Atoms, Molecules, and Matter make up many if not all of the things in our world. Lets learn, together, what makes them very important to our world.
Density Formulas
Density formula – M/V
Mass formula – D x V
Volume Formula – M/D
Changes
Chemical Change: A change in matter that produces one or more new substances.
Physical Change: a change which alters the form or appearance of matter but does not make any new substance in the matter.
Physical Change
Ripping Paper
Paper turns into pieces. A physical change has occurred and the substance has not changed.
Chemical Change
Burning Paper
Paper turns into ash. A chemical reaction has occurred and the substance has changed to ash.
States of Change
Solid –
Has a fixed shape
Has a fixed volume
Particles have very little energy and movement speed
Particles arranged in tight regular pattern
Liquid –
Has no fixed shape
Has a fixed volume
Particles have more space
Particles are fairly close, but not neat, even arrangement
Gas –
Has no fixed shape
Has no fixed volume
Particles move rapidly
Particles have large spaces in between them
Change of States
Endothermic change –
Takes in Energy
Exothermic change –
Releases Energy
Vaporization –
Liquid to gas
Ex – Water Cycle
Condensation –
Goes from gas(vapor) to a liquid
Ex – Rain and Clouds
Sublimation –
From Solid to Gas
Ex – Dry Ice
Law of Conservation of Mass
The law of conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations. According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.
Definitions
Matter –
Matter is anything that has mass and takes up space.
Structure –
The arrangement of relations between the parts or elements of something with a complex basis.