Changes in matter

ChangesinmatterPhysical and Chemical PropertiesPhysical and Chemical ChangesObservable Features of Chemical Reactions

Physical propertiesused to identify substances

used to classify substances

used to determine effective building materials

Examples of physical propertiesElasticityHardnessDurabilityTextureShapeBoiling pointFreezing pointMelting point

Chemical Propertiesused to identify substances

used to classify substances

used to determine effective building materials

used to determine materials suitable in different environments

Examples of chemical propertiesFlammableNon-flammableReacts with waterDoesnt react with waterCorrosivenessToxicityCombustibility

Physical changePhysical changes.are concerned with states of matter

are concerned with energy

form no new substances

include changes in states of matter

Same beginning & ending materials

Examples ofphysical changesCrushing a can

Melting an ice cube

Breaking a bottle

Boiling water into steam

Forming clay into a sculpture

Physical

Chemical changeChemical changes.

happen on a molecular level

make new substances

have indicators that change has taken place

Different beginning & ending materials

Examples ofchemical changesBurning logs in a fire

Cooking an egg

Rusting an iron pan

Mixing soda with vinegar

Exploding fireworks

ChemicalEvidence ofchemical changesChange in color

Change in odor

Energy given off (light, heat, sound)

Gas given off

Precipitate forms

Reaction typesinvolving heatExothermic reactions (heat is given off)

Endothermic reactions (heat is taken in)

Boom!Fizz!Chemical change ratesRates are affected by.Heating

Cooling

Stirring

Crushing

Concentration

Conservation of matter Matter cant be created or destroyed

Mass cant be created or destroyed

Changes in matterMatter has physical and chemical properties.

Matter can change physically & chemically.

Energy is involved in the changes.

Chemical reactions have observable features.

Matter is conserved in a chemical reaction.