|Atom||smallest unit of matter|
|Matter||anything that has mass or volume|
|Examples of matter||Humans, smoke,textbook , water,ladybug ..etc|
|Examples of non-matter||Energy
light & sound
|Mass||How much matter is in something|
|Weight||The pull of gravity on an object|
|Element||Contains only one type of atom|
|Molecule||Two or more atoms that are chemically combined|
|Formula for volume :||length* width* height|
|Formula for density :||mass/volume|
|Earth – Moon mass and weight||Mass stays the same . Weight decreases on the moon because there is less gravity.|
|How can you separate compounds?||By breaking the bonds between two or more atoms|
|Do atoms and molecules move?||Yes,all atoms and molecules move.
They vibrate in a solid.
They slide in a liquid.
They move freely in gas
|What does it mean if a substance is pure?||It only has one type of component .|