Science Study Guide

Exothermic

change when energy is released; combustion realeases heat and EME

Endothermic

change when energy is taken into the reaction. Energy enters the reaction.

examples of chemical changes

combustion, electrolysis, oxidation, tarnishing

Other physical changes

dissolving, blending, crushing, breaking and substances

What is a chemical change?

A change in matter that produces one or more new substances

Exothermic

Change when energy is released: combustion releases heat and eme.

Define temperature

ability to do work or cause change

heat has a specific movmeent in which direction does it move

hot to cold always

What does the LOCM state

matter cant be created or destroyed ( chem or physical). THe same amount of matter that is at the beginning of the reaction will be the same amount that is at the end.

Three states of matter

solid, liquid, gas

whats the difference between a state of matter and a phase of matter

state- the form of the matter at a given temp and pressure as you see it here and now. Phase- Described changes that matter takes when it goes from one state to another.

Define thermal energy

the total kinetic energy of the particles that make up a substance