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Junior School: Solids, Liquids & Gases

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SOLIDS, LIQUIDS & GASES

WHAT IS MATTER

Anything that takes up space is called matter. Air, water, rocks, and even people are examples of matter. Different types of matter can be described by their mass. The mass of an object is the amount of material that makes up the object. A bowling ball, for example, has more mass than a beach ball.

LIQUIDS

Liquid 

Atoms have many nearest neighbors in contact, yet no long-range order is present. 

SOLIDS

Solids

Particles in solids are held together very closely.  This makes them strong and difficult to break apart.  Solids can also hold their own space.  The particles don't move around very much but simple vibrate in their spot.

 

SUBLIMATION

Sublimation is a specialized change of state when a solid substance skips the liquid phase and moves directly into the gas phase. This occurs because the substance absorbs energy so quickly from the surroundings that melting never occurs.

Examples of sublimation 1. "Dry ice" or solid carbon dioxide sublimes.

Knowing the definition of Dye Sublimation Printing

CHANGES OF STATES

Change of state

Solids, liquids and gases can of course change between each other simply by heating or cooling them.

The processes involved in changing each states are

Starting state

Finishing state

Process

solid

liquid

melting

solid

gas

sublimation

liquid

solid

freezing

liquid

gas

evaporation

gas

liquid

condensation

 

GAS

Gas 

The spaces between gas molecules are very big. 
Gas molecules have very weak or no bonds at all. 
The molecules in "gas" can move freely and fast.
 

 

QUIZ YOURSELF - SOLIDS, LIQUIDS & GASES