{ Physical vs Chemical Changes Is there a new substance? Matter can change. The changes are categorized as either physical change or a chemical change.

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Presentation transcript:

{ Physical vs Chemical Changes Is there a new substance? Matter can change. The changes are categorized as either physical change or a chemical change.

Physical Changes Examples: 1.Melting 2.Boiling 3.Breaking 4.Cutting 5.Dissolving A physical change is a change where the substance may change its appearance but the particles of the substance are still the same. Ex: Ice<>Water<>Steam

Physical Changes Examples: 1.Melting 2.Boiling 3.Breaking 4.Cutting 5.Dissolving  Appearance changes but substance does not

Physical Changes Examples: 1.Melting 2.Boiling 3.Breaking 4.Cutting 5.Dissolving  Appearance changes but substance does not

Physical Changes Examples: 1.Melting 2.Boiling 3.Breaking 4.Cutting 5.Dissolving  Appearance changes but substance does not

Physical Changes Examples: 1.Melting 2.Boiling 3.Breaking 4.Cutting 5.Dissolving  Appearance changes but substance does not

Physical Changes Examples: 1.Melting 2.Boiling 3.Breaking 4.Cutting 5.Dissolving  Appearance changes but substance does not

Chemical Changes Examples: 1.Produces bubbles 2.Turns cloudy 3.Temperature change 4.Colour change 5.Change in smell or taste  Substance change! In a chemical change, the original substances react and form one or more DIFFERENT substances that have different properties. Ex: Iron and Oxygen react to make rust (iron oxide)

Chemical Changes Examples: 1.Produces bubbles 2.Turns cloudy 3.Temperature change 4.Colour change 5.Change in smell or taste  Substance change!

Chemical Changes Examples: 1.Produces bubbles 2.Turns cloudy (or a precipitate is formed) 3.Temperature change 4.Colour change 5.Change in smell or taste  Substance change!

Chemical Changes Examples: 1.Produces bubbles 2.Turns cloudy 3.Energy change (temperature or light) 4. Colour change 5. Change in smell or taste  Substance change!

Chemical Changes Examples: 1.Produces bubbles 2.Turns cloudy 3.Temperature change 4.Colour change 5.Change in smell or taste  Substance change!

Chemical Changes Examples: 1.Produces bubbles 2.Turns cloudy 3.Temperature change 4.Colour change 5.Change in smell or taste  Substance change!

Chemical Reactions  Equations Reactants Products

Melting butter for popcorn

A bicycle rusting

Frying an egg

Dyeing my hair blond

Making salt water to gargle with

Cream being whipped to top a sundae

Melting ice cream

Boiling water for tea

Burning toast

Shredding old documents

Acid rain wears away rock

Dropping and breaking a test tube

Firefly glowing

Dog tearing up your homework

Dog eating (digesting) your homework