Changes in Matter Section 3.3.

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Presentation transcript:

Changes in Matter Section 3.3

Physical Change a change in one or more of matter’s physical properties. Examples: size, shape, or state of matter the identity of the element or compound—does not change. Examples: Melting, Boiling, Freezing, Slicing, Crushing, Glass Breaking

Physical Changes

Chemical Change When matter changes chemically into an entirely different substance with different chemical properties. change of one substance to another (makes something new) https://youtu.be/BqeWpywDuiY

Signs of Chemical Change Color Change Smoke/Odor Heat Light Bubbles Precipitate any new physical properties that were not present before

Chemical Change

Chemical Changes

Physical & Chemical Changes of Matter http://studyjams.scholastic.com/studyjams/jams/science/matter/changes-of-matter.htm

Reversing Chemical Changes Because chemical changes produce new substances, they often cannot be undone. Example: fried egg back to raw egg Some can be reversed Example: remove tarnish from pennies with vinegar

Conservation of Mass Law of conservation of mass – matter cannot be created or destroyed. Example: camp fire https://www.brainpop.com/science/matterandchemistry/conservationofmass/