Chemical and Physical Properties and Changes Physical Properties

  • Slides: 22
Download presentation
Chemical and Physical Properties and Changes

Chemical and Physical Properties and Changes

Physical Properties and Changes Physical Properties are used to observe or describe matter. How

Physical Properties and Changes Physical Properties are used to observe or describe matter. How do you observe or describe someone? • Height Let’s describe • Hair. Schrute Color Dwight • Eye Color • Weight • Age • Clothing Color

Physical Properties and Changes When we observe or describe something or someone we use

Physical Properties and Changes When we observe or describe something or someone we use “drivers license” descriptions. When we observe or describe MATTER we use some of the same descriptions.

List as many physical properties as you can…

List as many physical properties as you can…

Physical Properties and Changes Things you observe and can describe about matter: • Color

Physical Properties and Changes Things you observe and can describe about matter: • Color • Size • Smell • Freezing Point • Melting Point • Mass • Shape • Volume • Density

Physical Changes • Do NOT change the structure of matter when it is observed

Physical Changes • Do NOT change the structure of matter when it is observed or described. • What does “structure” mean? How the atoms are stuck together! Each letter is a different atom, and the lines that connect the letters show the STRUCTURE of the substance. And here each color represents a different atom and this picture shows the STRUCTURE of the

Physical Changes A physical change involves a change in which the particles/atoms are not

Physical Changes A physical change involves a change in which the particles/atoms are not rearranged – it is the same substance before and after. Before Change After Change

Examples of Physical Changes • Shape The shape of the wood changed. But is

Examples of Physical Changes • Shape The shape of the wood changed. But is it still a piece of wood?

Physical Changes • Shape

Physical Changes • Shape

Physical Changes • Color The tip of the nail changed color. But is it

Physical Changes • Color The tip of the nail changed color. But is it still a fingernail?

Physical Changes • Melting Point The ice cream melted. But does it still taste

Physical Changes • Melting Point The ice cream melted. But does it still taste like ice cream?

• What is the “structure” of water? • What is the “structure” of

• What is the “structure” of water? • What is the “structure” of ice? • What is the “structure” of steam?

• We just observed one of the physical properties of H 2 O!

• We just observed one of the physical properties of H 2 O! PHASE CHANGE: how a substance changes between solid, liquid, and gas We observed of how H 2 O is different in each phase, but the structure of H 2 O never changed!

You can think of Physical Changes like changing the font of a word… Science

You can think of Physical Changes like changing the font of a word… Science Class Science class Science Class The “structure” of the words is still the same, even though the physical appearance changed.

Chemical Properties and Changes • And you can think of Chemical Changes like rearranging

Chemical Properties and Changes • And you can think of Chemical Changes like rearranging the letters of the words… Science Classic Scene Scenic Scales Nice Class Sec Cans Slice Sec Sacs Licenses

Chemical Changes The letters are the same, but we’ve rearranged the structure and made

Chemical Changes The letters are the same, but we’ve rearranged the structure and made new words! This is what happens in a chemical change!

Chemical Change • A chemical change is when the particles of a substance are

Chemical Change • A chemical change is when the particles of a substance are broken apart and rearranged.

Chemical Changes What are some examples of Chemical Changes? • Flammability • Oxidation •

Chemical Changes What are some examples of Chemical Changes? • Flammability • Oxidation • Toxicity • Radioactivity • Sensitivity to Light

Chemical Properties and Changes • Flammability: – The ability to catch fire!

Chemical Properties and Changes • Flammability: – The ability to catch fire!

Chemical Properties and Changes • Oxidation – The ability to react with Oxygen

Chemical Properties and Changes • Oxidation – The ability to react with Oxygen

Chemical Properties and Changes • Toxicity – The ability to be poisonous

Chemical Properties and Changes • Toxicity – The ability to be poisonous

Chemical Properties and Changes • Sensitivity to Light – The ability to change when

Chemical Properties and Changes • Sensitivity to Light – The ability to change when exposed to light

Physical Properties Physical Changes Chemical Properties Chemical ChangesPhysical Properties Physical Changes Chemical Properties Chemical Changes
Chemical and Physical Changes Chemical Changes Chemical changesChemical and Physical Changes Chemical Changes Chemical changes
Physical and Chemical Changes Physical Changes Physical changesPhysical and Chemical Changes Physical Changes Physical changes
Physical and Chemical Changes Physical Changes Physical changesPhysical and Chemical Changes Physical Changes Physical changes
Chemical and Physical Changes Physical Changes Physical ChangesChemical and Physical Changes Physical Changes Physical Changes
Chemical Properties Physical and Chemical Changes Physical PropertiesChemical Properties Physical and Chemical Changes Physical Properties
Physical Chemical Properties Changes Properties Physical or ChemicalPhysical Chemical Properties Changes Properties Physical or Chemical
Physical Chemical Properties Changes Physical Properties A physicalPhysical Chemical Properties Changes Physical Properties A physical
PHYSICAL AND CHEMICAL CHANGES PHYSICAL AND CHEMICAL CHANGESPHYSICAL AND CHEMICAL CHANGES PHYSICAL AND CHEMICAL CHANGES
Physical Changes and Chemical Changes Physical Changes APhysical Changes and Chemical Changes Physical Changes A
Chemical Changes In Matter Chemical Properties Chemical PropertiesChemical Changes In Matter Chemical Properties Chemical Properties
Physical and Chemical Properties Physical and Chemical ChangesPhysical and Chemical Properties Physical and Chemical Changes
Physical and Chemical Properties Physical and Chemical ChangesPhysical and Chemical Properties Physical and Chemical Changes
Physical and Chemical Changes Physical and Chemical PropertiesPhysical and Chemical Changes Physical and Chemical Properties
Physical and Chemical Properties Chemical and Physical ChangesPhysical and Chemical Properties Chemical and Physical Changes
Physical and Chemical Properties Physical and Chemical ChangesPhysical and Chemical Properties Physical and Chemical Changes
Chemistry Physical and Chemical Properties Physical Chemical ChangesChemistry Physical and Chemical Properties Physical Chemical Changes
Chemistry Physical and Chemical Properties Physical Chemical ChangesChemistry Physical and Chemical Properties Physical Chemical Changes
Physical and Chemical Properties Physical Chemical Changes PurePhysical and Chemical Properties Physical Chemical Changes Pure
Physical and Chemical Changes Physical Changes Physical ChangePhysical and Chemical Changes Physical Changes Physical Change
Physical and Chemical Changes Physical Change Physical changesPhysical and Chemical Changes Physical Change Physical changes