Changes In Matter

All About Matter

What is Matter?•Matter is the stuff around

you•Anything made of atoms

and molecules•Anything that has mass

What are Elements?

• The building blocks of matter• Cannot be broken down into another

substance

Image from - http://www.vaughns-1-pagers.com/biology/human-periodic-table.gif

Atoms

• The smallest particle of an element that has the properties of the element

Parts of an Atom

• Nucleus – the center of an atom• Proton – particle of an atom that has a

positive charge• Neutron – particle of an atom that has no

charge• Electron – particle of an atom that has a

negative charge

What is a Molecule?

• Two or more atoms joined together

Compound• A substance made up of atoms of more than

one element joined together in a molecule

Compare Compounds and Molecules

• All compounds are molecules but not all molecules are compounds.

• Example - O2 and N2 are molecules (not compounds) because they have a single element

• Example - H2O and CO2 are compounds (and molecules) because they are made from more than one element.

Mixture• Two or more substances that are mixed

together, but can be separated out because their atoms are not combined

Solution• A mixture in which substances break up into

their most basic particle• Are too small to be seen• Spread evenly through another substance.

Physical PropertiesThe characteristics of an object that you can observe with your senses or measure.

1. Hardness-How hard or soft is it?2. Texture-What is its surface like?3. Mass-How heavy is it?4. Elasticity-How much will it stretch or bend before breaking?5. Odor-What does it smell like?6. Magnetism-It it magnetic?7. Melting Point-At what temperature will it melt or freeze?

States of MatterSolid

• It has a definite shape. • It has a definite mass. • It has a definite volume.

States of MatterLiquid

It does not have a definite shape. It has a definite mass. It has a definite volume.

States of MatterGas

It does not have a definite shape. It does not have a definite mass. It does not have a definite volume.

Physical Change• A change in any physical properties

of a substance, not in the substance itself.

Sometimes its Difficult to Tell

• Ask Yourself:• “Do I have the same substance

that I started with?”• If yes, then the changes it

underwent were all physical changes.

Chemical Properties

• Describes the way a substance reacts with other substances and changes into a new substance, either by combining with other elements or breaking apart into a new substance.

Sometimes its Difficult to Tell

Chemical properties are not as easy to observe aphysical properties.• Observe chemical properties when a

substance is being changed.Examples:Wood burningIron rusting

Chemical Change

• A change of one substance into another substance• Wood Ashes

• http://www.stovesonline.co.uk/stove/img/wood-burning.jpg http://urbangardenproject.files.wordpress.com/2009/03/wood-ashes-00.jpg

Requirements for the Photo Story

• Title Slide (titled black background in the Pics4learning folder)

• Drawing (in the drawing folder)• A minimum of 8 pictures (in the Pics4learning folder)• Narration• Motion• Transitions• Text• Credits (titled black background in the Pics4learning

folder)

Sample Title Slide

All About Matter:Elements and Atoms

By: Dottie Barrow

Your Drawing

Picture Slides

• At least 8 pictures • Motion• Transitions• Narration• Text

Sample Credits SlideCredits

Images from Pics4Learninghttp://www.pics4learning.com/Music form Mike Bell

Background Music