By Isabelle Stoffer
Atoms, Elements, Molecules, Compounds
Atoms- An atom is the basic particle from which all elements are made.
Elements-A pure substance that cannot be broken down into other substances by physical or chemical means.
Molecules - A particle made of two or more atoms together
Compounds- A pure substance made of two or more atoms combined.
Physical and Chemical properties
Physical Properties- Something you can change that wont change the object.
Chemical Properties- Something that makes the object what it is.
Physical and Chemical Changes
Physical Change- A change that will just change it's physical properties.
Example- Painting a pencil a different color.
Chemical Change- A change that will change the object into something else.
Example- Burning a pencil.
Endothermic and Exothermic
Endothermic Change- Something that take something else's energy.
Example- A ice cube melting in your hand
Exothermic Change- Something that gives out energy.
Example- A candle Giving off heat.
Three States of Matter
Solid- In a solid the particles are so close to gather and can only vibrate instead of being able to move around freely. It is like this because it has a strong force attraction. An example of this state a ice cube.
Liquid- In a liquid particles can move around but can't go anywhere they want. It is because the force attraction is weaker than a solid but still strong enough. An example of this state is water.
Gas- In a gas the particles are able to go wherever they please. It is like this because there is no force attraction in a gas. An example of a gas is helium.
Changes of State
Matter changes from one state to another by either freezing or warming up. Also by adding or decreasing pressure.
All five state changes-
Liquid to Solid
Solid to Liquid
Liquid to Gas
Solid to Gas
Gas to Liquid
Energy relates to matter changing state because by adding or losing different temperatures you are adding or losing energy.