Changing States 3.5C

Changing States Vocabulary matter gas solid liquid heat temperature conductor insulator freezing melting evaporating

Matter Matter is anything that has mass and takes up space.

Solids Solids have a definite shape and volume. Solids have mass. Solids take up space.

Liquids Liquids have a definite volume but no definite shape. Liquids take the shape of their container. Liquids have mass. Liquids take up space.

Gasses Gasses have no definite shape or volume. Gasses spread out to fill the entire space given. Gasses have weight. Gasses take up space.

States of Matter What does it take for matter to move from one state to another?

Energy determines the state! SOLIDS LIQUIDS GASES + Energy

Add or Subtract Energy... When energy is added, particles move faster! When energy is removed, particles move slower!

Measure of the movement of molecules (tiny particles) in matter Measured using a thermometer or temperature probe Scientists use the Celsius scale to measure temperature

What will happen if heat is added? Why?

Solid + Energy = ? When energy is added to solids, they become liquids! Examples?

Liquid + Energy = ? When energy is added to liquids, they become gasses! What examples can you think of?

Changing States There are several names for matter changing states: State change Phase change Physical change

Ice changes to water—water changes to ice, frozen water is still water

Water changes to steam, a gas, when it is heated to its boiling point, water vapor condenses to form a liquid

Changes in State (phase changes) 1.Melting - solid to liquid 2.Freezing – liquid to solid

Changes in State (phase changes) 3.Evaporating – liquid to gas 4.Condensing - gas to liquid

So, did we get something new? Ice cream and melted ice cream? Chocolate and melted chocolate? Ice, water, and water vapor? Steel and molten steel?