Matter
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Matter PowerPoint PPT Presentation


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Matter. States of Matter Changes in matter. States of Matter. Solid Liquid Gas. Solids. Microscopic view of a solid. Definite volume Definite shape Atoms are packed together if fixed positions Strong attractive forces between atoms Only vibrate in place. Liquids.

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Matter

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Matter

Matter

States of Matter

Changes in matter


States of matter

States of Matter

  • Solid

  • Liquid

  • Gas


Solids

Solids

Microscopic view of a solid

  • Definite volume

  • Definite shape

  • Atoms are packed together if fixed positions

  • Strong attractive forces between atoms

  • Only vibrate in place


Liquids

Liquids

Microscopic view of a liquid

  • Definite volume

  • Indefinite shape

  • Atoms are close together

  • Atoms can overcome attractive forces to flow


Gases

Microscopic view of a gas

Gases

  • Indefinite volume and shape

  • Atoms move very fast

  • Atoms are far apart

  • Weak attractive forces


Changes in matter

Changes in Matter

Physical Change

Chemical Change


Physical change

Physical change

  • change in a substance that doesn’t change the identity of the substance

    • Example: Includes all changes in the state of matter (physical changes of a substance from one state to another)

    • Grinding

    • cutting

    • Melting

    • boiling


Changes in the state of matter

Changes in the state of matter

deposition


Chemical change

Chemical change

  • a change in which a substance is converted into a different substance

  • same as chemical reaction

  • doesn’t change the amount of matter present


Signs of a chemical change

Signs of a chemical change

  • Energy is absorbed or given off (change in temperature)

  • change in color or odor

  • production of gas

  • Irreversible


Chemical or physical change

Chemical or Physical Change?

physical

  • Water boils

  • Salt dissolves in water

  • Milk spoils

  • A metal chair rusts

  • Paper is torn

  • A tree burns down

physical

chemical

chemical

physical

chemical


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