science - concept 2

physical properties

observed directly or measured without changing the chemical of the substance

Physical

mass, volume, shape, size, color, luster, hardness

Melting point

temp when a solid becomes a liquid

Boiling point

temp when a liquid becomes a gas

Viscosity

fluids resistance to flow

(how thick a liquid is)

• only applies to a liquid

• a physical property

• can change temp

Solubility

how well a solute dissolves in a solvent ( how well the dry dissolves into the liquid)

solute

what is being dissolved lemonade powder

solvent

what is doing the dissolving (water)

solution

the rest ( aftermath) the lemonade

density

compactness or consistancy of a material D= m/v

chemical properties

observed or measured by changing the chemical identity of the substance

chemical properties

toxicity, flammability, combustibility, radioactivity, ect.

combustibility

how easily a substance will set on fire.

reactivity

how easily a substance reacts, usually with an acid or base

oxidation

how easily a substance reacts with oxygen

laws of conservation

matter is not created nor destroyed during a chemical change it only changes form.

evidence of a chemical change

relase of light

temp change

odor change

sudden color change

gas is given off

sudden apperance of a solid