Classifying Matter Physical and Chemical Changes Elements and

Classifying Matter Physical and Chemical Changes Elements and Compounds Pure Substances and Mixtures

Physical Change A change of matter from one form to another without a change in chemical properties Chemical Change A change that occurs when one or more substances change into entirely new substances with different properties

Element A substance that cannot be broken down or separated into simpler substances by chemical means. Compound A substance made up of atoms of two or more different elements joined by chemical bonds.

Pure Substance A sample of matter, either a single element or a single compound, that has definite chemical and physical properties. Mixture A combination of 2 or more substances that are not chemically combined.

FOR THE NEXT SLIDES, DISCUSS WHETHER THEY ARE EXAMPLES OF A PHYSICAL CHANGE OR A CHEMICAL CHANGE

Boiling water for tea

Digesting food

Soda goes “flat”

Shooting a rubber band

Grilling a hamburger

Adding sugar to your tea

Adding lemon to your tea

Mowing the grass

Smell of perfume

Candle wax melts

Breaking glass

Making cement

Lighting a match

LED display

Firefly glows

Snow disappears without melting

Burning Germans

Bleaching your hair

Turning on lightbulb

Milk goes sour

Shooting off fireworks

FOR THE NEXT SET OF SLIDES, DISCUSS WHETHER THEY ARE ELEMENTS, COMPOUNDS, PURE SUBSTANCES OR MIXTURES OR COMBINATION OF THESE

Salt

Block of iron

Glass of cola

Mercury in a thermometer

Ice

Vinegar and Oil

Copper wire

Earth’s dusty atmosphere

Earth’s clear atmosphere

Rust

Brass

Aluminum foil

Homogenized milk

Sugar

Sugar water

Sandy water

Neon gas in a neon sign

Blood