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UNIT 5

UNIT 5. MATTER. Water changes when it heats up or it cools down . These changes are reversible. MATTER. Matter is made of atoms . Atoms are the building blocks of matter. Oxygen molecule is an element because there is one kind of atoms.

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UNIT 5

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  1. UNIT 5 MATTER

  2. Waterchangeswhenitheats up oritcoolsdown. Thesechanges are reversible.

  3. MATTER Matterismade of atoms. Atoms are thebuilding blocks of matter. Oxygen molecule is an element because there is one kind of atoms. Water molecule is a compound because there is two kinds of atoms.

  4. STATES OF MATTER Solid: themolecules are veryclosetogether. Liquid: themoleculesaren’t so closetogether . Gas: themolecules can movefreely.

  5. PHYSICAL CHANGES Thesubstancechangesbutthematterstaysthesame. TEMEPRATURE

  6. CHEMICAL CHANGES Thesubstanceschangesinto a differentsubstance.

  7. Puresubstance: can beelementsorcompounds. Mixtures: are made up of twoor more puresubstances.

  8. Waystoseparatethe mixtures

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