Visual Vocab

Chemistry

Chemical vs Physical Properties

Chemical properties:•Characteristics which are exhibited as ONE substance is chemically TRANSFORMED into ANOTHER

○ Examples: reactivity and flammability

Physical properties:•Characteristics that can be OBSERVED WITHOUT changing the identity of the subject.

Chemical or Physical??

SMELL

Chemical or Physical??

Chemical or Physical??

Chemical or Physical??

Physical vs Chemical Changes

Chemical Change

CHANGE the COMPOSITION (make up) and IDENTITY of the matter involved.

Some common signs of chemical changes includes:○ odor (smell)○ production of heat○ fizzing/ bubbling○ CANNOT be easily reversed

Physical Change

Physical changes do NOT change the composition of a substance.

Many physical changes can be EASILY reversed.

Examples include: * melting ice *boiling water *breaking glass

Let’s Practice!

On your whiteboard write whether each picture represents a physical or chemical change

Chemical or Physical??

Chemical or Physical??

Chemical or Physical??

Chemical or Physical??

Chemical or Physical??

Chemical or Physical??

Chemical or Physical??

Chemical or Physical??

Matter•is anything that has MASS and takes up SPACE

Mass● a measure of the amount of matter in an object.

● ALWAYS constant. Does NOT change based on location.

● TOOL USED TO MEASURE: a Triple Beam Balance (TBB)

● UNITS: Grams (g) or Kilograms (kg)○ 1 kg= 1000 grams

Weight● a measure of the gravitational force exerted on an object.

● Its value can CHANGES with the location of the object in the universe.

● TOOL USED TO MEASURE: a spring scale

● UNITS: Newton (N)

VOLUMEmeasures the amount of SPACE that object occupies.

REGULARLY shaped solid object:

Volume = length × width × height

VOLUME of REGULARLY shaped solid objects

TOOL USED TO MEASURE: RULER

UNITS: Cubic centimeters (cm3)

VOLUMEIRREGULARLY shaped object :Measure the volume of water that the object displaces.

VOLUME of IRREGULARLY shaped solid objects

TOOL USED TO MEASURE: GRADUATED CYLINDER

UNITS: Liters (L) and milliliters (mL)

○ 1 mL = 1 cm3

DENSITY● is the amount of mass per unit of volume.● Density= mass divided by volume● Density of water is 1 g/cm3

○ TOOL USED TO MEASURE: ruler, graduated cylinder, triple beam balance

○ UNITS: grams per cubic centimeters (g/cm3)

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ResourcesChapter menu

Ductility The ability for a metal to be pulled into a wire.

Example: Copper is a common material used to make wire

MalleabilityThe ability of a metal to be rolled or pounded into thin sheets.

Example: Gold, Aluminum

SolubilityThe ability of a substance to dissolve in another substance

Example: salt in water dissolves to become salt water.

Thermal conductivityIs the rate at which a substance transfers heat.

Example: styrofoam is an insulator which means its a poor conductor. Metals are good conductors.