtration

separation method based on particle size

distillation

separation method using boiling points

evaporation

separating dissolved solids from liquids

magnetic attraction

separating mixtures using magnets

thermal energy

energy from particle movement

melting point

temperature at which solid melts

boiling point

temperature at which liquid boils

law of conservation of mass

mass is neither created nor destroyed

physical change

change affecting form not identity

chemical change

change creating new substances

solution

homogeneous mixture of solute and solvent

solute

substance being dissolved

solvent

substance doing the dissolving

solubility

amount of solute that can dissolve

saturated solution

solution with maximum solute dissolved

unsaturated solution

solution that can dissolve more solute

supersaturated solution

solution holding more solute than usual