Question | Answer |
shape, color, and texture are examples of | physical properties |
when energy is taken in or given off a__________has occurred | chemical change |
metal rusting is an example of a | chemical change |
_______measures how much mass is in a given volume | density |
temperature at which a SOLID turns into a LIQUID | melting point |
temperature at which a LIQUID turns into a GAS | boiling point |
in a chemical equation what is often put in front of an element or compound? | a coefficient |
a formula that uses symbols to show what happens in a chemical reaction | equation |
total mass is the same is the same befir abd after a physical or chemical change | conservation of mass |
when the original material is transformed into a new material, what has occurred | chemical change |
how something acts is its | behavior |
the chemicals before a chemical reaction occurs | reactants |
the chemicals that are formed after a chemical reaction occurs | products |
what is used to identify acids and bases | indicators |
in a chemical equation, both the reactants and the products must be | balanced |
acids are what two things? | sour and corrosive |
an example of an acid is a | lemon |
bases are________ | bitter |
an example of a base would be | cleaning products |
acids and bases are measured on what? | pH scale |
above 7 means | base |
below 7 means | acid |
exactly 7 means | neutral |
tearing paper, wax melting, peeling a potato, and sanding wood are all examples of______ because the substance doesn't change | physical changes |
wood burning, iron rusting, mild souring, and silver tarnishing are all examples of________ because the substance changes | chemical changes |
if you have an acid, then the litmus paper will always be what color? | red |
if you have a base, then the litmus paper will always be_________ | blue |
when the phenolphthalein paper turns pink, then the substance is a_______ | base |