Chemical vs. Physical Change 6 th Grade. There are two types of properties:...
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Transcript of Chemical vs. Physical Change 6 th Grade. There are two types of properties:...
Chemical vs. Physical Change
6th Grade
There are two types of properties:
Physical Physical PropertiesProperties
Chemical Chemical PropertiesProperties
Physical Properties can be observed without changingwithout changing the matter:
• shape• state (solid, liquid, or gas)• density• color• smell• appearance
Physical PropertiesPhysical Properties of this ball:
• round shape
• solid• red color
Chemical Properties can only be tested by changingby changing the matter:
• flammability (will it burn?)• oxidation (will it rust?)• volatility (will it explode?)• reactivity (will it react to chemicals?)
Chemical PropertiesChemical Propertiesof this flask:
• not flammablenot flammable• won’t rustwon’t rust
• can explode if can explode if over heatedover heated
• won’t react to acidwon’t react to acid
What are some Physical PropertiesPhysical Properties for this hamburger?
• solid• round bun• many colors• smells tasty
What are some Chemical PropertiesChemical Properties for this hamburger?
• can burn (except lettuce
and pickles)• won’t rust• won’t explode• will react to stomach acid by dissolving
What are some Physical PropertiesPhysical Properties for propane gas?
• gas• no fixed shape• invisible•Smells like rotten eggs• very light density
What are some Chemical PropertiesChemical Properties for propane gas?
• will burn easily• gas won’t rust
(but tank will)• can explode!• can react with
other chemicals
Is it a Physical PropertyPhysical Property or a Chemical PropertyChemical Property?
Strawberriesare red with agreen top.
Physical PropertyPhysical Property! It doesn’t change the strawberry to check its color.
Apples will oxidize andturn brown if left out in air.
Chemical PropertyChemical Property! It will change the apple to wait for it to brown.
Is it a Physical PropertyPhysical Property or a Chemical PropertyChemical Property?
Copper wireconducts electricity
Physical PropertyPhysical Property! It doesn’t change the copper wire to check conductivity.
Is it a Physical PropertyPhysical Property or a Chemical PropertyChemical Property?
Alka Seltzerfizzes in water
Chemical PropertyChemical Property! It will change the Alka Seltzer to dissolve it in water.
Is it a Physical PropertyPhysical Property or a Chemical PropertyChemical Property?
The density of goldis 19.3 g/mL
Physical PropertyPhysical Property! It won’t change the gold to calculate its density.
Is it a Physical PropertyPhysical Property or a Chemical PropertyChemical Property?
Physical Change
• A change that alters the appearance of a material but doesn’t make that material into something new
• Examples:– Tearing Paper– Chopping Wood– Molding Clay– Cutting Hair– Mixing Salt and Pepper
• DOES NOT form a new substance
Chemical Change
• A change in matter that produces a new substance
• Examples:– Fireworks– Food rotting– Lighting a match
5 clues to a Chemical change
1. Color Change2. Gas given off (bubbles)3. Temperature Change (hot or cold)4. Precipitate formed – two liquids
form a solid5. New substance formed
Physical or Chemical Change?
Physical Change
Physical or chemical change?
• Hammering wood together
Physical Change
Physical or chemical Change?
• Rusty Bike
Chemical Change
Physical or Chemical change?
• Melting Butter
Physical Change
Physical or chemical change?
• Rotting food
Chemical Change
Physical or Chemical Change?
• Mixing Kool-Aid powder in water
Physical Change
Physical or chemical change?
• Mowing the grass
Physical Change
Physical or chemical change?
• Bleaching your hair
Chemical Change
Physical or chemical change?
• Fireworks exploding
Chemical Change
Physical or chemical change?
• Squeezing oranges to make orange juice
Physical Change
Physical or chemical change?
• Frying an egg
Chemical Change
Physical or chemical change?
• Burning leaves
Chemical Change
Physical or chemical change?
• Cream being whipped
Physical Change
Physical or chemical change?
• Burnt toast
Chemical Change
Physical or chemical change?
• Melting Ice cream
Physical Change