SOLIDS, LIQUIDS, AND GASES

SOLIDS, LIQUIDS, AND GASES

States of Matter

Solid, liquid, and gas are all st at es of m a t t e r .

SOLID Facts:

The m olecules in solids are tightly packed t oget her. Solids also can hold their own shape. Exam ple of solid = a brick

Le sson Ch e ck poin t : D e scr ibe a SOLI D .

LIQUID Facts:

The m olecules in liquids are not as close as t hose in solids; t hey have a little m ore room to m ove around.

Liquids t ake t he shape of t he cont ainer int o which t hey are poured.

Exam ple of liSquiigdn= Inwat er. Sign Up

Le sson Ch e ck poin t : D e scr ibe a LI QUI D .

GAS Facts:

The m olecules in gases are far apart . Gases can fill any size room or any size cont ainer. Ex am ple of a gas = helium .

Le sson Ch e ck poin t : D e scr ibe a GAS.

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The Water Cycle: Matter Can Change Forms!

Evaporat ion Ev aporat ion is t he process by which wat er changes from liquid form t o gas form (in the form of water vapor). Which st age of wat er cy cle shows t he process of e v a por a t ion ?

Matter Changes State at Specific Temperatures

When m at t er changes or t ransform s from one st at e t o anot her, t he t em perat ure of the m at ter helps det erm ine when it changes. A liquid's boiling point is the tem perature when a liquid begins to boil and becom es a gas ( wat er vapor) . Different liquids have different boiling point s. The boiling point of wat er is 100? C. So when wat er boils, it becom es st eam or water vapor, t he gas form of wat er. The m e lt in g poin t is t he t em perat ure at which m at t er changes from a solid t o a liquid. An ice cube's m elt ing point is 0? C. That is when an ice cube changes from a solid int o a liquid. A liquid's freezing point is the tem perature point when a liquid

tbheactomfreeeszainsgopliodi.nWt ,Saittiegbrne'scIofnrmeeezsinicgeS.poiginnt iUs p0? C. When wat er reaches

Le sson Ch e ck poin t : At w h a t t e m pe r a t u r e doe s w a t e r boil?

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